Flora of North America species comparison

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Erythranthe rubella

Erythranthe corallina

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

coralline monkeyflower
Habit Annuals, taprooted. Perennials, rhizomatous, rhizomes often forming a mass, usually branching, filiform.
Stems

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

usually erect to ascending-erect, few-branched, 6–25(–38) cm, moderately hirsute to hirtellous, hairs deflexed.
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, becoming larger distally or even-sized;

petiole 0 mm or proximals 1–15 mm;

blade palmately 5-veined, ovate to broadly ovate, 15–45 mm, base mostly truncate to shallowly cordate, margins sharply dentate-serrate, apex obtuse, surfaces hirtellous to softly hirsute, hairs ascending, straight, dull gray, sharp-pointed, thick-walled, eglandular.
Flowers

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

herkogamous, 1–3(–6), commonly solitary or from distal nodes.
Styles

glabrous.

sparsely hirtellous.
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, red-spotted, bilaterally symmetric, bilabiate;

tube-throat narrowly funnelform to broadly cylindric, 13–20 mm, exserted beyond calyx margin;

limb expanded 12–22 mm.
Fruiting pedicels

2–18 mm.

(10–)25–75 mm, glabrous or puberulent proximally, hairs stipitate-glandular.
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.

sometimes purple-spotted, broadly cylindric-campanulate, inflated, sagittally compressed, 11–15 mm, glabrous, throat not closing, proximal lobe pair slightly upcurving.
Capsules

included, 3–8 mm.

included, stipitate, 7–10 mm.
Anthers

included, glabrous.

included, glabrous.
2n

= 48, 56.

Erythranthe rubella

Erythranthe corallina
Phenology Flowering Apr–Jun. Flowering (May–)Jun–Aug.
Habitat Open slopes and washes. Creek banks, moraine water courses, bogs, marshes, wet meadows, roadside ditches.
Elevation 300–3000 m. [1000–9800 ft.] (1400–)1700–2700(–3000) m. [(4600–)5600–8900(–9800) ft.]
Distribution
from FNA
AZ; CA; CO; NM; NV; TX; UT; WY; Mexico (Baja California, Sonora)
[WildflowerSearch map]
from FNA
CA; NV
Discussion

Erythranthe corallina is a morphologically consistent entity that occurs only in the Sierra Nevada of California and adjacent Nevada (Washoe County and Carson City). Its chromosome number is reported as 2n = 48 and 56, compared to 2n = 28 and 56 in E. tilingii; identities of the E. corallina vouchers should be rechecked and additional counts made, since the occurrence of such wide dysploidy seems unlikely. Compared to the leaf blades of E. tilingii in the strict sense, those of E. corallina are relatively broader (broadly ovate to orbicular-ovate), the plants generally taller, and long-pedicellate flowers occasionally are produced from mid stem or even proximal nodes. The hirsutulous to hirsute vestiture of eglandular hairs on both leaf surfaces is a reliably diagnostic feature and usually easily observed with a 10× lens.

Some plants of Erythranthe corallina from San Bernardino County, California, produce decumbent-ascending stems (4–10 cm) and ovate-triangular leaves (blade 5–10 × 3–6 mm), but the dense system of filiform rhizomes, flowers one to three, and hirtellous foliar vestiture serve to identify them.

(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. 410. 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. 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. 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 corallinus, M. minusculus, M. tilingii var. corallinus
Name authority (A. Gray) N. S. Fraga: Phytoneuron 2012-39: 35. (2012) (Greene) G. L. Nesom: Phytoneuron 2012-39: 44. (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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