Biology:Thelypodium eucosmum
Thelypodium eucosmum | |
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Scientific classification ![]() | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Rosids |
Order: | Brassicales |
Family: | Brassicaceae |
Genus: | Thelypodium |
Species: | T. eucosmum
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Binomial name | |
Thelypodium eucosmum B.L.Rob.
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Thelypodium eucosmum is a species of flowering plant in the mustard family known by the common names arrow-leaf thelypody[1] and world thelypody. It is endemic to Oregon in the United States, where it is known from Grant and Wheeler Counties.[2] There are also historical records of the plant from Baker County.[3]
This species is a biennial or short-lived perennial herb. It produces an erect, branching stem which can reach a meter in height. The basal leaves are lance-shaped or sometimes oval in shape and are borne on a short petiole. The leaves higher on the stem are smaller and have no petiole.[4] They may clasp the stem[3] or may be arrowhead-shaped, with projections extending around the stem. The inflorescence is a raceme of many flowers with purple petals. The fruit is a silique up to 6.5 centimeters long.[4]
This species occurs in the Blue Mountains of Oregon, and along tributaries of the John Day River.[5] Its habitat is dominated by sagebrush and juniper. It grows in moist areas such as river canyons and streambanks.[2][5] The plant's population size is greatly affected by the availability of water.[5] Other plants in the habitat may include Balsamorhiza spp., Bromus mollis, B. tectorum, Ericameria nauseosa, Gutierrezia sarothrae, Hordeum murinum, Lepidium spp., Purshia tridentata, Salix spp., Sarcobatus vermiculatus, and Urtica dioica.[3]
Grazing is a main threat to the species; some populations have been extirpated by livestock grazing.[5]
References
- ↑ "Thelypodium eucosmum". Natural Resources Conservation Service PLANTS Database. USDA. https://plants.usda.gov/core/profile?symbol=THEU. Retrieved 9 December 2015.
- ↑ 2.0 2.1 Thelypodium eucosmum. Center for Plant Conservation.
- ↑ 3.0 3.1 3.2 Thelypodium eucosmum. Oregon Department of Agriculture.
- ↑ 4.0 4.1 Thelypodium eucosmum. Flora of North America.
- ↑ 5.0 5.1 5.2 5.3 Thelypodium eucosmum. NatureServe.
Wikidata ☰ Q7781140 entry
![]() | Original source: https://en.wikipedia.org/wiki/Thelypodium eucosmum.
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