General aspects of angiosperm evolution and macrosystematics
Rolf Dahlgren
Botanical Museum, Univ. of Copenhagen, Gothersgade 130, DK–1123 Copenhagen K, Denmark.
Search for more papers by this authorRolf Dahlgren
Botanical Museum, Univ. of Copenhagen, Gothersgade 130, DK–1123 Copenhagen K, Denmark.
Search for more papers by this authorAbstract
Taxonomy makes increasing use of significant results from many fields of research including the rapidly developing fields of micro– and macromolecular chemistry, ultrastructure and micromorphology in combination with macromorphology, anatomy, embryology, cytology, paleontology, biological interaction and distribution. Some of these results have contributed to make the current systems of classifications more concordant. Recent studies on Cretaceous fossils are related to present–day angiosperms and their floral types. It is concluded that pleiomerous flowers with helically arranged parts (corresponding to the Magnolia type, though probably less elaborate), on the basis of recent evidence can still be regarded as the probably earliest floral type in angiosperms. But the trimerous flowers must also have appeared very early, at least in the Albian. There is also evidence that the monocotyledons had differentiated as a separate group at that time. Similarities between certain extant monocotyledons and certain dicotyledons, in particular between some Dios–coreales and some Annonales–Aristolochiales, indicate that the monocotyledons had their roots in early Cretaceous pro–Magnoliiflorae. Fossil petaliferous flowers from Cenomanian layers, and later of a variety of flower types, such as the obdiplostemo–nous, petaliferous, epigynous Scandianthus (similar to extant saxifragaceous genera), or flowers with secondarily pleiomerous androecia of the theaceous type are discussed in relation to the distribution of corresponding floral types in extant dicotyledons. The main features of the author's classification of angiosperms are outlined with notes on important, though often neglected, aspects and critical problems. Finally, an updated table of classification down to family rank is presented.
References
- Ali, S. I. & Jafri, S. M. H. 1977. Flora of Libya, 21. VahIiaceae. — Al Faateh Univ., Tripoli .
- Arber, E. A. N. & Parkin, J. 1907. On the origin of angiosperms J. Linn. Soc. Bot. 38: 29–44.
10.1111/j.1095-8339.1907.tb01074.x Google Scholar
- Axelrod, D. I. 1970. Mesozoic paleogeographic and early angiosperm history Bot. Rev. 36: 277–319.
- Baas, P. 1975. Vegetative anatomy and the affinities of Aquifoliaceae, Sphenostemon, Phelline, and Oncotheca. Blumea 22: 311–407.
- Behnke, H.-D. 1969. Die Siebröhren—Plastiden der Monocotyledonen. Vergleichende Untersuchungen über Feinbau und Verbreitung eines characteristischen Plastidentyps Planta (Berlin) 84: 174–184.
- Behnke, H.-D. 1971. Zum Feinbau der Siebrohren—Plastiden von Aristolochia und Asarum (Aristolochiaceae). Planta (Berlin) 97: 62–69.
- Behnke, H.-D. 1977. Phloem ultrastructure and systematic position of Gyrostemonaceae Bot. Notiser 130: 255–260.
- Behnke, H.-D. 1981a. Sieve element characters Nord. J. Bot. 1: 381–400.
10.1111/j.1756-1051.1981.tb00706.x Google Scholar
- Behnke, H.-D. 1981b. Siebelelement—Plastiden, Phloem—Protein und Evolution der Bliitenpflanzen: II. Monocotyledonen Ber. Deutsch. Bot. Ges. 94: 647–662.
- Behnke, H.-D. & Dahlgren, R. 1976. The distribution of characters within an angiosperm system, 2. Sieve element plastids Bot. Notiser 129: 289–295.
- Berg, C. C. 1977. Urticales, their differentiation and systematic position Plant Syst. Evol., Suppl. 1: 349–374.
- Boesewinkel, F. D. 1980. Development of ovule and testa of Linum usitatissimum L. Acta Bot. Neerl. 29: 17–32.
- Boesewinkel, F. D. & Been, W. 1979. Development of ovule and testa of Geranium pratense L. and some other representatives of the Geraniaceae. Acta Bot. Neerl. 28: 335–348.
