Dimeresia
| Doublet | |
|---|---|
| |
| Dimeresia howellii | |
| Scientific classification | |
| Kingdom: | |
| (unranked): | |
| (unranked): | |
| (unranked): | |
| Order: | |
| Family: | |
| Tribe: | |
| Genus: | Dimeresia |
| Species: | D. howellii
|
| Binomial name | |
| Dimeresia howellii | |
| Synonyms[1] | |
| |
Dimeresia is a monotypic genus in the sunflower family containing the single species Dimeresia howellii, known by the common name doublet.[2][3][4]
Distribution
This uncommon plant is endemic to an area of the Great Basin region in the western United States, in northeastern California, southeastern Oregon, southwestern Idaho, and northwestern Nevada.[2][5][6][7]
It grows in dry volcanic soils, primarily on the Modoc Plateau volcanic plain, at elevations of 1,500–2,400 metres (4,900–7,900 ft).[5]
Description
Dimeresia howellii is a very tiny annual flowering plant rarely exceeding 4 centimeters in height or width. It forms a small tuft on the ground with several oval-shaped leaves, and is cobwebby at base and glandular above.[5]
The inflorescence has tiny white to purple bell-shaped flowers each a few millimeters long.[5] The flowering period is May to August.[2]
References
- ^ Flann, C (ed) 2009+ Global Compositae Checklist search for Dimeresia
- ^ a b c Calflora: Dimeresia howellii
- ^ Gray, Asa. 1886. Synoptical Flora of North America 1(2): 448–449
- ^ Tropicos, Dimeresia − A. Gray
- ^ a b c d Jepson eFlora: Dimeresia howellii[permanent dead link]
- ^ Flora of North America, Dimeresia A. Gray
- ^ Biota of North America Program 2013 county distribution map
External links
- Calflora Database: Dimeresia howellii (Doublet)
- USDA Plants Profile for Dimeresia howellii (doublet)
- Jepson Manual eFlora (TJM2) treatment of Dimeresia howellii[permanent dead link]
- UC CalPhotos gallery of Dimeresia howellii (doublet)
 | This Heliantheae article is a stub. You can help Wikipedia by expanding it. |