The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

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

small-flower monkeyflower

Habit Annuals, taprooted. Annuals, fibrous-rooted.
Stems

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

erect to ascending, simple or branched from base, 4-angled, 3–16 cm, glabrous.

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.

basal and cauline;

petiole: proximals 1–5 mm, mid cauline and distals 0 mm;

blade palmately 3-veined, broadly elliptic to ovate or broadly ovate, 6–20 × 6–12 mm, base rounded to cordate, margins subentire to denticulate, apex obtuse to acute or acuminate, surfaces sparsely villous.

Flowers

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

plesiogamous, 1–12, from proximal 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.

pale pink to rose pink or purple to magenta, throat sometimes yellow, lobes sometimes yellowish with pale rose spots, bilaterally symmetric, weakly bilabiate;

tube-throat cylindric, 5–9 mm, exserted beyond calyx margin;

limb expanded 5–6 mm.

Fruiting pedicels

2–18 mm.

5–15 mm, glabrous.

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.

campanulate, 6–9 mm, margins subtruncate, glabrous, lobes reduced, subequal.

Capsules

included, 3–8 mm.

included, 4–9 mm.

Anthers

included, glabrous.

included, minutely villous-hirsute.

Erythranthe rubella

Erythranthe inconspicua

Phenology Flowering Apr–Jun. Flowering Apr–Jun(–Jul).
Habitat Open slopes and washes. Steep, north- or northwest-facing slopes, canyon walls, moist talus, granitic sand on outcrops, moist gravelly open spots, sandy lakeshores, hillside streams or seeps, riparian woodlands, grassy slopes, gray pine, yellow pine, yellow pine-Kellogg oak, chaparral, Pseudotsuga-Pinus-Cornus, canyon live oak woodlands.
Elevation 300–3000 m. [1000–9800 ft.] 200–2100 m. [700–6900 ft.]
Distribution
from FNA
AZ; CA; CO; NM; NV; TX; UT; WY; Mexico (Baja California, Sonora)
[WildflowerSearch map]
from FNA
CA
[WildflowerSearch map]
Discussion

Erythranthe inconspicua occurs in Sierran counties from Kern north to El Dorado and then is apparently disjunct further northward to Butte County. A record from Los Angeles County (Bigelow s.n., 14 May 1854, the type of the species) is probably mislabeled, as other collections by Bigelow on the same day are from Calaveras County.

(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. 382. 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. 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. 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 inconspicuus
Name authority (A. Gray) N. S. Fraga: Phytoneuron 2012-39: 35. (2012) (A. Gray) G. L. Nesom: Phytoneuron 2012-39: 34. (2012)
Web links