General:
Perennial herb from fibrous roots; stems creeping to 40 cm long, rooting at the nodes, often mat-forming, then ascending 5-25 cm tall, spreading-hairy.

Leaves:
Opposite, short-stalked, elliptic, 1.5-5 cm long, toothed, hairy on both surfaces.

Flowers:
Inflorescence of 1 to few, opposite, stalked, spike-like racemes arising from the axils of upper leaves, the racemes of several stalked flowers, the flower stalks 1-2 mm long, somewhat shorter than the alternate, narrowly lanceolate bracts; corollas light blue or lilac, saucer-shaped, 4-8 mm across, irregularly 4-lobed, the lobes much longer than the short tube, the lowest lobe narrower than the others; calyces hairy, 4-6 mm long, deeply 4-lobed, the lobes lanceolate, more or less equal; styles 3-4 mm long, exserted; stamens 2.

Fruits:
Capsules, 4 mm long, about as wide as long, flattened, broadly triangular or heart-shaped, scarcely to shallowly notched at the tip, hairy; seeds 6 to 12 per chamber, about 1 mm long.

Source:  The Illustrated Flora of British Columbia

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Illustration Source:  The Illustrated Flora of British Columbia