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Montana Field Guide

Montana Field Guides

Pale-spiked Lobelia - Lobelia spicata

Species of Concern

Global Rank: G5
State Rank: S2?
* (see State Rank Reason below)

Agency Status
MNPS Threat Rank:
C-value: 7

External Links

State Rank Reason (see State Rank above)
Rare and peripheral in Montana, where it is known from a few locations in the northeast corner of the state. Additional data on population levels and trends are needed. Unclear if any of the documented occurrences are subject to negative impacts or disturbances.
General Description
Pale-spiked Lobelia is an herbaceous perennial with unbranched stems that are 2-8 dm high. The oblong, lance-shaped leaves are 5-10 cm long, have toothed margins and short petioles, and become smaller up the stem. Foliage is glabrous to sparsely short-hairy. Flowers are 7-12 mm long and are born on short, 2-5 mm long stalks in a sparingly branched, narrow, crowded inflorescence. Each flower has 5 narrow sepals that are 5-9 mm long and a light blue, tubular, 4-10 mm long corolla that flares into a spreading 2-lobed upper lip and a 3-lobed lower lip. The ovary is below the base of the corolla and matures into a nearly globose capsule that is 3-5 mm high.

Flowering in late July - early August.

Diagnostic Characteristics
Lobelia kalmii is confined to very wet soils. Other species of Campanulaceae with Lobelia-like flowers are annuals and are usually found in wetlands.

Species Range

Range Comments
SK to QC, south to TX, LA, MS and GA (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 12

(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)

Moist meadows on the plains.

Ecological Systems Associated with this Species

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Citation for data on this website:
Pale-spiked Lobelia — Lobelia spicata.  Montana Field Guide.  .  Retrieved on , from