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Montana Field Guide

Montana Field Guides

Bicknell's Geranium - Geranium bicknellii

Native Species

Global Rank: G5
State Rank: S4

Agency Status
MNPS Threat Rank:
C-value: 3

External Links

General Description
Annual or biennial. Stems erect, branched, 10–40 cm. Herbage sparsely hirsute, glandular in the inflorescence. Leaf blades 2–6 cm wide, 5- or 7-lobed; each lobe shallowly lobed. Flowers: sepals 4–7 mm long, lanceolate, bristle-tipped; petals 5–9 mm long, pink (white); fertile stamens 10. Capsule 15–25 mm long including the style column (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Diagnostic Characteristics
Taproot slender, leaves cleft nearly (but not completely) to the base; pedicels glandular villous, more than twice as long as the calyx at maturity, sepals with 2-4 mm long subulate tips, petals relatively small, anthers 1 mm or less, stylar beak of fruit 3-5 mm long.

Species Range
Montana Range


Range Comments
AK to NL south to CA, UT, CO, SD, IN and MA (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 140

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



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

Coniferous forest and (uncommonly) disturbed soil of streambanks, roadsides, often abundant for 2 to 4 years following fire; valleys, montane (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

  • Additional ReferencesLegend:   View Online Publication
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    • Alexander, E.J. 1933. Geranium bicknellii. Addisonia 18 (4):57-58. A33ALE01PAUS.
    • Britton, N. L. and A. B. Brown. 1913. An Illustrated Flora of the Northern United States, Canada, and the British Possessions. 2nd Edition in 3 Volumes. New York, NY: Charles Scribner's Sons. B13BRI01PAUS.
    • Fernald, M. L. 1950. Gray's manual of botany. Eighth edition. A handbook of the flowering plants and ferns of the central and northeastern United States and Adjacent Canada. American Book Co., New York.
    • Gleason, H. A., and A. Cronquist. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. New York Botanical Garden, Bronx, NY. 910 pp.
    • Gleason, H.A. 1952. New Britton & Brown. Illustrated Flora. Lancaster Press Inc. Lancaster, Pa. B52GLE01PAUS
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
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Citation for data on this website:
Bicknell's Geranium — Geranium bicknellii.  Montana Field Guide.  .  Retrieved on , from