- Boesewinkel, F. D. & Geenen, J. 1980. Development of ovule and seed—coat of Erythroxylon coca Lamk. Acta Bot. Neerl. 29: 231–241.
- Bohlmann, F., Burkhardt, T. & Zdero, C. 1973. Naturally occurring acetylenes. — Academic Press, London .
- Bolt-Jørgensen, L. 1981. Myrosin cells and dilated cisternae of the endoplasmatic reticulum in the order Capparales Nord. J. Bot. 1: 433–445.
10.1111/j.1756-1051.1981.tb00709.x Google Scholar
- Boulter, D. 1972. The use of comparative amino acid sequence data in evolutionary studies of higher plants Progr. Phytochem. 3: 199–229.
- Boulter, D. 1973. The use of amino acid sequence data in the classification of higher plants. — In: G. Bendz & J. Santesson (eds.), Chemistry in botanical classification. Academic Press, London , pp. 211–216.
- Boulter, D., Peacock, D., Guise, A., Gleaves, J. T. & Estabrook, G. 1979. Relationships between the partial amino acid sequences of plastocyanin from members of ten families of flowering plants Phytochemistry 18: 603–608.
- Bremer, K. & Wanntorp, H.-E. 1978. Phylogenetic systematics in taxonomy Taxon 27: 317–329.
- Burger, W. C. 1977. The Piperales and the monocots; alternate hypotheses for the origin of monocotyledonous flowers Bot. Rev. 4: 345–393.
- Burger, W. C. 1981. Heresy reviewed: the monocot theory of angiosperm origin Evol. Theory 5: 189–225.
- Carlquist, S. 1969. Towards acceptable evolutionary interpretations of floral anatomy Phytomorphology 19: 332–362.
- Carlquist, S. 1978. Wood anatomy and relationships of Bataceae, Gyrostemonaceae, and Stylobasiaceae Allertonia 1: 297–330.
- Carlquist, S. 1980. Anatomy and systematics of Balanopaceae Allertonia 2: 191–246.
- Chupov, V. S. & Kutiavina, N. G. 1978. The comparative immuno—electrophoretic investigations of seed proteins of Liliaceae (in Russian) Bot. Zh. (Leningrad) 63: 473–493.
- Carlquist, S. & Kutiavina, N. G. 1981. Serological studies in the order Liliales (in Russian) Bot. Zh. (Leningrad) 66: 75–81.
- Cocucci, A. E. 196576. Estudios en el genero Prosopanche (Hydnoraceae). I–III. Kurtziana 2: 53–74 (1965); 8: 7–15 (1975); 9: 19–39 (1976).
- Corner, E. J. H. 1976. The seeds of dicotyledons. — Cambridge Univ. Press, Cambridge .
- Cronquist, A. 1978. The Zingiberidae, a new subclass of Liliopsida (Monocotyledons). Brittonia 30: 505.
- Cronquist, A. 1981. An integrated system of classification of flowering plants. — Columbia Univ. Press, New York .
- Cullen, J. 1978. A preliminary survey of ptyxis (venation) in the angiosperms Notes Roy. Bot. Gard. Edinburgh 37: 161–214.
- Daghlian, C. P. 1981. A review of the fossil record of monocotyledons Bot. Rev. 47: 517–555.
- Dahlgren, R. (with Hansen, B., Jakobsen, K. & Larsen, K.) 1974. Angiospermernes taxonomi, I. — Akademisk Forlag, København .
- Dahlgren, R. 1975a. A system of classification of the angiosperms to be used to demonstrate the distribution of characters Bot. Notiser 128: 119–147.
- Dahlgren, R. (with Hansen, B., Jakobsen, K. & Larsen, K.) 1975b. Angiospermernes taxonomi, 3. — Akademisk Forlag, København .
- Dahlgren, R. 1977a. A commentary on a diagrammatic presentation of the angiosperms in relation to the distribution of character states Plant Syst. Evol., Suppl. 1: 253–283.
