Diplacus graniticola |
Diplacus bigelovii |
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granite-crack monkeyflower |
Bigelow mimulus, Bigelow's monkeyflower |
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Habit | Herbs, annual, herbage usually drying dark. | Herbs, annual, herbage usually drying dark. | ||||
Stems | erect, 60–120(–150) mm, nodes 4–15(–20), internodes shorter than leaves, glandular-villous with gland-tipped hairs 1–1.6 mm. |
erect, (10–)20–250(–320) mm, nodes 3–6, internodes 1–6 mm, glandular-pubescent to glandular-villous. |
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Leaves | usually cauline, relatively even-sized; petiole weakly delimited; blade usually lanceolate to ovate-lanceolate, 20–40 × 4–12 mm, margins entire, rarely toothed, plane, apex rounded to obtuse or acute, surfaces: proximals often glabrate abaxially, distals glandular-villous. |
usually cauline, relatively even-sized or reduced distally; petiole absent, bases of largest leaves often long-tapered to petiole-like extensions; blade obovate, elliptic, or oblanceolate, (5–)7–35(–50) × (2–)3–18(–26) mm, margins entire, rarely toothed, plane, apex abruptly acuminate, acute-acuminate, or cuspidate to long-tapering or long-acuminate, surfaces glandular-pubescent. |
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Pedicels | 1–3 mm in fruit. |
1–4(–8) mm in fruit. |
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Flowers | 2 per node, or 1 or 2 per node on 1 plant, chasmogamous. |
2 per node, or 1 or 2 per node on 1 plant, chasmogamous. |
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Styles | glandular-puberulent. |
glandular-puberulent. |
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Corollas | nearly white or pale lavender to pinkish or pale to dark magenta, each lobe with a dark medial line extending nearly to tip, throat with a dark red or purple splotch at junction of each abaxial lobe and adjacent lateral lobe, throat floor sometimes with 2 adjacent white splotches at lateral lobe bases, palate ridges yellow, tube-throat 15–20 mm, limb 10–16 mm diam., bilabiate. |
magenta with dark reddish spot on each side of mouth on interior lateral walls of throat, usually with reddish lines extending from throat onto midveins of lobes, throat floor yellow with reddish speckling and variable reddish markings, palate ridges yellow, tube-throat (9–)12–22 mm, limb 12–24 mm diam., not bilabiate. |
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Calyces | symmetrically attached to pedicels, not inflated in fruit, 8–12 mm, glandular-villous, tube strongly plicate, lobes triangular, subequal, apex acute, ribs narrow, darkened, blackish, thickened, strongly raised, intercostal areas green to purple, not membranous. |
symmetrically attached to pedicels, inflated in fruit, 6–13(–15) mm, glandular-pubescent, tube strongly plicate, lobes slightly recurved, narrowly triangular, subequal, often slightly indurate, apex acuminate to attenuate, ribs broad, darkened, blackish, thickened, strongly raised, intercostal areas whitish, membranous. |
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Capsules | 6–10 mm. |
(6–)7–13(–15) mm. |
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Anthers | included, ciliate. |
included, glabrous, sometimes ciliate. |
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Stigmas | included, lobes unequal, abaxial 1.5 times adaxial. |
included, lobes equal. |
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2n | = 16. |
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Diplacus graniticola |
Diplacus bigelovii |
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Phenology | Flowering Apr–Sep. | |||||
Habitat | Granite cracks and crevices. | |||||
Elevation | 300–2100 m. (1000–6900 ft.) | |||||
Distribution |
CA
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AZ; CA; NV; UT
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Discussion | Diplacus graniticola occurs in the Sierra Nevada from Tuolumne County to northern Tulare County. These plants previously were identified within D. layneae, with which they are partially sympatric; where these two occur together, D. layneae often grows in granite-derived sand and gravel immediately adjacent to the granite rock habitat of D. graniticola. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 2 (2 in the flora). Diplacus bigelovii is distributed in southeastern California from southern Mono County south to Imperial and San Diego counties through southern Nevada into Washington County, Utah, and La Paz and Mohave counties, Arizona. The relatively sharp line dividing the two varieties roughly follows the Inyo-San Bernardino county line, then cuts across Clark County, Nevada, and Mojave County, Arizona. Diplacus bigelovii can generally be recognized by its relatively large, nearly radially symmetric corollas, included stigmas, and inflated mature calyces with lobes of unequal length and apices acuminate-attenuate. The two varieties have distinctive leaf shapes; D. M. Thompson (2005) reported them as very closely parapatric and exhibiting limited intergradation near their contiguous occurrence. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 17, p. 438. | FNA vol. 17, p. 434. | ||||
Parent taxa | Phrymaceae > Diplacus | Phrymaceae > Diplacus | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Eunanus bigelovii, Mimulus bigelovii | |||||
Name authority | Schoenig: Phytoneuron 2017-24: 1, figs. 1, 3–10. (2017) | (A. Gray) G. L. Nesom: Phytoneuron 2012-39: 28. (2012) | ||||
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