Pseudosedum

Pseudosedum is a genus of flowering plants in the family Crassulaceae ( Crassulaceae ). The botanical name of the genus Pseudosedum derives from the Greek word for pseudo 'false' and the genus Sedum name and means " wrong Sedum ". The genus contains about ten to 13 species. Any use by humans is not known.

Description

Pseudosedum species are mostly herbaceous plants. The roots are thin, string -like to nodular. Some sessile, brown, scale-like leaves are basal together. There are unbranched in the growing season, erect to ascending stems formed with many alternate arranged, sessile, fleshy, simple, ganzrandigen foliage leaves, which are linear to oblong with rounded cross-section. Stipules absent.

The terminal, usually branched, often composed of schirmrispigen part inflorescences total inflorescences contain many flowers and bracts. The stalked flowers are hermaphroditic and five to sechszählig. The five to six sepals are meaty and very short fused only at their base. The five membranous, pink staining on purple to violet or reddish and upon drying golden yellow or white petals are fused to funnel - to bell-shaped, almost half of their length. There are two circles, each with five or six stamens present. The stamens are fused to the corolla tube. The nectar scales are square. The five to six upright carpels are fused only at their base and contain many ovules. The pens are narrow.

The elongated follicles contain many seeds. The small seeds are usually oblong and brown.

Systematics and distribution

The genus Pseudosedum is common only in the central Asia: China (two species), Mongolia, Pakistan (two species), Tajikistan ( five types ), Kazakhstan, Kyrgyzstan, Uzbekistan, Russia, Afghanistan and Iran.

In 1930, Alwin Berger the genus Pseudosedum in Adolf Engler & Prantl Carl: The natural plant families, Second Edition, 18 (a), p 465. The species of these genera were previously sect as a section umbilicus. Pseudosedum Boiss. classified in the genus Umbilicus Pierre Edmond Boissier of flora orientalis, 2, 775, 1872.

The genus belongs to the subtribe Pseudosedum Telephiinae from the tribe Sedeae in the subfamily Sedoideae within the family Crassulaceae. The genus includes the following species:

• Pseudosedum acutisepalum Jansson: The homeland is Afghanistan and Iran.
• Pseudosedum bucharicum Boriss.
• Pseudosedum campanuliflorum Boriss.
• Pseudosedum condensatum Boriss. Their range extends from Pakistan, Afghanistan, Iran and Russia.
• Pseudosedum fedtschenkoanum Boriss.
• Pseudosedum ferganense Boriss. Pseudosedum ferganense subsp. ferganense
• Pseudosedum ferganense subsp. parvum

Swell

• Kunjun Fu, Hideaki Ohba & Michael G. Gilbert: Crassulaceae in the Flora of China, Volume 8, 2001, p 213: Pseudosedum - Online. (Section Description and systematics)
• Ghulam Rasool Sarwar: Crassulaceae in the Flora of Pakistan: Pseudosedum - Online. ( Description section )
• S. & H. Ohba Mayuzumi: The phylogenetic position of East Asian Sedoideae ( Crassulaceae ) inferred from chloroplast and nuclear DNA sequences, Systematic Botany in, 29, 2004, pp. 587-598. . ( Section systematics)
• Urs Eggli (Editor): Illustrated Handbook of Succulent Plants - Crassulaceae, Springer- Verlag, Berlin, Heidelberg, 2003, ISBN 978-3-540-41965-5.