E-Flora BC: Electronic Atlas of the Flora of British Columbia

1. Stems trailing and rooting at the nodes, the branches rising less than 50 cm................S. hesperius

1. Stems erect, more or less branching, 0.3-3 m tall.


2. Corollas relatively long and narrow, the lobes not more than half the length of the tubes..............S. oreophilus

2. Corollas relatively short and wide, the lobes nearly equalling the tubes.


3. Styles elongate, exserted slightly from the corolla tube, usually long-hairy near the middle.............S. occidentalis

3. Styles short, not exserted from the corolla tube, glabrous.


Source: Illustrated Flora of British Columbia (Douglas et al. 1998)