Penthorum
| Penthorum | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name of the family | ||||||||||||
| Penthoraceae | ||||||||||||
| Rydb. ex Britton | ||||||||||||
| Scientific name of the genus | ||||||||||||
| Penthorum | ||||||||||||
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Penthorum is the only genus of the family of Penthoraceae in the order of the saxifrage-like (Saxifragales).
description
The Penthorum species are upright, perennial herbaceous plants . They form rhizomes . The alternate and spirally arranged leaves are at most short-stalked and simple. The leaf margin is sawn. The lanceolate leaf blade is pinnate. Stipules are missing.
Many flowers are arranged in terminal or axillary, zymous inflorescences . The small, hermaphrodite, radially symmetrical flowers are usually five, rarely up to eight. The mostly five (rarely up to eight) sepals are short fused; they are upright during the flowering period, but bent back on the fruit. There are one to eight greenish to whitish petals or they are missing. There are one or two circles with usually five, rarely up to eight free, fertile stamens each. The stamens are thread-like. The pollen is colporat. Five (up to eight rare) partly under constant carpels are free or at a ovary grown. Each carpel contains 30 to 100 (many) ovules . The short stylus end in a heady scar.
Usually five, rarely up to eight, multi-seeded follicles are formed per flower .
Systematics and distribution
The genus Penthorum was previously classified in the Saxifragaceae family.
In the genus Penthorum and thus in the family Penthoraceae there are only two species. The genus has a disjoint area : It is native to temperate to tropical eastern Asia, Indochina and Atlantic North America.
- Penthorum chinense Pursh : The home is Asia: in Japan , Korea , Laos , Mongolia , Russia , Thailand , Vietnam and in the Chinese provinces of Anhui, Gansu, Guangdong, Guangxi, Guizhou, Hebei, Heilongjiang, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Jilin, Liaoning, Shaanxi, Sichuan, Yunnan. Penthorum chinense thrives in forests, meadows, floodplains and on the banks of the plains up to altitudes of 2,200 meters.
- Penthorum sedoides L .: It is native to North America: in large areas of the USA and in the Canadian provinces of New Brunswick, Ontario, Quebec, southeastern Manitoba.
use
The leaves of Penthorum sedoides are eaten cooked. The Indians used parts of plants medicinally.
swell
- The family of Penthoraceae in APWebsite. (engl.)
- The Penthoraceae family at DELTA by L. Watson & MJ Dallwitz. (engl.)
- J. Thiede: Penthoraceae in Klaus Kubitzki: The Families and Genera of Vascular Plants , Volume 9, 2007. ISBN 978-3-540-32214-6
- Pan Jintang & Douglas E. Soltis: Penthorum in the Flora of China , Volume 8, p. 271: Online .
Individual evidence
- ↑ Entry in Plants for a Future. (engl.)
Web links
- The Penthoraceae family at GRIN. (engl.)