- Dahlgren, R. 1977b. A note on the taxonomy of the “Sympetalae” and related groups. Publ. Cairo Univ. Herb. 7–8: 83–102.
- Dahlgren, R. 1980a. A revised system of classification of the angiosperms Bot. J. Linn. Soc. 80: 91–124.
- Dahlgren, R. 1980b. The taxonomic significance of chlorophyllous embryos in angiosperm seeds Bot. Notiser 133: 337–342.
- Dahlgren, R. (with Hansen, B., Jakobsen, K., Jensen, S. R., Larsen, K. & Nielsen, B.J.) 1979. Angiospermernes taxonomi, 1. ( ed. 2). — Akademisk Forlag, København .
- Dahlgren, R. & Clifford, H. T. 1981. Some conclusions from a comparative study of the monocotyledons and related dicotyledonous orders Ber. Deutsch. Bot. Ges. 94: 203–227.
- Dahlgren, R. & Clifford, H. T. 1982. The Monocotyledons: a comparative study. — Academic, London .
- Dahlgren, R., Fairbrothers, D. E., Jensen, S. R. & Nielsen, B. J. 1978. Invitation to a Cornalean Project, (off-set). -Copenhagen.
- Dahlgren, R., Jensen, S. R. & Nielsen, B. J. 1976. Iridoid compounds in Fouquieriaceae and notes on its possible affinities Bot. Notiser 129: 207–212.
- Dahlgren, R., Jensen, S. R. & Nielsen, B. J. 1981. A revised classification of the angiosperms with comments on correlation between chemical and other characters. — In: D. A. Young & D. S. Seigler (eds.) Phytochemistry and angiosperm phylogeny, Praeger, New York , pp. 149–199.
- Dahlgren, R., Nielsen, B. J., Goldblatt, P. & Rourke, J. P. 1979. Further notes on Retziaceae: its chemical contents and affinities Ann. Missouri Bot. Gard. 66: 545–556.
- Dahlgren, R. & Thome, R. F. 1983. The order Myrtales, circumscription, variation, and relationships. Ann. Missouri Bot. Gard. (in press).
- Davis, G. L. 1966. Systematic embryology of the angiosperms. — J. Wiley, New York .
- DeBuhr, L. E. 1975. Phylogenetic relationships of the Sarraceniaceae Taxon 24: 294–306.
10.2307/1218339 Google Scholar
- Dickison, W. C. 1972. Observations on the floral morphology of some species of Saurauia, Actinidia and Clematoclethra. J. Elisha Mitchell Sci. Soc. 88: 43–54.
- Dickison, W. C. 1981. Evolutionary relationships of the Leguminosae. — In: R. M. Polhill & P. H. Raven (eds.), Advances in legume systematics, Kew, Richmond , pp. 35–54.
- Dilcher, D. L. 1974. Approaches to the identification of angiosperm leaf remains Bot. Rev. 40: 1–157.
- Dilcher, D. L. 1979. Early angiosperm reproduction: an introductory report Rev. Paleobot. Palyn. 27: 291–328.
- Dilcher, D. L. & Basinger, J. F. 1980. Bisexual flowers from the midCretaceous. IOP: Intern. Paleobot. Conf., Reading, England, July 1980: abstracts.
- Dilcher, D. L., Crepet, W. L., Beeker, C. D. & Reynolds, H. C. 1976. Reproductive and vegetative morphology of a Cretaceous angiosperm Science 191: 854–856.
- Doyle, J. A. 1973. Fossil evidence on early evolution of the monocotyledons Quart. Rev. Biol. 28: 399–413.
- Doyle, J. A. 1977. Patterns of evolution in early angiosperms. — In: A. Hallam (ed.) Patterns of evolution, Elsevier, Amsterdam , pp. 501–546.
- Doyle, J. A. 1978. Origin of angiosperms Ann. Rev. Ecol. Syst. 9: 365–392.
- Doyle, J. A. & Hickey, L. J. 1976. Pollen and leaves from the midCretaceous Potomac Group and their bearing on early angiosperm evolution. — In: C. B. Beck (ed.), Origin and early evolution of the angiosperms, Columbia Univ. Press, New York , pp. 139–206.
