Erythranthe bicolor

Annuals, taprooted. Stems erect, simple or branched from basal nodes, 4–30 cm, densely glandular-puberulent, hairs 0.05–0.1 mm, gland-tipped. Leaves cauline, basal not persistent; petiole 0 mm or short-attenuate; blade 1-veined or palmately 3-veined (in broader ones), narrowly elliptic to linear-lanceolate or linear-oblanceolate, 10–30 × 2–6 mm at mid-stem, base attenuate, margins entire or remotely shallowly dentate to mucronulate, teeth 1–4 per side, apex acute, surfaces densely glandular-puberulent, hairs 0.05–0.1 mm, gland-tipped. Flowers herkogamous, 2–8, from medial to distal nodes. Fruiting pedicels (5–) 7–20 (–30) mm, densely glandular-puberulent, hairs 0.05–0.1 mm, gland-tipped. Fruiting calyces red-dotted, strongly angled, cylindric-campanulate, (5–) 7–12 mm, margins distinctly toothed or lobed, densely glandular-puberulent, hairs 0.05–0.1 mm, gland-tipped, ribs corky, lobes pronounced, spreading. Corollas yellow, adaxial lip white, sometimes yellow, throat and abaxial limb red-spotted, bilaterally symmetric, weakly bilabiate; tube-throat funnelform, 8–12 mm, exserted beyond calyx margin; limb broadly expanded, lobes 2-fid, palate villous. Styles minutely glandular. Anthers included, margins ciliate, glabrous. Capsules included, 4–6 mm.

Phenology: Flowering Apr–Jun.
Habitat: Moist banks, serpentine and granite outcrops, seepage areas, volcanic mudflows, open red clay exposures.
Elevation: (100–)400–1700(–2500) m.

Calif.

Discussion

Erythranthe bicolor ranges from Shasta and Trinity counties south to Tulare County; the identity of apparently disjunct populations in San Bernardino County needs to be reexamined.

Selected References

None.

Lower Taxa