Difference between revisions of "Eriogonum umbellatum var. aureum"

(Gandoger) Reveal

Taxon 17: 532. 1968.

Common names: Golden sulphur flower
Basionym: Eriogonum glaberrimum var. aureum Gandoger Bull. Soc. Roy. Bot. Belgique 42: 195. 1906
Synonyms: Eriogonum neglectum Greene Eriogonum umbellatum var. glabrum S. Stokes Eriogonum umbellatum var. intectum A. Nelson Eriogonum umbelliferum unknown
Treatment appears in FNA Volume 5. Treatment on page 340. Mentioned on page 338, 339, 341.
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Revision as of 20:09, 24 September 2019

Herbs, often rather compact mats, 1–3.5 × 2–6 dm. Aerial flowering stems erect, 1–2(–3) dm, thinly floccose or glabrous, without one or more leaflike bracts ca. midlength. Leaves in loose rosettes; blade usually elliptic, 1–2 × 0.5–1.5 cm, glabrous on both surfaces (except in central Idaho, where sparsely floccose even at full maturity), margins plane. Inflorescences umbellate; branches 0.3–2(–2.5) cm, without a whorl of bracts ca. midlength; involucral tubes 1.8–3 mm, lobes 1–3 mm. Flowers 4–7 mm; perianth bright yellow.


Phenology: Flowering Jun–Sep.
Habitat: Sandy to gravelly or occasionally rocky flats and slopes, mixed grassland and sagebrush communities, pinyon and/or juniper and montane conifer woodlands
Elevation: (1400-)1600-3200(-3400) m

Distribution

V5 677-distribution-map.gif

Colo., Idaho, Mont., Nev., Oreg., Utah, Wyo.

Discussion

Variety aureum is closely related to var. umbellatum, differing mainly in having glabrous leaf blades at full anthesis. However, var. aureum is much more widely distributed. At higher elevations, it is replaced by the weakly differentiated var. porteri. It is occasionally found in cultivation, especially in European gardens.

Selected References

None.

Lower Taxa

None.
James L. Reveal +
(Gandoger) Reveal +
Eriogonum glaberrimum var. aureum +
Golden sulphur flower +
Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +  and Wyo. +
(1400-)1600-3200(-3400) m +
Sandy to gravelly or occasionally rocky flats and slopes, mixed grassland and sagebrush communities, pinyon and/or juniper and montane conifer woodlands +
Flowering Jun–Sep. +
Illustrated +  and Endemic +
Eriogonum neglectum +, Eriogonum umbellatum var. glabrum +, Eriogonum umbellatum var. intectum +  and Eriogonum umbelliferum +
Eriogonum umbellatum var. aureum +
Eriogonum umbellatum +
variety +