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Montana Field Guide

Montana Field Guides

Sulphur-flowered Buckwheat - Eriogonum umbellatum


Global Rank: G5
State Rank: S5

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value:

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General Description
Perennial from a branched caudex forming loose mats. Flowering stems ascending to erect, 5–40 cm. Leaves basal, glabrous to tomentose; the blade oblanceolate to ovate, 3–30 mm long. Inflorescence an umbel of capitate cymes subtended by a whorl of leaf-like bracts; involucres tomentose, 4–8 mm long with 6 to 12 reflexed lobes. Flowers mostly unisexual, 4–8 mm long, white, yellow, or red, campanulate with a long, tubular base; tepals glabrous, similar in shape; stamens exserted. Achenes 2–7 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

In MT we have the following varieties: umbellatum, aureum (Gandog.) Reveal, deserticum Reveal, dichrocephalum Gandog., ellipticum (Nutt.) Reveal, and majus Hook.

Species Range
Present
 


Summary of Observations Submitted for Montana
Number of Observations: 244

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat

References
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Citation for data on this website:
Sulphur-flowered Buckwheat — Eriogonum umbellatum.  Montana Field Guide.  .  Retrieved on , from