Search Field Guide
Advanced Search
Montana Field Guide

Montana Field Guides

Nuttall's Larkspur - Delphinium nuttallianum
Other Names:  [including] Delphinium sutherlandii


Global Rank: G5
State Rank: S3S4

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

External Links






 
General Description
Stems glabrous to hairy, 15–60 cm from tuber-like roots. Leaves few, mostly on lower stem; blades 2–9 cm wide; ultimate lobes to 6 mm wide. Inflorescence 4- to 18-flowered; lower flowers shorter than pedicels. Flowers with spreading, deep blue sepals 10–15 mm long; the lower ones longer; petals white to sometimes bluish; the lower blades cleft 1/4 to 1/2-way to base. Fruits 10–18 mm, hairy (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Diagnostic Characteristics
Delphinium sutherlandii has been segragated from D. nuttallianum based mainly on characters of the lower lip petal, which appear to be continuous in our material. Hitchcock recognized D. nuttallianum var. fulvum which appears to correspond to Warnock's D. sutherlandii, but stated that it intergrades with typical D. nuttallianum. Recognition at the species level does not seem warranted at this time.

Delphinium nuttallianum, Nuttall’s Larkspur, is frequently confused with D. depauperatum, Slim Larkspur. Nuttall’s Larkspur, however, has pyramidal inflorescences, lower flowers shorter than their stalks (Lesica 2012), spreading fruits, and ringed seeds (FNA 1997). This contrasts with the cylindric inflorescences, lower flowers the same length or longer than their stalks (Lesica 2012), upright fruits, and winged seeds of Slim Larkspur (FNA 1997).

Species Range
Present
 


Range Comments
BC, AB south to CA, AZ, CO, and NE (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 6

(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
Vernally moist, sometimes shallow soil of meadows, grasslands, rock outcrops, open forest; valleys to alpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
Login Logout
Citation for data on this website:
Nuttall's Larkspur — Delphinium nuttallianum.  Montana Field Guide.  .  Retrieved on , from