Descurainia


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Related to Descurainia: Descurainia pinnata

Descurainia

 

a genus of plants of the family Cruciferae. They are annual, occasionally biennial, grasses whose pinnatisect leaves are divided into two or three narrow even threadlike, lobes. The blossoms have yellow petals, and the pods are slender and cylindrical. There are approximately 50 species, primarily in North America; only a few are found in Eurasia and Africa. In the USSR there are two species, including D. sophia, which is found throughout the country in refuse areas, by habitations, in fields, along roads, and on meadows and slopes.

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Descurainia sophia and Bromus tectorum, the two most-frequent introduced species encountered in our study, are both winter annuals that were most prevalent within the Sagebrush community in the May sampling period.
Ray cells are notably thick walled in Descurainia millefolia and Parolinia ornata, and could be termed sclereids.
Descurainia pinnata (Walter) M Rt Tcp Britton Lepidium virginicum L.
Napus, hitqa, H tuktu, ataqo, mostaza 33 Capsella bursa-pastoris Shullak kiwa, H Moench shullak qura, yullaq wayta 34 Descurainia myriophylla Hakapashillun H (Willd.
Calamagrostis (13), Nototriche (7), Poa (6), Belloa (5), Dissanthelium (4), Draba (4), Werneria (4), Xenophyllum (4), Cerastium (3), Descurainia (3), Loricaria (3), Perezia (3) y Valeriana (3).
Equisetum laevigatum, Hesperostipa comata, and Nessella viridula were the tallest species found in nongrazed plots while Carex stenophylla, Descurainia pinnata, and Ratibida columnifera were the tallest species in grazed plots.
Species of: Polygonum aviculare, Chenopodium album, Sinapis arvensis, Cardaria draba, Galium tricornatm, Acroptilon repense, Descurainia sophia were the most important broad-leaved weeds of irrigated-wheat fields.