Diplacus bigelovii |
Diplacus viscidus |
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Bigelow mimulus, Bigelow's monkeyflower |
sticky monkeyflower, viscid monkeyflower |
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Habit | Herbs, annual, herbage usually drying dark. | Herbs, annual. | ||||
Stems | erect, (10–)20–250(–320) mm, nodes 3–6, internodes 1–6 mm, glandular-pubescent to glandular-villous. |
erect, (30–)60–370 mm, densely glandular-pubescent with viscid hairs. |
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Leaves | 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. |
usually cauline, relatively even-sized or largest proximally and gradually reduced distally; petiole absent; blade obovate to narrowly elliptic, (4–)8–54(–70) × (2–)3–23 mm, margins entire or serrate, plane, apex obtuse to rounded, surfaces: proximals glabrous abaxially, distals glandular-pubescent. |
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Pedicels | 1–4(–8) mm in fruit. |
1–4(–5) mm in fruit. |
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Flowers | 2 per node, or 1 or 2 per node on 1 plant, chasmogamous. |
1 per node, chasmogamous. |
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Styles | glandular-puberulent. |
glandular-puberulent. |
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Corollas | 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. |
lavender to magenta with diffuse dark markings on sides of darker tube-throat and with dark red-purple midveins on lobes extending from throat, lobes not dark at base, floor white or yellow, fading to white at mouth, palate ridges white or yellow fading to white distally, throat ceiling glabrous, tube-throat 10–20 mm, limb 8–20 mm diam., not bilabiate. |
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Calyces | 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. |
symmetrically attached to pedicels, inflated in fruit, (7–)8–15 mm, villous, hairs eglandular, lobes subequal, apex acute to attenuate, ribs and intercostal areas often reddish. |
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Capsules | (6–)7–13(–15) mm. |
7–11 mm. |
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Anthers | included, glabrous, sometimes ciliate. |
included, ciliate. |
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Stigmas | included, lobes equal. |
included, lobes unequal, abaxial 1.5 times adaxial. |
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2n | = 16. |
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Diplacus bigelovii |
Diplacus viscidus |
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Phenology | Flowering Apr–Jul. | |||||
Habitat | Chaparral clearings and openings. | |||||
Elevation | 90–1300 m. (300–4300 ft.) | |||||
Distribution |
AZ; CA; NV; UT
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CA
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Discussion | 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.) |
D. M. Thompson (2005) noted that Diplacus viscidus and D. compactus (as Mimulus viscidus var. compactus) are parapatric and may intergrade in central Mariposa County. The two taxa are distinguished by the presence or absence of dark stripes on the corolla lobe midveins, which are evident even on herbarium specimens. Thompson found that the two remained distinct when grown together in the greenhouse. Diplacus viscidus is known from Amador, Calaveras, Eldorado, Mariposa, Merced, and Tuolumne counties; D. compactus continues south through Fresno, northern Kern, Madera, Mariposa, and Tulare counties. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 17, p. 434. | FNA vol. 17, p. 432. | ||||
Parent taxa | Phrymaceae > Diplacus | Phrymaceae > Diplacus | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Eunanus bigelovii, Mimulus bigelovii | Mimulus viscidus, M. fremontii var. viscidus, M. subsecundus var. viscidus | ||||
Name authority | (A. Gray) G. L. Nesom: Phytoneuron 2012-39: 28. (2012) | (Congdon) G. L. Nesom: Phytoneuron 2012-39: 29. (2012) | ||||
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