Annuals, shallowly fibrous-rooted. Stems erect, straight at nodes, simple or branched at base, 5–15 cm, puberulent, hairs gland-tipped, glands often dark. Leaves mostly cauline, largest at mid-stem; petiole 4–8 mm, 1-veined, not winged; blade palmately 3-veined, ovate to elliptic-ovate, 6–17 × 4–9 mm, base attenuate, margins entire or dentate-serrate, teeth 1–2 per side, shallow, apex acute, surfaces puberulent, hairs gland-tipped, glands often dark, adaxial sometimes sparsely villous-glandular. Flowers herkogamous, 1–12, from proximal to distal nodes. Fruiting pedicels divergent-arcuate, 9–17 mm. Fruiting calyces oblong-ovoid, distinctly inflated, 8–10 mm, margins distinctly toothed or lobed, puberulent, hairs gland-tipped, glands often dark, lobes pronounced, erect. Corollas yellow and light pink to white, tube-throat yellow (inner and outer surfaces), lobes (limb) pink or white with pink distal borders, palate ridges yellow, throat floor and ridges weakly red-spotted, bilaterally symmetric, weakly bilabiate; tube-throat funnelform, 7–10 mm, exserted beyond calyx margin. Styles glabrous. Anthers included, glabrous. Capsules included, 6–8 mm.

Phenology: Flowering Jun–Jul(–Aug).
Habitat: Seeps over serpentine, wet meadows, roadsides.
Elevation: 1300–2000 m.

Distribution

• Generated Map
• Legacy Map

Calif.

Discussion

Erythranthe trinitiensis is similar to E. pulsiferae in its narrow leaves, glandular-puberulent vestiture, and weakly bilabiate corollas; it differs in its early-shed basal leaves, cauline leaves with one-veined petioles, and yellow corolla tubes and throats with pink lobes or lobe margins. The species is known only in Humboldt, Siskiyou, and Trinity counties.

Selected References

None.

Lower Taxa

None.