Flora of North America species comparison

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Erythranthe geyeri

Phrymaceae

Geyer's monkeyflower, mimule de James

lop-seed family, monkeyflower family
Habit Perennials, rhizomatous, rooting at nodes. Herbs, subshrubs, or shrubs, annual or perennial, aquatic or terrestrial, sometimes fleshy, autotrophic.
Stems

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

erect or ascending to prostrate, 4-angled, sometimes winged.
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.

deciduous or persistent, basal and cauline or all cauline, rarely subrosulate or rosulate (Erythranthe), opposite, or alternate distally, simple;

stipules absent;

petiole present or absent;

blade fleshy, semi-fleshy, or not, not leathery, margins entire or toothed.
Inflorescences

terminal and axillary racemes or flowers solitary (Glossostigma, some Erythranthe, some annual plants);

flowers erect to nodding or strongly reflexed and appressed to inflorescence axis (Phryma).
Flowers

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

bisexual, perianth and androecium hypogynous;

sepals (3 or)4 or 5, proximally connate, calyx radially or bilaterally symmetric;

petals 3–5, proximally connate, corolla bilaterally symmetric, rarely nearly radially in reduced forms, strongly to weakly bilabiate, rarely nearly regular, salverform to tubular-funnelform, funnelform, campanulate, or compressed;

stamens (2–)4, adnate to corolla, didynamous [both pairs of equal length in autogamous forms], staminode 0;

pistil 1, 2-carpellate, ovary superior, (1 or)2-locular, placentation axile, basal (Phryma), or parietal (Diplacus, Mimetanthe);

ovules anatropous or orthotropous (Phryma), unitegmic, tenuinucellate;

style 1;

stigma 1, 2-lobed.
Styles

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.

Fruiting pedicels

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

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.

Fruits

capsules, dehiscence loculicidal [septicidal or irregular], or achenes [berry].
Capsules

included, (4.5–)5–8 mm.

Seeds

1–2000, yellowish brown or brown, narrowly ellipsoid, slightly flattened bilaterally;

embryo straight, endosperm sparse.
Anthers

included, glabrous.

2n

= 30.

Erythranthe geyeri

Phrymaceae
Phenology Flowering May–Aug(–Oct).
Habitat Edges of flowing streams, marsh edges, drainage ditches, seepage areas, springs, muddy or moist banks.
Elevation 200–2500 m. (700–8200 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]
North America; Mexico; Central America; w South America (primarily Andean); s Asia (India); se Asia; e Africa; Indian Ocean Islands (Madagascar); Pacific Islands (New Zealand); Australia [Introduced in Europe, s Africa]
[BONAP county map]
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.)

Genera 13, species ca. 200 (6 genera, 139 species in the flora).

Over one half of the species in Phrymaceae are members of Diplacus and Erythranthe and together include over 160 species; all other genera each have seven or fewer species.

Until recently, Phrymaceae consisted only of Phryma leptostachya, a taxonomically isolated species of eastern North America and eastern Asia. Molecular studies have established a relationship not with the Verbenaceae, as was earlier postulated (see H. L. Whipple 1972; R. Venkata Ramana et al. 2000), but rather with Mimulus and other genera, suggesting that Phrymaceae should be enlarged. The sequence of genera in Phrymaceae here follows the phylogeny proposed by P. M. Beardsley and R. G. Olmstead (2002).

One of the major lineages of Phrymaceae is primarily a Southern Hemisphere group ranging from Australia and New Zealand to southeastern and south Asia (India), Madagascar, and South Africa. Mimulus in the narrow sense, including the two endemic North American species, is part of this group, which includes 24 species in seven genera. The largest major lineage includes 158 species in five genera from North America, South America, and southeast Asia. This lineage includes two genera from Mexico and Central America: Hemichaena Bentham, which is sister to the North American Diplacus and Mimetanthe, and Leucocarpus D. Don, which is sister to the American and Asian Erythranthe.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Plants aquatic or semi-aquatic, mat-forming.
→ 2
2. Stems functionally stolons, leaves on stolons; sepals 3; leaf blades fleshy.
Glossostigma
2. Stems prostrate to decumbent or erect; sepals 5, sometimes 3 in reduced forms; leaf blades sometimes thickened or semi-fleshy.
Erythranthe
1. Plants terrestrial or, if semi-aquatic, not mat-forming.
→ 3
3. Flowers strongly reflexed and appressed to inflorescence axes in fruit; fruits achenes; bracteoles present.
Phryma
3. Flowers lateral or erect to nodding, not strongly reflexed and appressed in fruit; fruits capsules; bracteoles absent.
→ 4
4. Fruit apices rounded to truncate; placentation axile.
→ 5
5. Leaf venation brochidodromous; stamens adnate to middle of corolla.
Mimulus
5. Leaf venation acrodromous (veins usually basal only, sometimes basal and suprabasal); stamens adnate proximal to middle of corolla.
Erythranthe
4. Fruit apices attenuate; placentation parietal.
→ 6
6. Pedicels ± equal to or slightly longer than calyces; calyx lobe midveins low-rounded, not wing-angled; fruit walls densely pustulate-glandular.
Mimetanthe
6. Pedicels nearly absent or shorter than calyces, rarely ± equal to or slightly longer than calyces; calyx lobe midveins angled or wing-angled; fruit walls smooth, eglandular.
Diplacus
Source FNA vol. 17, p. 406. FNA vol. 17, p. 365. Authors: Richard K. Rabeler, Craig C. Freeman, Wayne J. Elisens.
Parent taxa 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
Subordinate taxa
Diplacus, Erythranthe, Glossostigma, Mimetanthe, Mimulus, Phryma
Synonyms Mimulus geyeri, M. glabratus var. fremontii, M. glabratus var. jamesii, M. glabratus var. oklahomensis, M. jamesii, M. jamesii var. fremontii
Name authority (Torrey) G. L. Nesom: Phytoneuron 2012-39: 43. (2012) Schauer
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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