Planodes mexicanum
| Planodes mexicanum | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Planodes mexicanum | ||||||||||||
| ( S. Watson ) Al-Shehbaz |
Planodes mexicanum is one of only two North American plant species of the genus Planodes inthe cruciferous family (Brassicaceae). It is only known from the Mexican state of Guanajuato .
description
Planodes mexicanum grows as an annual , herbaceous , completely hairless plant. The leaves are arranged in basal rosettes and alternately distributed on the stem. The leaf blade is pinnate or deeply split with ovate to lanceolate leaf lobes.
The flowers stand together in elongated, umbrella- shaped inflorescences . The hermaphrodite flowers are fourfold. The four petals are white.
The inelastic, up to 1 millimeter wide pods have flat flaps and rounded partitions. The seeds , about 0.5 millimeters wide, are winged.
distribution
Planodes mexicanum is only known by its holotype . This was collected in the Mexican state of Guanajuato .
Systematics
Planodes mexicanum was the basionym Arabis mexicana 1882 by Sereno Watson in Proceedings of the American Academy of Arts and Sciences , Volume 17, pp 319 firstdescribed and 1941 by Reed Clark Rollins as Sibara mexicana named. In 2010 Ihsan Ali Al-Shehbaz placed Arabis mexicana (Syn. Sibara mexicana (S.Watson) Rollins ) as Planodes mexicanum in the genus Planodes . It is in the tribe Cardamineae within the family of the cruciferous plants (Brassicaceae).
swell
literature
- Ihsan A. Al-Shehbaz: Arabis mexicana Belongs to Planodes (Brassicaceae) . In: Harvard Papers in Botany . tape 15 , no. 1 , June 2010, ISSN 1043-4534 , p. 137–138 , doi : 10.3100 / 025.015.0106 (English, generic description, key to and distribution of Planodes mexicanum ).