Erythranthe latidens |
Erythranthe hymenophylla |
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broad-tooth monkeyflower |
thin-sepal monkeyflower |
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Habit | Annuals, fibrous-rooted or filiform-taprooted. | Annuals, filiform-taprooted. |
Stems | ascending to ascending-erect, geniculate at nodes, usually many-branched from base, 3–10(–25) cm, short stipitate-glandular or sessile-glandular, hairs 0.1–0.3 mm, gland-tipped. |
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 | basal and cauline, largest at base or near mid stem, sometimes unreduced in size up to distalmost nodes; petiole 0 mm; cauline blade palmately 3(–5)-veined, ovate to ovate-lanceolate, 8–26(–35) mm, base abruptly cuneate to rounded, sometimes subauriculate, margins entire or barely mucronulate to shallowly dentate-mucronulate, teeth or mucronulae 1–3 per side, apex acute to rounded, surfaces short stipitate-glandular or sessile-glandular, hairs 0.1–0.3 mm, gland-tipped. |
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, (1–)3–12, from medial to distal nodes. |
herkogamous, 1–6, from proximal to distal nodes. |
Styles | glabrous. |
glabrous. |
Corollas | white to pinkish or flesh colored, rarely yellowish, throat and abaxial lobes red-spotted, nearly radially symmetric; tube-throat cylindric, 5–6(–8) mm, exserted beyond calyx margin; limb barely widened, lobes broadly obovate, apex rounded. |
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 | straight, 11–28 mm, short stipitate-glandular or sessile-glandular, hairs 0.1–0.3 mm, gland-tipped. |
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 | purplish, prominently 5-angled, tubular-campanulate or ovoid-ellipsoid, strongly inflated, 8–12 mm, margins distinctly toothed or lobed, short stipitate-glandular or sessile-glandular, hairs 0.1–0.3 mm, gland-tipped, lobes pronounced, erect. |
angled, tubular-campanulate, slightly inflated, 5–7 mm, margins distinctly toothed or lobed, sparsely stipitate-glandular, lobes pronounced, erect. |
Capsules | included, 6–7 mm. |
included, 3–6 mm. |
Anthers | included, glabrous. |
included, glabrous. |
2n | = 32. |
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Erythranthe latidens |
Erythranthe hymenophylla |
|
Phenology | Flowering Apr–Jun. | Flowering Apr–Aug(–Sep). |
Habitat | Drained flats or slopes subject to vernal inundation, depressions in open fields, bare clay soils, vacant lots, roadsides. | Steep, seasonally moist, basalt cliffs with west or southwest exposure, mesic coniferous forests. |
Elevation | 10–800 m. (0–2600 ft.) | 800–1300 m. (2600–4300 ft.) |
Distribution |
CA; OR; Mexico (Baja California)
|
ID; MT; OR |
Discussion | The distinction between Erythranthe latidens and E. inflatula sometimes seems arbitrary, perhaps because of gene exchange where they are sympatric in northwestern California. Erythranthe latidens in Oregon is known only from southern Harney County. (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. 400. | FNA vol. 17, p. 397. |
Parent taxa | Phrymaceae > Erythranthe | Phrymaceae > Erythranthe |
Sibling taxa | ||
Synonyms | Mimulus inconspicuus var. latidens, M. latidens | Mimulus hymenophyllus |
Name authority | (A. Gray) G. L. Nesom: Phytoneuron 2012-39: 38. (2012) | (Meinke) G. L. Nesom: Phytoneuron 2012-39: 38. (2012) |
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