- Ehrendorfer, F. 1977. New ideas about the early differentiation of angiosperms Plant Syst. Evol., Suppl. 1: 227–234.
- Emberger, L. 1960. Les végétaux vasculaires. — In: M. Chaudefaut & L. Emberger (eds.), Traite de botanique, II, Masson, Paris .
- Endress, P. 1969 (1970), Gesichtspunkte zur systematischen Stellung der Eupteleaceen (Magnoliales). Untersuchungen über Bau und Entwicklung der generativen Region bei Euptelea polyandra (Sieb. et Zucc.) Ber. Schweitz. Bot. Ges. 79: 229–278.
- Endress, P. 1977. Evolutionary trends in the Hamamelidales—Fagales group Plant Syst. Evol., Suppl. 1: 321–347.
- Erdtman, G. 1952. Pollen morphology and plant taxonomy. Angiosperms. — Almqvist & Wiksell, Stockholm .
- Fairbrothers, D. E. 1977. Perspectives in plant serotaxonomy Ann. Missouri Bot. Gard. 64: 147–160.
- Ferguson, I. K. 1977. Cornaceae. World Pollen and Spore Flora, 6.
- Friis, E. M. & Skarby, A. 1981. Structurally preserved angiosperm flowers from the upper Cretaceous of southern Sweden Nature 291: 485–486.
- Friis, E. M. & Skarby, A. 1982. Scandianthus gen. nov., angiosperm flowers of saxifragalean affinity from the upper Cretaceous of southern Sweden. Ann. Bot. (in press).
- Frohne, D. & John, J. 1978. The Primulales: serological contributions to the problem of their systematic position Biochem. Syst. Ecol. 6: 315–322.
- Garcia, V. 1962. Embryological studies in the Loasaceae with special reference to endosperm haustoria. — In: Anonymous, Plant embryology. A symposium, CSIR, New Delhi , pp. 157–161.
- Goldblatt, R., Nowicke, J. W., Mabry, T. J. & Behnke, H.-D. 1976. Gyrostemonaceae, status and affinity Bot. Notiser 129: 201–206.
- Gornall, R. J., Bohm, B. A. & Dahlgren, R. 1979. The distribution of flavonoids in the angiosperms Bot. Notiser 132: 1–30.
- Gottsberger, G. 1977. Some aspects of beetle pollination in the evolution of flowering plants Plant Syst. Evol., Suppl. 1: 211–226.
- Gottwald, H. 1977. The anatomy of secondary xylem and the classification of ancient dicotyledons Plant Syst. Evol., Suppl. 1: 111–122.
- Grund, C. & Jensen, U. 1981. Systematic relationships of the Saxifragales revealed by serological characteristics of seed proteins Plant Syst. Evol. 137: 1–22.
- Haines, R. W. & Lye, K. A. 1975. Seedlings of Nymphaeaceae Bot. J. Linn. Soc. 70: 255–265.
- Hamann, U. 1961. Merkmalsbestand und Verwandtschaftsbe—ziehungen der “Farinosae Willdenowia 2: 639–768.
- Hamann, U. 1962. Weiteres iiber Merkmalsbestand und Verwandtschafftsbeziehungen der “Farinosae Willdenowia 3: 169–207.
- Hammond, H. D. 1955. Systematic serological studies in Ranunculaceae Bull. Serol. Mus. 14: 1–3.
- Harling, G. 1958. Monograph of the Cyclanthaceae. Acta Hort. Berg. 18 (1): 1–428.
- Harris, P. J. & Hartley, R. D. 1980. Phenolic constituents of the cell walls of monocotyledons Biochem. Syst. Evol. 8: 153–160.
- Hegnauer, R. 1974. Chemotaxonomie der Pflanzen, 3. — Birkhäuser, Basel .
- Hegnauer, R. 1966. Aucubinartige Glucoside. Über die Verbreitung und Bedeutung als systematisches Merkmal Pharm. Acta Helv. 41: 577–587.
- Hegnauer, R. 1977. Cyanogenic compounds as systematic markers in Tracheophyta Plant Syst. Evol., Suppl. 1: 191–210.
