Euchresta
| Euchresta | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name of the tribe | ||||||||||||
| Euchresteae | ||||||||||||
| ( Nakai ) Ohashi | ||||||||||||
| Scientific name of the genus | ||||||||||||
| Euchresta | ||||||||||||
| Benn. |
Euchresta is the only genus of the tribe Euchresteae within the family of legumes (Fabaceae). This genus occurs with about four species in Asia .
description
Appearance and leaves
The Euchresta species are shrubs .
The alternately arranged, stalked leaves are pinnate unpaired, with three to seven leaflets . The petiole has a pad. The pinnate leaves are arranged opposite to each other on the rhachis leaf. The stipules are small and fall off early, there are no stipules of the pinnate leaves.
Inflorescences and flowers
In traubigen total inflorescences the flowers and small, durable stand bracts together. Cover sheets are missing.
The hermaphrodite flowers are zygomorphic and five-fold with a double flower envelope . The five sepals are bell-shaped to tubular fused with five calyx teeth. The corolla, which towers above the calyx, has the typical structure of a butterfly flower. The nailed, almost upright, narrow flag is a little longer than the wing and shuttle. The free, very long nailed wings are elongated, blunt or slightly sickle-shaped. The shuttle is very similar to the wings. The filaments of nine of the ten stamens are somewhat fused together and the small anthers are all the same. The single carpel contains only one or mostly two ovules . The thin, curved stylus ends in a small, head-shaped scar.
Fruits and seeds
The stone fruit-like, egg-shaped or ellipsoidal, bluish-purple colored legumes do not open when ripe and contain only one seed. The seeds have a membranous, white seed coat (testa).
Sets of chromosomes
The basic chromosome number is x = 9.
Systematics and distribution
The genus Euchresta occurs in India , Bhutan , Nepal , China , Vietnam , Korea , Laos , Thailand , Taiwan , Japan , Indonesia and the Philippines .
The first description of the genus Euchresta was in 1840 by Johannes Joseph Bennett in Plantae Javanicae Rariores , p. 148, plate 31. Type species is Euchresta horsfieldii , which in 1810 as Andira horsfieldii Lesch. was first described. The genus of the Euchresta is the only genus of the tribe Euchresteae in the subfamily Faboideae within the family Fabaceae . The Tribe Euchresteae (Nakai) Ohashi was first published in 1973 by Hiroyoshi Ohashi in Journal of Japanese Botany , 48, 229.
There are about four types of Euchresta (here with details of their home regions):
- Euchresta formosana (Hayata) Ohwi : It is native to Taiwan, the Japanese Ryūkyū Islands and the Philippines.
- Euchresta horsfieldii (Lesch.) Benn. : It occurs in India, Bhutan, Nepal, Laos, Thailand, Vietnam, Indonesia, the Philippines and the Chinese provinces of southeastern Yunnan and southeastern Xizang .
- Euchresta japonica Hook. f. ex rule (Syn .: Euchresta trifoliata Merrill ): It occurs in Japan, Korea and the Chinese provinces of Guangdong , Guangxi , Guizhou , Hunan , Jiangxi , Sichuan , Zhejiang .
- Euchresta tubulosa Dunn : With three varieties, it occurs at altitudes between 300 and 1700 meters only in the Chinese provinces of Guangxi, northwestern Hubei , Hunan, Sichuan and Yunnan.
swell
- Hang Sun & Kai Larsen: Euchresteae in the Flora of China , Volume 10, 2010, p. 98 Tribus, genus and species. (Section description and systematics)
- Robert Hegnauer: Chemotaxonomie der Pflanzen , Volume XIB-2, Springer, 2001. ISBN 3-7643-5862-9 (Euchresteae: page 1030-1036)
Web links
- Fruits and Seeds from USDA: Euchresteae . (PDF; 122 kB)