Vernonieae

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Vernonieae
Detail of the inflorescence with cup-shaped partial inflorescences of Vernonia noveboracensis

Detail of the inflorescence with cup-shaped partial inflorescences of Vernonia noveboracensis

Systematics
Asterids
Euasterids II
Order : Astern-like (Asterales)
Family : Daisy family (Asteraceae)
Subfamily : Cichorioideae
Tribe : Vernonieae
Scientific name
Vernonieae
Cass.

Vernonieae is a tribe in the Asteraceae plant family. The name honors the English botanist William Vernon . The total distribution is almost worldwide, predominantly in tropical to warm areas.

description

The species of the Tribus Vernonieae are herbaceous plants : annual, biennial or perennial herbaceous ; or woody plants: Half bushes , shrubs , rarely trees or vines . Vernonia arborea , native to tropical Asia, grows as a tree with heights of 20 to 33 meters. The leaves, which are mostly alternate and distributed in basal rosettes or on the stem, are predominantly sessile. The leaf blade is usually simple, often with more or less serrated, rarely smooth or lobed leaf margin; it is seldom divided.

In doldentraubigen to rispigen total inflorescences are basket-shaped part inflorescences together. The petals are fused to form a tube. This has five corolla lobes, which clearly shows that the corolla tube is made up of five petals. The petals are usually purple or pink, rarely white, but never yellow.

The achenes have a permanent pappus that has two rows of scales or bristles.

Systematics

According to Harold Ernest Robinson 1999, about 100 to 140 genera with about 1300 species belong to the Tribus Vernonieae . According to an earlier view of the genera, 80% of the species belonged to the genus Vernonia . According to today's view, there are only about 20 New World species in the genus Scheinastern ( Vernonia see str.).

Centratherum punctatum subsp. punctatum
Inflorescence with cup-shaped partial inflorescences of Vernonia baldwinii

Genera

Here is a list with all 118 genera:

use

Some species are eaten as leafy vegetables in Central and West Africa, such as Gymnanthemum amygdalinum (Delile) Sch. Gdp. ex Walp. , Syn .: Vernonia amygdalina Delile = (bitter spinach, Ndolé ). Vernonia arkansana DC. , from southern North America, is cultivated in Europe as an ornamental plant.

swell

  • Theodore M. Barkley, Luc Brouillet, John L. Strother: Asteraceae. : Vernonieae, p. 214 - same text online as the printed work , In: Flora of North America Editorial Committee (Ed.): Flora of North America North of Mexico. Volume 19: Magnoliophyta: Asteridae, part 6: Asteraceae, part 1 (Mutisieae – Anthemideae ), Oxford University Press, New York and Oxford, 2006. ISBN 0-19-530563-9 (sections description and systematics)

further reading

  • Harold Ernest Robinson: The status of generic and subtribal revisions in the Vernonieae. In: DJN Hind, HJ Beentje (Ed.): Compositae: Systematics. in Proceedings of the International Compositae Conference, Key, 1994. Volume 1, pp. 511-529. Royal Botanic Gardens, Kew, 1996.
  • Harold Ernest Robinson: Generic and subtribal classification of American Vernonieae , In: Smithsonian Contrib. Bot. , Volume 89, 1999, pp. 1-116.
  • Yilin Chen, Michael G. Gilbert: Tribe Vernonieae , 354 - online with the same text as the printed work , In: Wu Zheng-yi, Peter H. Raven, Deyuan Hong (ed.): Flora of China. Volume 20-21: Asteraceae , Science Press and Missouri Botanical Garden Press, Beijing and St. Louis, 2011. ISBN 978-1-935641-07-0

Web links

Commons : Vernonieae  - collection of images, videos and audio files