- Hegnauer, R. & Kooimann, P. 1978. Die systematische Bedeutung von iridoiden Inhaltsstoffen in Rahmen von Wettstein's Tubiflorae Planta Medica 33: 1–33.
- Hennig, W. 1950. Grundzüge einer Theorie der Phylogenetischen Systematik. — Deutscher Zentralverlag, Berlin .
- Hickey, L. J. & Doyle, J. A. 1977. Early Cretaceous fossil evidence for angiosperm evolution Bot. Rev. 43: 3–104.
- Hickey, L. J. & Wolfe, J. A. 1975. The bases of angiosperm phylogeny: vegetative morphology Ann. Missouri Bot. Gard. 62: 538–589.
- Hideaux, M. J. & Ferguson, I. K. 1976. The stereostructure of the exine and its evolutionary significance in Saxifragaceae sensu lato. — In: I. K. Ferguson & J. Muller (eds.) The evolutionary significance of the exine, Academic, London , pp. 327–377.
- Huber, H. 1963. Die Verwandtschaftsverhaltnisse der Rosifloren Mitteil. Bot. Staatssamml. Munchen 5: 1–48.
- Huber, H. 1969. Die Samenmerkmale und Verwandtschaftsverhaltnisse der Liliiflorae Mitteil. Bot. Staatssamml. Munchen 8: 219–538.
- Huber, H. 1977. The treatment of the monocotyledons in an evolutionary system of classification Plant Syst. Evol., Suppl. 1: 285–298.
- Hughes, N. F. 1961. Fossil evidence and angiosperm ancestry Sci. Progr. 48: 84–102.
- Hughes, N. F. 1976. Paleobotany of angiosperm origins. — Cambridge Univ. Press, Cambridge .
- Hutchinson, J. 1926. The families of flowering plants. I. Dicotyledons. — Macmillan, London .
10.2307/3901895 Google Scholar
- Hutchinson, J. 1969. Evolution and phylogeny of flowering plants. Dicotyledons: facts and theory. — Academic, London .
- Inamdar, J. A. & Aleykutty, K. M. 1979. Studies on Cabomba aquatica (Cabombaceae). Plant Syst. Evol. 132: 161–166.
- Jensen, S. R., Nielsen, B. J. & Dahlgren, R. 1975. Iridoid compounds, their occurrence and systematic importance in angiosperms Bot. Notiser 128: 148–180.
- Jensen, U. 1968. Serologische Beitrage zur Systematik der Ranunculaceae Bot. Jahrb. 88: 204–268.
- John, J. & Kolbe, K.-P. 1980. The systematic position of the “Theales” from the viewpoint of serology Biochem. Syst. Evol. 8: 241–248.
- Kolbe, K.-P. 1973. Serologischer Beitrag zur Systematik der Capparales unter besonderer Beriicksichtigung der inneren Gliederung der Brassicaceae. Diss., Kiel.
- Kolbe, K.-P. 1978. Serologischer Beitrag zur Systematik der Capparales Bot. Jahrb. Syst. 99: 468–489.
- Kolbe, K.-P. & John, J. 1979. Serologische Untersuchungen zur Systematik der Violates Bot. Jahrb. Syst. 101: 3–15.
- Kolbe, K.-P. & John, J. 1980. Serology and systematics of the “Ebenales” and the “Theales Biochem. Syst. Ecol. 8: 249–256.
- Kooiman, P. 1969. The occurrence of asperulosidic glycosides in the Rubiaceae Acta Bot. Need. 18: 124–137.
- Kooiman, P. 1970. The occurrence of iridoid glycosides in the Scrophulariaceae Acta Bot. Neerl. 19: 329–340.
- Kooiman, P. 1972. The occurrence of iridoid glycosides in the Labiate Acta Bot. Neerl. 21: 417–427.
- Krassilov, V. 1973. Mesozoic plants and the problem of angiosperm ancestry Lethaia 6: 163–178.
- Krassilov, V. 1975. Dirhopalostachyaceae — a new family of proangiosperms and its bearing on the problem of angiosperm ancestry Paleontographia, Abt. B 153: 100–110.
