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Montana Field Guide

Montana Field Guides

Glaucous Rattlesnake-root - Prenanthes racemosa

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
Stems erect, usually simple, 50–120 cm. Herbage glabrous; the stem hispid above. Leaf blades oblong below, lanceolate and sessile above, entire to dentate, 7–40 cm long. Inflorescence racemose to narrowly paniculate. Involucre 11–12 mm high; phyllaries setose. Ray flowers 9 to 29, white to pink ligules 7–13 mm long. Achenes 5–6 mm long; pappus yellowish (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are subspecies multiflora Cronquist.

Range Comments
BC to NL south to WA, CO, MO and NY (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Habitat

References
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Citation for data on this website:
Glaucous Rattlesnake-root — Prenanthes racemosa.  Montana Field Guide.  .  Retrieved on , from