Perennials, rhizomatous, rooting at proximal nodes. Stems erect, sometimes ascending to decumbent, simple or branched, (2–)5–20 cm, nodes 2–4(or 5), glabrate to glandular-villous, hairs 0.5–2 mm, gland-tipped, internodes evident. Leaves usually cauline, basal not persistent, distinctly separated; petiole 0 mm or (0.5–)1–5(–10) mm; blade pinnately veined, oblong-ovate to ovate, (10–)15–40(–50) × 5–25 mm, base obtuse-cuneate to truncate, rounded or subcordate, subclasping to sessile, margins coarsely serrate-dentate to denticulate or subentire, apex acute to obtuse, surfaces glabrate to glandular-villous. Flowers herkogamous, 1–8, from medial to distal nodes. Fruiting pedicels (7–)10–25 mm, glabrate to glandular-villous. Fruiting calyces ridge- to wing-angled, campanulate to cylindric-campanulate, weakly or not inflated, 6–13 mm, villous to glandular-villous, lobes erect to spreading-recurving, strongly unequal to subequal, triangular to linear-lanceolate or narrowly triangular-acuminate, 2–4 mm, apex acute to obtuse. Corollas yellow, throat with fine red to blackish or brown lines extending onto lobes, red to brown dots in throat and lobes present or absent, bilaterally or nearly radially symmetric, bilabiate or nearly regular; tube-throat narrowly funnelform, 11–18 mm, exserted beyond calyx margin; lobes oblong-obovate, apex rounded to notched. Styles glabrous. Anthers included, glabrous or slightly hirtellous to scabrous. Capsules included, 6–8 mm. 2n = 32.

Phenology: Flowering May–Aug.
Habitat: Springs and seeps, creek edges, moist meadows, ditches, along trails, roadsides, rocky ridges, granite outcrops, shaded and wet places in sagebrush, aspen, fir, spruce-fir, lodgepole pine forests, meadows.
Elevation: (300–)400–3100 m.

Distribution

• Generated Map
• Legacy Map

St. Pierre and Miquelon, B.C., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que., Calif., Colo., Conn., Idaho, Maine, Mass., Mich., Mont., Nev., N.H., N.J., N.Y., Oreg., Pa., R.I., Utah, Vt., Va., Wash., W.Va., Wis., Wyo., introduced in South America (Chile), Europe, e Asia (Japan), Pacific Islands (New Zealand), Australia.

Discussion

Earlier segregation of Erythranthe moniliformis as distinct from E. moschata (for example, G. L. Nesom 2012g) emphasized a primarily erect habit and tendency toward sessile to subsessile and more densely arranged cauline leaves in E. moniliformis versus a decumbent to procumbent habit and consistently petiolate leaves on longer internodes in E. moschata. Discontinuities in morphology, geography, and ecology were not confirmed in later study by Nesom (2017). Rhizomes with small, tuberlike swellings can be observed over the whole moschata/moniliformis range, and there apparently are no consistent distinctions in vestiture and corolla size.

Mimulus acutidens Reiche (1911), a later homonym of M. acutidens Greene, pertains here.

Selected References

None.

Lower Taxa

None.