- Kohler, E. 1965. Die Pollenmorphologie der biovulaten Euphorbiaceae und ihre Bedeutung fur die Taxonomie Grana Palyn. 6: 26–120.
10.1080/00173136509429138 Google Scholar
- Kohler, E. 1980. Zur Pollenmorphologie und systematischen Stellung der Didymelaceae Leandri Feddes Repert. 91: 581–591.
10.1002/fedr.19800910904 Google Scholar
- Kohler, E. 1981. Pollen morphology of the West Indian — Central American species of the genus Buxus L. (Buxaceae) with reference to taxonomy. Pollen et Spores 23: 37–91.
- Lee, D. W. & Fairbrothers, D. E. 1972. Taxonomie placement of the Typhales within the monocotyledons: preliminary serological investigation Taxon 21: 39–44.
10.2307/1219219 Google Scholar
- Lee, D. W. & Fairbrothers, D. E. 1978. Serological approaches to the systematics of the Rubiaceae and related families Taxon 27: 159–185.
- A. J. M. Leeuwenberg (ed.) 1980. Die naturlichen Pflanzenfamilien, 28 b I. Angiospermae: Ordnung Gentianales. Fam. Loganiaceae. — Duncker & Humblot, Berlin .
- Leins, P. 1975. Die Beziehungen zwischen multistaminaten und einfachen Androeceen Bot. Jahrb. Syst. 96: 231–237.
- Lotsy, J. P. 1911. Vorträge über botanische Stammesgeschichte. Cormophyta siphonogamia, 3. — G. Fischer, Jena .
- Mabry, T. J. & Bohlmann, F. 1977. Summary of the chemistry of the Compositae. — In: V. H. Heywood et al. (eds.) The biology and chemistry of the Compositae, Academic Press, London , pp. 1097–1104.
- Marloth, R. 1925. The flora of South Africa 2(1).— Cambridge .
- Martin, A. C. 1946. The comparative internal morphology of seeds Amer. Midland Nat. 36: 513–660.
- Meeuse, A. D. J. 1972. Taxonomie affinities between Piperales and Polycarpicae and their implications in interpretative floral morphology. Adv. Plant Morph.: 3–27.
- Meeuse, A. D. J. 1975a. Floral evolution in the Hamamelidae. 1. General assessment of the probable phylogeny and taxonomie position of the group Acta Bot. Neerl. 24: 155–164.
- Meeuse, A. D. J. 1975b. Floral evolution in the Hamamelidae. II. Interpretative floral morphology of the Amentiferae Acta Bot. Neerl. 24: 165–179.
- Meeuse, A. D. J. 1975c. Floral evolution of the Hamamelidae. III. Hamamelidales and associated groups including Urticales, and final conclusions Acta Bot. Neerl. 24: 181–191.
- Meeuse, A. D. J. 1975d. Taxonomie relationships of Salicaceae and Flacourtiaceae: their bearing on interpretative floral morphology and dilleniid phylogeny Acta Bot. Neel. 24: 437–457.
- Meeuse, A. D. J. 1979. The anthocorm theory a summary, (stencil). Hugo de Vries Laboratorium.
- Melville, R. 196263. A new theory of the angiosperm flower: I–II. Kew Bull. 16: 1–50; 17: 1–65.
10.2307/4120346 Google Scholar
- Menezes, N. L. de 1980. Evolution in Velloziaceae, with special reference to androecial characters. — In: D. D. Brickell et al. (eds.), Petaloid monocotyledons, Academic, London , pp. 117–138.
- Moore, H. E. Jr. 1973. The major groups of palms and their distributions Gentes Herb. 11: 27–141.
- Moore, H. E. Jr. & Uhl, N. W. Major trends of evolution in palms. Bot. Rev. 48: 1–69.
- Muller, J. 1981. Fossil pollen records of extant angiosperms Bot. Rev. 47: 1–146.
- Nowicke, J. W. & Skvarla, J. J. 1977. Pollen morphology and the relationship of the Plumbaginaceae, Polygonaceae, and Primulaceae to the order Centrospermae. Smithsonian Contr. Bot. 37.
