Flora of North America species comparison

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Erythranthe rubella

Erythranthe moschata

little redstem monkeyflower, red stem himulus, redstem monkeyflower, redstem or little redstem monkeyflower

mimule musqué, musk monkeyflower, musk-flower, musk-plant, sticky monkey-flower
Habit Annuals, taprooted. Perennials, rhizomatous, rooting at proximal nodes.
Stems

erect, simple, sometimes branched from basal nodes, 3–32 cm, minutely puberulent.

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

cauline, basal not persistent;

petiole 0 mm;

blade palmately 3-veined (in broader ones), linear to elliptic, 5–22(–30) × 1–5 mm, base narrowed, margins entire, sometimes toothed, apex acute to obtuse, surfaces minutely puberulent.

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, sometimes plesiogamous, 1–106, from distal or medial to distal nodes.

herkogamous, 1–8, from medial to distal nodes.
Styles

glabrous.

glabrous.
Corollas

yellow and abaxial limb and throat red dotted or pink to purple and throat yellow, bilaterally symmetric, weakly bilabiate;

tube-throat cylindric, 4–10 mm, exserted beyond calyx margin;

limb expanded 3–5 mm, lobes entire or weakly notched, abaxial limb glabrous.

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.
Fruiting pedicels

2–18 mm.

(7–)10–25 mm, glabrate to glandular-villous.
Fruiting calyces

becoming red-angled or red, campanulate to nearly cylindric, 4–9 mm, margins distinctly toothed or lobed, glabrous or minutely puberulent, ribs thickened, lobes pronounced, erect, margins ciliate.

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.
Capsules

included, 3–8 mm.

included, 6–8 mm.
Anthers

included, glabrous.

included, glabrous or slightly hirtellous to scabrous.
2n

= 32.

Erythranthe rubella

Erythranthe moschata
Phenology Flowering Apr–Jun. Flowering May–Aug.
Habitat Open slopes and washes. 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 300–3000 m. [1000–9800 ft.] (300–)400–3100 m. [(1000–)1300–10200 ft.]
Distribution
from FNA
AZ; CA; CO; NM; NV; TX; UT; WY; Mexico (Baja California, Sonora)
[WildflowerSearch map]
from FNA
CA; CO; CT; ID; MA; ME; MI; MT; NH; NJ; NV; NY; OR; PA; RI; UT; VA; VT; WA; WI; WV; WY; BC; NB; NF; NS; ON; PE; QC; SPM [Introduced in South America (Chile), Europe, e Asia (Japan), Pacific Islands (New Zealand), Australia]
[WildflowerSearch map]
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.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 384. Treatment authors: Guy L. Nesom, Naomi S. Fraga. FNA vol. 17, p. 401. Treatment authors: Guy L. Nesom, Naomi S. Fraga.
Parent taxa Phrymaceae > Erythranthe Phrymaceae > Erythranthe
Sibling taxa
E. acutidens, E. alsinoides, E. ampliata, E. androsacea, E. arenaria, E. arenicola, E. arvensis, E. barbata, E. bicolor, E. brachystylis, E. breviflora, E. breweri, E. caespitosa, E. calcicola, E. calciphila, E. cardinalis, E. carsonensis, E. charlestonensis, E. chinatiensis, E. cinnabarina, E. corallina, E. cordata, E. decora, E. dentata, E. diffusa, E. discolor, E. eastwoodiae, E. erubescens, E. exigua, E. filicaulis, E. filicifolia, E. floribunda, E. gemmipara, E. geniculata, E. geyeri, E. glaucescens, E. gracilipes, E. grandis, E. grayi, E. guttata, E. hallii, E. hardhamiae, E. hymenophylla, E. inamoena, E. inconspicua, E. inflatula, E. jungermannioides, E. laciniata, E. latidens, E. lewisii, E. linearifolia, E. marmorata, E. michiganensis, E. microphylla, E. minor, E. montioides, E. moschata, E. nasuta, E. norrisii, E. nudata, E. palmeri, E. pardalis, E. parishii, E. parvula, E. patula, E. percaulis, E. primuloides, E. ptilota, E. pulsiferae, E. purpurea, E. regni, E. rhodopetra, E. scouleri, E. shevockii, E. sierrae, E. suksdorfii, E. taylorii, E. thermalis, E. tilingii, E. trinitiensis, E. unimaculata, E. utahensis, E. verbenacea, E. washingtonensis, E. willisii, E. veronicifolia
E. acutidens, E. alsinoides, E. ampliata, E. androsacea, E. arenaria, E. arenicola, E. arvensis, E. barbata, E. bicolor, E. brachystylis, E. breviflora, E. breweri, E. caespitosa, E. calcicola, E. calciphila, E. cardinalis, E. carsonensis, E. charlestonensis, E. chinatiensis, E. cinnabarina, E. corallina, E. cordata, E. decora, E. dentata, E. diffusa, E. discolor, E. eastwoodiae, E. erubescens, E. exigua, E. filicaulis, E. filicifolia, E. floribunda, E. gemmipara, E. geniculata, E. geyeri, E. glaucescens, E. gracilipes, E. grandis, E. grayi, E. guttata, E. hallii, E. hardhamiae, E. hymenophylla, E. inamoena, E. inconspicua, E. inflatula, E. jungermannioides, E. laciniata, E. latidens, E. lewisii, E. linearifolia, E. marmorata, E. michiganensis, E. microphylla, E. minor, E. montioides, E. nasuta, E. norrisii, E. nudata, E. palmeri, E. pardalis, E. parishii, E. parvula, E. patula, E. percaulis, E. primuloides, E. ptilota, E. pulsiferae, E. purpurea, E. regni, E. rhodopetra, E. rubella, E. scouleri, E. shevockii, E. sierrae, E. suksdorfii, E. taylorii, E. thermalis, E. tilingii, E. trinitiensis, E. unimaculata, E. utahensis, E. verbenacea, E. washingtonensis, E. willisii, E. veronicifolia
Synonyms Mimulus rubellus, M. gratioloides Mimulus moschatus, E. inodora, E. moniliformis, M. crinitus, M. guttatus var. moschatus, M. inodorus, M. leibergii, M. macranthus, M. moniliformis, M. moschatus var. longiflorus, M. moschatus var. moniliformis, M. moschatus var. pallidiflorus
Name authority (A. Gray) N. S. Fraga: Phytoneuron 2012-39: 35. (2012) (Douglas ex Lindley) G. L. Nesom: Phytoneuron 2012-39: 38. (2012)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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