Diplacus layneae |
Diplacus aridus |
|
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Layne's monkeyflower |
low bush monkeyflower, San Diego bush monkeyflower |
|
Habit | Herbs, annual, herbage usually drying dark. | Subshrubs. |
Stems | erect, 30–160(–300) mm, nodes 3–6, glandular-puberulent to glandular-pubescent, hairs 0.2–0.8 mm. |
erect, 80–330 mm, glabrous. |
Leaves | usually cauline, relatively even-sized; petiole weakly delimited; blade elliptic to narrowly elliptic, oblanceolate, elliptic-oblanceolate, or elliptic-lanceolate, 8–27(–35) × 2–8 mm, margins entire, rarely toothed, plane, apex rounded to obtuse, surfaces: proximals often glabrate, distals glandular-puberulent or glandular-pubescent. |
cauline, relatively even-sized; petiole absent or short; blade narrowly ovate to elliptic-lanceolate, elliptic, or oblanceolate, 20–50 × 3–15 mm, margins dentate to serrate, plane or revolute, apex obtuse to acute, surfaces glabrous. |
Pedicels | 2–4(–5) mm in fruit. |
3–10 mm in fruit. |
Flowers | 2 per node, or 1 or 2 per node on 1 plant, chasmogamous. |
2 per node, chasmogamous. |
Styles | glandular-puberulent. |
minutely glandular. |
Corollas | pinkish or pale to dark magenta or red-purple, each lobe usually with a faint to dark medial line extending 1/2 or less to tip, throat floor yellowish near base, mostly white with red-purple dots near mouth, palate ridges white, tube-throat 10–15 mm, limb (8–)10–16 mm diam., not bilabiate. |
pale yellow to cream or nearly white, pale orange, golden yellow, or orange-yellow, not spotted or striped, palate ridges golden yellow, throat internally glabrous, tube-throat 37–52 mm, limb 15–22 mm diam., not bilabiate, lobes entire. |
Calyces | symmetrically attached to pedicels, not inflated in fruit, (5–)6–8(–9) mm, glandular-puberulent to glandular-pubescent, tube strongly plicate, lobes triangular, subequal, apex acute, ribs broad, darkened, blackish, thickened, strongly raised, intercostal areas whitish, membranous. |
inflated in fruit, 35–40 mm, glabrous, tube distinctly dilated distally, lobes subequal, apex acute, ribs green, intercostal areas light green. |
Capsules | 6–10(–13) mm. |
20–36 mm. |
Anthers | included, ciliate. |
exserted (at throat), glabrous. |
Stigmas | included, lobes unequal, abaxial 1.5 times adaxial. |
exserted, lobes equal. |
2n | = 16. |
= 20. |
Diplacus layneae |
Diplacus aridus |
|
Phenology | Flowering May–Aug. | Flowering Apr–Jun. |
Habitat | Road banks, serpentine, granitic sand, red clay, lava beds and volcanic soils, openings in chaparral, shallow dry streambeds or stream banks, burned or otherwise disturbed open areas. | Rock walls, dry rocky soils. |
Elevation | (100–)400–2400 m. ((300–)1300–7900 ft.) | 200–1500 m. (700–4900 ft.) |
Distribution |
CA
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CA
|
Discussion | D. M. Thompson (2005) observed that two forms of Diplacus layneae co-occur from the Yosemite National Park area southward; one of these is recognized here as D. graniticola. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Diplacus aridus is known from Imperial and San Diego counties. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 17, p. 437. | FNA vol. 17, p. 452. |
Parent taxa | Phrymaceae > Diplacus | Phrymaceae > Diplacus |
Sibling taxa | ||
Synonyms | Eunanus layneae, Mimulus brachiatus, M. layneae | Mimulus aridus, M. aurantiacus var. aridus |
Name authority | (Greene) G. L. Nesom: Phytoneuron 2012-39: 29. (2012) | Abrams: Bull. Torrey Bot. Club 32: 540. (1905) |
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