- Nowicke, J. W. & Skvarla, J. J. 1980. Pollen morphology: the potential influence in higher order systematics Ann. Missouri Bot. Gard. 66: 633–700.
- Pacltova, B. 1971. Palynological studies of Angiospermae from the Peruc Formation (?Albian—Lower Cenomanian) of Bohemia Ustr. Ustav. Geol., Sb. Geol. Ved. Paleontol., rada, 13: 105–141.
- Petersen, F. P. & Fairbrothers, D. E. 1979. Serological investigations of selected amentiferous taxa Syst. Bot. 4: 230–241.
- Philipson, W. R. 1974. Ovular morphology and the major classification of the dicotyledons Bot. J. Linn. Soc. 68: 89–108.
- Prance, G. T. 1970. The genera of Chrysobalanaceae in the southeastern United States J. Arnold Arbor. 51: 521–528.
10.5962/bhl.part.7048 Google Scholar
- Rasmussen, H. 1981. Terminology and classification of stomata and stoma development A critical survey. Bot. J. Linn. Soc. 83: 199–212.
- Rauh, W. & JägerZürn, I. 1966. Zur Kenntnis der Hydrostachyaceae. I. Sitzungsber. Heidelberger Akad. Wiss., Math. Naturwiss. Kl. 1966 (I): 1–117.
- Retallack, G. & Dilcher, D. L. 1981a. Arguments for a glossopterid ancestry of angiosperms Paleobiology 7: 54–67.
- Retallack, G. & Dilcher, D. L. 1981b. Early angiosperm reproduction: Priscia reynoldsii, gen. et sp. nov. from midCretaceous coastal deposits in Kansas, U.S.A. Paleontographia, Abt. B 179: 103–137.
- Rodman, J. E. 1981. Divergence, convergence, and parallelism in phytochemical characters: the glucosinolate—myrosinase system. — In: D. A. Young & D. S. Seigler (eds.), Phyto-chemistry and angiosperm phylogeny, Praeger, New York , pp. 43–79.
- Samylina, V. A. 1968. Early angiosperms within the territory of the Soviet Union (on the basis of the investigations of leaves and fruits), (in Russian.) Bot. Zh. 53: 1517–1530.
- Sattler, R. & Singh, V. 1978. Floral organogenesis of Echinodorus amazonicus Rataj and floral construction of the Alismatales. Bot. J. Linn. Soc. 71: 141–156.
10.1111/j.1095-8339.1978.tb01396.x Google Scholar
- Saville, D. B. O. 1979. Fungi as aids in higher plant classification Bot. Rev. 45: 377–503.
10.1007/BF02860873 Google Scholar
- Schmid, R. 1978. Actinidiaceae, Davidiaceae, and Paracryphiaceae: systematic considerations Bot. Jahrb. Syst. 100: 196–204.
- Schmid, R. 1979. Reproductive anatomy of Actinidia chinensis (Actinidiaceae). Bot. Jahrb. Syst. 100: 149–195.
- Schulze, W. 197580. Beiträge zur Taxonomie der Liliifloren. Wiss. Zeitschr. Fr. Schiller Univ. Jena, Math. Nat. Wiss. R. 24: 403–415 (I. Asphodelaceae); 24: 417–428 (II. Colchicaceae); 27: 79–35 (III. Alstroemeriaceae); 27: 87–95 (IV. Melanthiaceae); 29: 595–606 (V. Alliaceae); 29: 607–636 (VI. Der Umfang der Liliaceae).
- Schweitzer, H. J. 1977. Die Räto—Jurassischen Floren des Iran und Afganistans: 4. Die Rätische Zwitterblüte Irania hermaphroditica sp. nov. und ihre Bedeutung für die Phylogenie der Angiospermen. Palaeontographia, Abt. B 161: 98–145.
- Singh, V. & Sattler, R. 1972. Floral development of Alisma triviale. Canad. J. Bot. 50: 619–627.
