Vascular Plants - Campanulaceae - Lobelia:
Lobelia dortmanna
Page Authors: Don Knoke, David Giblin
Dortmann's lobelia, water lobelia 
Blooms: June-August
Habit: herb
Duration: perennial
Origin: Native
Conservation Status: Threatened

Distribution: West of the Cascades in Washington; Vancouver Island and adjacent mainland in British Columbia, south to the Cascades of northern Oregon.
Habitat: In shallow water at the margins of ponds and lakes.
Species Description:

General: Aquatic, perennial herbs with fibrous roots, the stems hollow, upright, simple, up to 1 m. tall, the herbage glabrous throughout.
Leaves: Basal leaves in a rosette, linear, fleshy, hollow, curved, 2-8 cm. long; cauline leaves few, reduced to filiform bracts.
Flowers: Flowers few and well-spaced, single on curved pedicels; calyx lobes 5, deltoid, blunt, 1.5-2.5 mm. long; corolla two-lipped, pale blue or white, 1-2 cm. long, the lower lip deeply 3-lobed, the tube deeply split between the two upper lobes; filaments and anthers united into a tube, with two anthers shorter than the other three; ovary inferior.
Fruits: Capsule 2-celled, ellipsoid, 5-10 mm. long and 3-5 mm. wide.
Accepted Name:
Lobelia dortmanna L.

Treated in Flora of the PNW as:
Lobelia dortmanna
Additional Resources:

PNW Herbaria Specimens: View list of all Lobelia dortmanna specimens in the Consortium of Pacific Northwest Herbaria database.

WTU Herbarium Specimens: View list of Lobelia dortmanna specimens in the WTU Herbarium database.

Washington Flora Checklist: Lobelia dortmanna treatment.

E-Flora BC: Lobelia dortmanna atlas page.

CalPhotos: Lobelia dortmanna images.

USDA Plants Database: Lobelia dortmanna.
Additional photographs of Lobelia dortmanna:
(click on a thumbnail to view larger photo)

Mark Sheehan

Mark Sheehan

Jenifer Parsons, 2008

Jenifer Parsons, 2004
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Washington Native Plant Society
WA Native Plant Society