Acta Biotheoretica 11 (2):45-56 (1955)

Abstract
Some recent trends of modern biology, which seem to have a most consequential influence to the further treatment of the problem of the origin and evolution of flowering plants, are shortly reviewed in this article.Several new discoveries and observations about pollinating insects revealed to some extent the mystery of the evolution of flower types. The deciphering of the definite signs and codes of communication among social insects and the interpretation of a well developed sign language of bees belong to the most remarkable achievements of modern biology indeed. Besides its revolutionary impulse in the field of animal behavior these discoveries helped to solve several problems in the evolution of flowering plants.An attempt is made in this article to classify the existing main flower types according to their evolutionary tendency from primitive → simple → radiate → protected → zygomorphic flowers In this assortment of flower types is reflected the historical development of flowering plants since their early beginning in Cretaceous period till their domination in the recent world vegetation .In this evolution of flower types is mirrored further the progressive evolvement of numerous senses of the pollinating insects. The pollinators of the Middle Mesozoicum were surrounded by primitive flower types and could distinguish but some primitive colors like white, yellow and green.Two different methods of classification of flowering plants are used in this study. A typological assortment of flowers according to their ecological characteristics is co-ordinated with the taxonomic classification of phylogenetic groups . The evolution of angiosperms can be studied more successfully, if both the typological and taxonomic trends of this groups are analyzed.Quelques nouvelles découvertes et essais sur la dissémination du pollen par les insectes sont discutés du point de vue de l'évolution des types de fleur. L'activité sélective et la stabilité de ces insectes se trouvent être des facteurs les plus conséquents dans l'évolution des types de fleurs.Deux méthodes différentes de classification des plantes angiospermes sont employées dans cette étude. Un assortiment typologique de fleurs suivant leurs caractéristiques écologiques est coordiné avec la classification systématique des groupes phylogénétiques . L'évolution des angiospermes peut être étudiée avec plus de succès si les méthodes typologiques et systématiqes sont appliquées.Es werden in diesem Aufsatz einige neue Versuchsergebnisse über die wechselseitigen Beziehungen zwischen den pollenübertragenden Insekten und der Entwicklungsgeschichte der Blütentypen näher erörtert.Es sind unter diesen Umständen zwei verschiedene Arbeitsverfahren für die Klassifikation der Blütenpflanzen angewandt worden. Eine typologische Einteilung nach den ökologischen Merkmalen und eine systematische Schilderung nach den phylogenetischen Gruppen . Die Anwendung von diesen beiden Methoden gestattet uns eine bessere Übersicht über die Entwicklungsgeschichte der Blütenpflanzen
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DOI 10.1007/BF01602631
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Citations of this work BETA

Directional Trend of Floral Evolution.E. E. Leppik - 1968 - Acta Biotheoretica 18 (1-4):87-102.
Phyllotaxis, Anthotaxis and Semataxis.E. E. Leppik - 1961 - Acta Biotheoretica 14 (1-2):1-28.
A Theory on the Ancestry of Angiosperms.Hui -Lin Li - 1960 - Acta Biotheoretica 13 (4):185-202.

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