Flora of North America species comparison

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Erythranthe geyeri

Erythranthe hymenophylla

Geyer's monkeyflower, mimule de James

thin-sepal monkeyflower
Habit Perennials, rhizomatous, rooting at nodes. Annuals, filiform-taprooted.
Stems

decumbent-ascending to ascending or erect-ascending, branched, (3–)10–40 cm, glabrous.

prostrate to ascending-erect, sharply bent at basal nodes, simple or few-branched, 5–25 cm, glandular-puberulent to glandular-villous, hairs 0.1–0.8 mm, vitreous, flattened, multicellular, gland-tipped.
Leaves

cauline, basal not persistent;

petiole 3–10(–20) mm or 0 mm distally;

blade palmately 3–5-veined, suborbicular to depressed-ovate or broadly elliptic-ovate to reniform, 6–25 mm, relatively even-sized or largest often at mid stem, bracteal reduced, base cuneate to truncate or subcordate, margins shallowly dentate to crenate-dentate, teeth 3–7(–10) per side, apex rounded, adaxial surface of distals sparsely short villous-glandular or glabrous.

basal and cauline, largest at mid stem;

petiole 6–30 mm;

blade pinnately veined, broadly lanceolate to ovate, 10–35 × 10–30 mm, distinctly membranous, base cuneate to shallowly cordate, margins coarsely dentate to shallowly denticulate or entire, apex acute to obtuse, surfaces glandular-puberulent to glandular-villous, hairs 0.1–0.8 mm, vitreous, flattened, multicellular, gland-tipped, glandular.
Flowers

plesiogamous, 2–8(–12), from distal nodes, sometimes from most nodes, very loosely racemose.

herkogamous, 1–6, from proximal to distal nodes.
Styles

glabrous.

glabrous.
Corollas

yellow, sparsely red-dotted or not, bilaterally symmetric, weakly bilabiate;

tube-throat cylindric-funnelform, 6–8 mm, exserted 1–3 mm beyond calyx margin;

limb expanded 5–8 mm.

light yellow, throat and abaxial lobes red- or purple-spotted, sometimes with small white patches, bilaterally symmetric, weakly bilabiate;

tube-throat funnelform, 10–14 mm, exserted beyond calyx margin;

lobes obovate-oblong, apex rounded to truncate or notched.
Fruiting pedicels

18–30 mm, sparsely short villous-glandular or glabrous.

divergent at right angles from stem, usually closely paired, 10–45 mm, negatively phototropic, causing capsules to be pressed against a cliff face or crevice at time of dehiscence, glandular-puberulent to glandular-villous, hairs 0.1–0.8 mm, vitreous, flattened, multicellular, gland-tipped.
Fruiting calyces

obtriangular to broadly obtriangular or deeply cupulate, inflated, sagittally compressed, (7–)8–12 mm, sparsely short villous-glandular or glabrous, throat not closing, lateral lobes shallowly convex-mucronulate, adaxial ovate with apex rounded.

angled, tubular-campanulate, slightly inflated, 5–7 mm, margins distinctly toothed or lobed, sparsely stipitate-glandular, lobes pronounced, erect.
Capsules

included, (4.5–)5–8 mm.

included, 3–6 mm.
Anthers

included, glabrous.

included, glabrous.
2n

= 30.

= 32.

Erythranthe geyeri

Erythranthe hymenophylla
Phenology Flowering May–Aug(–Oct). Flowering Apr–Aug(–Sep).
Habitat Edges of flowing streams, marsh edges, drainage ditches, seepage areas, springs, muddy or moist banks. Steep, seasonally moist, basalt cliffs with west or southwest exposure, mesic coniferous forests.
Elevation 200–2500 m. (700–8200 ft.) 800–1300 m. (2600–4300 ft.)
Distribution
from FNA
AZ; CO; IA; IL; KS; MI; MN; MO; NE; NM; OK; PA; SD; TX; WI; WY; AB; MB; ON; QC; SK; Mexico (Chihuahua, Coahuila, Distrito Federal, Durango, Hidalgo, Nuevo León, México, Querétaro, San Luis Potosí, Sonora, Veracruz, Zacatecas)
[WildflowerSearch map]
from FNA
ID; MT; OR
Discussion

Erythranthe geyeri has commonly been regarded as conspecific with E. glabrata (Kunth) G. L. Nesom (as Mimulus glabratus var. jamesii), but typical E. glabrata has a different chromosome number and distinct morphology and its range does not reach the United States. In Mexico, the two species are broadly sympatric without intermediates. An allozyme study of the M. glabratus complex (R. K. Vickery 1990) indicated that the Great Plains populations of E. geyeri are distinct from those in New Mexico and Mexico, corresponding to a difference in pedicel vestiture.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

In the protologue, R. J. Meinke observed that plants of Erythranthe hymenophylla have reflexed fruiting pedicels that increase seed dispersal back onto the vertical cliff wall, the characteristic habitat of the species. The hanging habit of E. hymenophylla is reflected in a sharp (90º to 180º) bend in the basal nodes and the long pedicels that are closely paired and divergent in parallel at about right angles from the stem. The species also is characterized by it very short calyx to corolla length, relatively short capsules, and large seeds.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 406. FNA vol. 17, p. 397.
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. 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. 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. 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
Synonyms Mimulus geyeri, M. glabratus var. fremontii, M. glabratus var. jamesii, M. glabratus var. oklahomensis, M. jamesii, M. jamesii var. fremontii Mimulus hymenophyllus
Name authority (Torrey) G. L. Nesom: Phytoneuron 2012-39: 43. (2012) (Meinke) 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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