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Montana Field Guide

Montana Field Guides

Short-spine Horsebrush - Tetradymia spinosa

Status Under Review

Global Rank: G5
State Rank: SU

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

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General Description
Spiny horse brush Plants to 100 cm tall. Stems spiny, tomentose, highly branched. Primary leaves converted to spines ca. 1 cm long; fascicled leaves linear, glabrous, 7–15 mm long. Inflorescence of axillary heads. Involucre 8–12 mm high; phyllaries 4 to 6, tomentose. Disk corollas 7–12 mm long. Achenes 6–8 mm long, densely puberulent (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Unknown/Undetermined
 


Range Comments
OR to MT south to CA, UT and NM (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 1

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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:
Short-spine Horsebrush — Tetradymia spinosa.  Montana Field Guide.  .  Retrieved on , from