caa a22 4500 465821618 CHVBK 20180323112137.0 cr unu---uuuuu 170327e19901201xx s 000 0 eng 10.1007/BF00047241 doi (NATIONALLICENCE)springer-10.1007/BF00047241 Hagemann Wolfgang Institut für Systematische Botanik und Pflanzengeographie der Universität Heidelberg, West Germany aut Comparative morphology of acrogenous branch systems and phylogenetic considerations. II. Angiosperms [Elektronische Daten] [Wolfgang Hagemann] A concept for a primitive angiospermous branch system is given in order to have a starting point for the derivation of the diverse and highly differentiated branch systems observed in contemporary angiosperms. Hitherto Troll's (1964, 1969) comparative study of the synflorescences in this plant group — developed out predominantly on herbaceous plants — was the most comprehensive and sophisticated treatment dealing with branch systems. Unfortunately, the work on tropical tree architecture by Hallé et al. (1978) has no reference to the classical studies of Troll and his pupils. Thus Müller-Doblies and Weberling (1984) emphasized the high degree of terminological incompatibility between the two works. Angiosperms are seen as a monophyletic plant division. Consequently, the branch system of the first primitive angiosperms must be the starting point in the evolution of the abundant diversity of branch systems and growth forms of modern angiosperms. If it is accepted that primitive angiospermous shoots were terminated by a large flower, one may assume, that the reproductive end of the shoot was enriched by paracladia early in evolution, thereby developing a terminal inflorescence instead of a single flower. Thus the primitive shoot unit was divided into a basal vegetative region — the trophotagma, branching retardively — and the reproductive terminal region, the anthotagma, branching simultaneously. It is demonstrated through a selection of different examples, that the construction of such a system possesses the options for several modifications, enabling the evolution of the abundant diversity of branch systems which characterizes contemporary angiosperms. Kluwer Academic Publishers, 1990 Acta Biotheoretica Kluwer Academic Publishers 38/3-4(1990-12-01), 207-242 0001-5342 38:3-4<207 1990 38 10441 https://doi.org/10.1007/BF00047241 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00047241 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Hagemann Wolfgang Institut für Systematische Botanik und Pflanzengeographie der Universität Heidelberg, West Germany aut NATIONALLICENCE 773 0- Acta Biotheoretica Kluwer Academic Publishers 38/3-4(1990-12-01), 207-242 0001-5342 38:3-4<207 1990 38 10441 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer