Diplacus rattanii |
Diplacus cusickii |
|
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Rattan's monkeyflower |
Cusick's monkey-flower |
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Habit | Herbs, annual. | Herbs, annual. |
Stems | erect, 10–180(–230) mm, densely glandular-pubescent and viscid. |
erect to erect-ascending, 10–80 mm, distal internodes 2–20 mm, minutely glandular-puberulent. |
Leaves | basal and cauline, basal in rosette, cauline gradually reduced distally; petiole absent; blade obovate to narrowly elliptic, 3–46(–70) × 1–20(–25) mm, margins entire or crenate, plane, apex rounded or obtuse, surfaces: proximals glabrate, distals glandular-pubescent and viscid. |
basal and cauline or usually cauline, relatively even-sized or gradually larger distally; petiole absent, proximal base short petiole-like, 1–5 mm; blade ovate to broadly elliptic-ovate, (10–)15–25(–35) × 4–17 mm, margins entire, plane, apex acuminate, surfaces glabrous or adaxial minutely glandular-puberulent. |
Pedicels | 1–3(–6) mm in fruit. |
1–1.5 mm in fruit. |
Flowers | 1 per node, chasmogamous. |
2 per node, or 1 or 2 per node on 1 plant, chasmogamous. |
Styles | eglandular-puberulent. |
pubescent, at least on distal 1/2. |
Corollas | pink to magenta, throat floor with 3 dark purple lines meeting abaxial lip lobes, palate ridges yellow, tube-throat 7–10 mm, limb 4–7 mm diam., not bilabiate. |
magenta or rose purple, tube yellow, throat yellow, throat and distal tube red-spotted on floor, palate ridges yellow, tube-throat 13–16(–19) mm, limb 16–24 mm diam., bilabiate. |
Calyces | symmetrically attached to pedicels, inflated in fruit, 5–10 mm, glandular-pubescent and viscid, lobes subequal, apex obtuse, often apiculate, ribs dark green to purplish, intercostal areas whitish. |
symmetrically attached to pedicels, not inflated in fruit, 7–10 mm, glabrous or minutely stipitate-glandular, lobes unequal, apex linear-acuminate, sharp-pointed, ribs green distally, intercostal areas whitish. |
Capsules | 7–11(–12) mm. |
10–15 mm. |
Anthers | nearly exserted, glabrous. |
included, glabrous or sparsely hirsutulous. |
Stigmas | nearly exserted, lobes unequal, abaxial 5–7 times adaxial. |
exserted, lobes subequal. |
2n | = 16. |
|
Diplacus rattanii |
Diplacus cusickii |
|
Phenology | Flowering Apr–Jul. | Flowering May–Jul. |
Habitat | Recently burned or cleared areas, sandhills, sandstone outcrops, sandy gravel and loam, decomposed granite, serpentine-derived soils, open chaparral, chaparral margins, open yellow pine-manzanita woodlands. | Slopes, canyons, washes, ditches, sand talus, diatomaceous slopes, basalt outcrops, black volcanic gravel, volcanic ash and sand, sagebrush areas. |
Elevation | 300–1300 m. (1000–4300 ft.) | 800–1000 m. (2600–3300 ft.) |
Distribution |
CA
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ID; OR
|
Discussion | Diplacus rattanii occurs mostly in near-coastal localities from Glenn and Lake counties south to Ventura County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Diplacus cusickii is endemic to northern Malheur County, Oregon, and along the Snake River in Ada and Owyhee counties, Idaho. Its narrow geographic range reflects the segregation of the more widely distributed D. cusickioides. D. M. Thompson (2005) noted that collections in northern Malheur County, Oregon, were intermediate between Mimulus cusickii and M. nanus; the type of M. cusickii is from this area and is among the narrowly endemic, supposedly putative intermediates (G. L. Nesom 2013c). These plants have abruptly and sharply acuminate leaf apices like the more widespread form traditionally identified as Diplacus cusickii; they differ in having glabrous leaf surfaces. Typical D. nanus occurs in close sympatry, without intergradation, with the populations in northern Malheur County. Because of their distinctive morphology and coherent geography, the northern Malheur County plants are reasonably recognized as a distinct species. The more widely distributed form formerly identified as D. cusickii now is identified as D. cusickioides. Populations of D. cusickii in the narrow sense along the Snake River in Ada and Owyhee counties, Idaho, may have dispersed there from the Oregon center. Some plants of D. cusickioides in the Leslie Gulch area of east-central Malheur County have somewhat reduced vestiture, approaching that of D. cusickii. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 17, p. 432. | FNA vol. 17, p. 439. |
Parent taxa | Phrymaceae > Diplacus | Phrymaceae > Diplacus |
Sibling taxa | ||
Synonyms | Mimulus rattanii, M. rattanii subsp. decurtatus | Eunanus cusickii, Mimulus cusickii |
Name authority | (A. Gray) G. L. Nesom: Phytoneuron 2012-39: 29. (2012) | (Greene) G. L. Nesom: Phytoneuron 2012-39: 28. (2012) |
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