Icacinaceae

from Wikipedia, the free encyclopedia
Icacinaceae
Cassinopsis ilicifolia

Cassinopsis ilicifolia

Systematics
Class : Bedecktsamer (Magnoliopsida)
Eudicotyledons
Nuclear eudicotyledons
Asterids
Euasterids I
Family : Icacinaceae
Scientific name
Icacinaceae
Miers

The Icacinaceae are a family of tropical and subtropical plant species.

description

Illustration of Apodytes dimidiata
Some species of the family produce edible fruits, such as Lavigeria macrocarpa ("Bush carrot")

The Icacinaceae are woody plants: trees , shrubs or lianas . With some types of lianas, a white milky sap emerges from their stem axis when damaged ; other species do not have such a colored milky sap. Most alternate , in some liana species probably against constantly arranged leaves are usually not stalked. The leathery leaf blades are simple . The leaf margin is often lobed or toothed. There are no stipules.

The inflorescences are zymös , paniculate or otherwise structured. The unisexual or hermaphrodite flowers are often inconspicuous. The small, radially symmetrical flowers are tetracyclic (there is only one stamen circle) and usually four or five-fold (rarely three or six-fold). There are no or four or five (rarely three or six) sepals . There are no or four to five (rarely three or six) petals present; they are all free or all grown together. The four or five (rarely three or six) stamens are free from each other. Most three (rarely two, four, or five) carpels have become a top permanent ovary grown. The only pistil per flower ends in one to five stigmas .

The fruits are fleshy drupes or samaras , which are single-seeded, winged nut fruits ; in some species the fruits are edible.

Systematics and distribution

They are mainly found in the tropics and subtropics , but some taxa are also found in temperate South Africa and eastern Australia .

The Icacinaceae are not assigned to any order within the Euasteriden I , as their exact position within this group has not yet been clarified.

The internal systematics of the Icacinaceae family is controversial, 24 or 25 (or with some authors between 35 and 52) genera are assigned to it. Depending on the number of genera assigned, 149 up to 400 species belong to the family. The AP website follows the view of Kårehed (2001, 2002) according to which the family has the smaller size of 24 to 25 genera with a maximum of 150 species.

The following genera belong to the family without being contradicted:

swell

Individual evidence

  1. Angiosperm Phylogeny Group : An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III. In: Botanical Journal of the Linnean Society. Vol. 161, No. 2, 2009, ISSN  0024-4074 , pp. 105-121 doi : 10.1111 / j.1095-8339.2009.00996.x
  2. a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah David John Mabberley: Mabberley's Plant-Book. A portable dictionary of plants, their classification and uses . 3. Edition. Cambridge University Press, 2008, ISBN 978-0-521-82071-4 ( limited preview in Google Book Search).

Web links

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