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Montana Field Guide

Montana Field Guides

Gairdner's Yampah - Perideridia gairdneri


Global Rank: G5
State Rank: S4

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 4

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General Description
Perennial with tuberous roots. Stems erect, 30–80 cm. Herbage glabrous. Leaves cauline, long-petiolate; blades pinnate; leaflets linear to filiform, 4–12 cm long, often withered at flowering. Umbel compound; peduncle 3–10 cm long; rays 1–5 cm long; involucral bracts linear, 1–4 mm long or absent; involucel bracts ca. 1 mm long. Flowers white; sepals present; stylopodium conic. Mericarps glabrous, hemispheric, 2–3 mm long; ribs raised but not winged; oil tubes solitary in the intervals (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Lesica (2012) treats this species as Perideridia montana (Blank.) Dorn.

Species Range
Present
 


Range Comments
BC to SK south to CA and SD (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 65

(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
Grasslands, meadows, woodlands; valleys to lower subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Gairdner's Yampah — Perideridia gairdneri.  Montana Field Guide.  .  Retrieved on , from