Erythranthe bicolor

(Hartweg ex Bentham) G. L. Nesom & N. S. Fraga

Phytoneuron 2012-39: 36. 2012.

Common names: Yellow and white monkeyflower
Endemic
Basionym: Mimulus bicolor Hartweg ex Bentham Pl. Hartw., 328. 1849
Treatment appears in FNA Volume 17. Treatment on page 390. Mentioned on page 379, 391.

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.

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

None.
... more about "Erythranthe bicolor"
Guy L. Nesom +  and Naomi S. Fraga +
(Hartweg ex Bentham) G. L. Nesom & N. S. Fraga +
Mimulus bicolor +
Yellow and white monkeyflower +
(100–)400–1700(–2500) m. +
Moist banks, serpentine and granite outcrops, seepage areas, volcanic mudflows, open red clay exposures. +
Flowering Apr–Jun. +
Phytoneuron +
Mimulus sect. Erythranthe +  and Mimulus subg. Synplacus +
Erythranthe bicolor +
Erythranthe +
species +