- Singh, V. & Sattler, R. 1977. Development of the inflorescence and flower of Sagittaria cuneata. Canad. J. Bot. 55: 1087–1105.
- Sporne, K. R. 1974. The morphology of angiosperms. —Hutchinson, London .
- Stebbins, F. L. 1974. Flowering plants. Evolution above the species level. — Belknap, Cambridge , Mass .
10.4159/harvard.9780674864856 Google Scholar
- Takhtajan, A. 1969. Flowering plants. Origin and dispersal. —Oliver & Boyd, Edinburgh .
- Takhtajan, A. 1980. Outline of the classification of flowering plants (Magnoliophyta) Bot. Rev. 46: 225–359.
- Tamura, M. 1972. Morphology and phyletic relationship of the Glaucidiaceae Bot. Mag. Tokyo 85: 29–41.
- Thorne, R. F. 1976. A phylogenetic classification of the Angiospermae Evol. Biol. 9: 35–106.
10.1007/978-1-4615-6950-3_2 Google Scholar
- Thorne, R. F. 1981. Phytochemistry and angiosperm phylogeny, a summary statement. — In: D. A. Young & D. S. Seigler (eds.) Phytochemistry and angiosperm phylogeny, Praeger, New York , pp. 233–295.
- Tomlinson, P. B. 1970. Monocotyledons—towards an understanding of their morphology and anatomy. — In: R. D. Preston (ed.) Advances of botanical research. Academic Press, London and New York .
- Uhl, N. W. & Moore, H. E. 1977. Centrifugal stamen initiation in phytelephantoid palms Amer. J. Bot. 64: 1152–1161.
- Uhl, N. W. & Moore, H. E. 1980. Androecial development in six polyandrous genera representing five major groups of palms Ann. Bot. 45: 57–75.
- Vakhrameev, V. A. & Krassilov, V. 1979. Reproductive organs of a shoot of a flowering plant from the Albian of Kazakhstan (in Russian). Paleontol. Zh. for 1979: 121–128.
- Vani-Hardev. 1972. Systematic embryology of Roridula gorgonias Planch. Beitr. Biol. Pflanzen 48: 339–351.
- Vijayaraghavan, M. R. 1965. Morphology and embryology of Actinidia polygama, and systematic position of the family Actinidiaceae. Phytomorphology 15: 224–235.
- Vliet, G. C. M. van & Baas, P. 1983. Wood anatomy and classification of the Myrtales. Ann. Missouri Bot. Gard. (in press).
- Wagenitz, G. 1975a. Blutenreduktion als ein zentrales Problem der Angiospermen—Systematik Bot. Jahrb. Syst. 96: 448–470.
- Wagenitz, G. 1975b. (1976). Systematics and phylogeny of the Compositae (Asteraceae). Plant Syst. Evol. 125: 29–46.
- Wilder, G. J. 1981. Structure and development of Cyclanthus bipartitus Poit. (Cyclanthaceae) with reference to other Cyclanthaceae. I. Rhizome, inflorescence, root and symmetry. Bot. Gaz. 142: 96–114.
- Wolfe, J. A., Doyle, J. A. & Page, V. M. 1975. The bases of angiosperm phylogeny: paleobotany Ann. Missouri Bot. Gard. 62: 801–824.
- Wunderlich, R. 1959. Zur Frage der Phylogenie der Endo—spermtypen bei den Angiospermen Osterreich. Bot. Zeitschr. 106: 203–293.
10.1007/BF01289802 Google Scholar
- Wunderlich, R. 1971. Die systematische Stellung von Theligonum. Österreich. Bot. Zeitschr. 119: 329–394.
- Yakovlev, M. S. & Zhukova, G. Y. 1980. Chlorophyll in embryos of angiosperm seeds, a review Bot. Notiser 133: 323–336.
- Young, D. A. 1981a. The usefulness of flavonoids in angiosperm phylogeny: some selected examples. — In: D. A. Young & D. S. Seigler (eds.) Phytochemistry and Angiosperm Phylogeny, Praeger, New York , pp. 205–232.
- Young, D. A. 1981b. Are the angiosperms primitively vesselless Syst. Bot. 6: 313–330.