Download e-book for kindle: A Biosystematic Study of the African and Madagascan by Christian Puff

By Christian Puff

ISBN-10: 3709188512

ISBN-13: 9783709188514

ISBN-10: 3709188539

ISBN-13: 9783709188538

Biosystematic reviews at the Rubiaceae have a protracted culture on the Institute of Botany in Vienna. inside this kin the Anthospermeae, and particularly its African and Madagascan participants, are of specific curiosity as a result of a number of points of their evolution: I) Perfection of anemophily inside an in a different way approximately completely zoophilous kinfolk; 2) transitions from hermaphrodity to polygamy and eventually dioecy; three) differentiation from huge and long-lived shrubs to short-lived herbs; four) adaptive radiation from humid to seasonally dry, fire-exposed and xeric habitats. even though, morphological variety associated with sexual differentia­ tion, modificatory plasticity, and eco-geographical polymorphism have for a very long time hampered our realizing of the relationships between those African Anthospermeae. therefore, it was once crucial to place distinct emphasis on box observations and to hold out quite a few experiments with cultivated crops as well as the research of a major herbarium fabric. the writer, hence, conducted wide box paintings, usually lower than very adversarial stipulations, and lined such a lot African nations from Ethiopia to Southern Africa and two times visited Madagascar. during this means a large number of knowledge used to be amassed at the team in admire to germination and development shape, vegetative and reproductive morphology, anatomy and biology, embryology, karyology, crossing relationships, phytochemistry, distribu­ tion and ecology, etc.

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Additional resources for A Biosystematic Study of the African and Madagascan Rubiaceae-Anthospermeae

Sample text

Vaginellata, Fig. 10 b). , C. heteromorpha, or C. lOc-d, l5g). The remaining taxa have broader (often ovate-Ianceolate) and larger leaves; those of C. gigantea, being by far the largest in the genus, may be up to 70 (80) mm long. , A. herbaceum, C. gigantea: Table 2). In addition, there are distinctly con- and revolutely rolled leaves ("echte kon- und revolute Rollbliitter" of NAPP-ZINN 1973-1974). Revolutely rolled leaves - first mentioned for A. hirtum by KNOBLAUCH 4. , in populations of A. dregei subsp.

A semi schematic illustration of branching pattern. The starting point of shoots presumably developed in the current season are marked with thick arrows; thin arrows indicate possible continuation of growth in the following growing season; open circles stand for flowers or fruits; the positions of old flowers/fruits are marked with crosses. Note frequent sympodial-monochasial branching and trend to anisophylly of leaf pairs below flowers. b anisophyllous leaf pair below a flower. Only one leafis well developed (= bract oflateral shoot); the leaf blade on the left is very poorly developed and hardly discernible from the triangular setae borne on the stipular sheath N.

Ternatum subsp. randii, for example, is often recorded as being an annual. Plants often occur in fire-prone habitats, are killed by fire and regenerate from seed. Consequently, plants encountered in the field are mostly young flowering individuals in their first growing season. Careful investigations of populations, however, reveal that plants growing in microhabitats sheltered from fire can become at least a few years old. It is, therefore, rather misleading to call this taxon an annual. 2. Browsing According to field observations, plants of the following taxa are browsed by sheep or goats: Anthospermum dregei subsp.

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A Biosystematic Study of the African and Madagascan Rubiaceae-Anthospermeae by Christian Puff

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