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Eriogonum brachyanthum Coville  

No occurrences found

Family: Polygonaceae
shortflower buckwheat
[Eriogonum baileyi var. brachyanthum (Coville) Jeps.]
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James L. Reveal in Flora of North America (vol. 5)
Herbs, spreading, (0.5-)1-3 dm, glabrous, greenish. Stems: aerial flowering stems erect, 0.3-0.8 dm, glabrous. Leaves basal; petiole 0.5-3 cm, tomentose; blade ovate to rounded, 0.5-2 × 0.5-2 cm, densely white-tomentose on both surfaces, rarely glabrate and grayish or greenish adaxially. Inflorescences cymose, occasionally distally uniparous due to suppression of secondary branches, usually diffuse, 5-25 × 5-30 cm; branches glabrous; bracts 0.5-2 × 0.5-2 mm. Peduncles absent. Involucres somewhat appressed to branches, turbinate, 1-1.2 × 0.4-0.6 mm, glabrous; teeth 5, erect, 0.2-0.3 mm. Flowers 0.6-0.8(-1) mm; perianth yellow or pale yellowish, rarely whitish, glabrous; tepals slightly dimorphic, those of outer whorl oblong to oblong-obovate, those of inner whorl narrowly oblong; stamens included, 0.5-0.8 mm; filaments pilose proximally. Achenes dark brown, 3-gonous, 0.8-1 mm. Flowering Apr-Nov. Sandy to gravelly flats, washes, and slopes, saltbush, greasewood, and sagebrush communities, pinyon-juniper and montane conifer woodlands; 600-2300 m; Calif., Nev., Oreg. Eriogonum brachyanthum basically is a species of the Mojave Desert, extending northward in eastern California (Inyo, Kern, Los Angeles, Mono, Riverside, and San Bernardino counties) and along the Lahontan Trough of Nevada (Churchill, Esmeralda, Eureka, Humboldt, Lander, Lyon, Mineral, Nye, Pershing, and Washoe counties) to just north of Denio in Harney County, Oregon. It is common to abundant and even locally weedy in the northern Mojave Desert. Elsewhere it is less common and much more widely scattered. It often is found with other annual wild buckwheats forming dense patches (especially along highways) composed of several (up to seven in places) species, and care must be taken to sort them properly when making herbarium specimens.

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