Erythranthe exigua |
Erythranthe geyeri |
|
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eye strain monkeyflower, San Bernardino Mountains monkeyflower |
Geyer's monkeyflower, mimule de James |
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Habit | Annuals, taprooted. | Perennials, rhizomatous, rooting at nodes. |
Stems | erect, simple, sometimes branched near base, 2–10 cm, minutely stipitate-glandular. |
decumbent-ascending to ascending or erect-ascending, branched, (3–)10–40 cm, glabrous. |
Leaves | cauline; petiole 0 mm; blade 1-veined, obovate-oblong to narrowly elliptic, ovate, or narrowly ovate, 3–6 mm, base rounded to truncate or cuneate, margins entire or shallowly dentate, apex rounded, surfaces minutely stipitate-glandular. |
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. |
Flowers | plesiogamous, (1 or)2–6, from distal or medial to distal nodes. |
plesiogamous, 2–8(–12), from distal nodes, sometimes from most nodes, very loosely racemose. |
Styles | glabrous. |
glabrous. |
Corollas | light lavender to purple, abaxial lobe and palate ridges with yellow patches, bilaterally symmetric, ± bilabiate; tube-throat narrowly funnelform-cylindric, 1.5–2.5 mm, exserted 0.5 mm beyond calyx margin; lobes spreading. |
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 | divergent-spreading, 15–20 mm, minutely stipitate-glandular. |
18–30 mm, sparsely short villous-glandular or glabrous. |
Fruiting calyces | campanulate, 2–2.5 mm, minutely stipitate-glandular. |
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. |
Capsules | distinctly exserted, 3–4 mm. |
included, (4.5–)5–8 mm. |
Stigmas | persistent in fruit. |
|
Anthers | included, glabrous. |
included, glabrous. |
2n | = 30. |
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Erythranthe exigua |
Erythranthe geyeri |
|
Phenology | Flowering Jun–Jul. | Flowering May–Aug(–Oct). |
Habitat | Gentle slopes, along small streams, vernal creeks, pebble plains, openings in Jeffrey pine-juniper forests, runoff areas, vernal depressions, roadsides. | Edges of flowing streams, marsh edges, drainage ditches, seepage areas, springs, muddy or moist banks. |
Elevation | 1800–2400(–2600) m. (5900–7900(–8500) ft.) | 200–2500 m. (700–8200 ft.) |
Distribution |
CA; Mexico (Baja California)
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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)
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Discussion | Plants of Erythranthe exigua are diminutive annuals with few nodes and greatly reduced leaves, corollas, and calyces, wide spreading pedicels, and lavender flowers with small but bilabiate limbs. The species is known only from the San Bernardino Mountains of San Bernardino County and in adjacent Mexico. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
Source | FNA vol. 17, p. 406. | FNA vol. 17, p. 406. |
Parent taxa | Phrymaceae > Erythranthe | Phrymaceae > Erythranthe |
Sibling taxa | ||
Synonyms | Mimulus exiguus | Mimulus geyeri, M. glabratus var. fremontii, M. glabratus var. jamesii, M. glabratus var. oklahomensis, M. jamesii, M. jamesii var. fremontii |
Name authority | (A. Gray) G. L. Nesom & N. S. Fraga: Phytoneuron 2012-39: 42. (2012) | (Torrey) G. L. Nesom: Phytoneuron 2012-39: 43. (2012) |
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