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Montana Field Guide

Montana Field Guides

Tall Larkspur - Delphinium occidentale
Other Names:  Delphinium × occidentale, Delphiunium barbeyi × Delphinium glaucum


Global Rank: G4
State Rank: S4

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 3

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General Description
Stems glabrous, glaucous, hollow, 60–120 cm from deep fibrous roots. Leaves numerous; blades 5–15 cm wide; ultimate lobes to 15 mm wide, mucronate. Inflorescence with more than 25 flowers, often branched with lower flowers bracteate, longer than pedicels. Flowers with purple to white, puberulent sepals 6–12 mm long, pointing forward; petals blue to whitish, the lower barely cleft. Fruits 10–16 mm long, puberulent (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


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

Summary of Observations Submitted for Montana
Number of Observations: 10

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Relative Density

Recency

 

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



Habitat
Meadows, moist grasslands, steppe; montane, subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Tall Larkspur — Delphinium occidentale.  Montana Field Guide.  .  Retrieved on , from