Diplacus layneae

(Greene) G. L. Nesom
Phytoneuron 2012-39: 29. 2012.
Common names: Layne’s monkeyflower
IllustratedEndemic
Basionym: Eunanus layneae Greene Bull. Calif. Acad. Sci. 1: 104. 1885
Synonyms: Mimulus brachiatus Pennell M. layneae (Greene) Jepson
Treatment appears in FNA Volume 17. Treatment on page 437. Mentioned on page 431, 436, 438.

Herbs, annual, herbage usually drying dark. Stems erect, 30–160(–300) mm, nodes 3–6, glandular-puberulent to glandular-pubescent, hairs 0.2–0.8 mm. 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. Pedicels 2–4(–5) mm in fruit. Flowers 2 per node, or 1 or 2 per node on 1 plant, chasmogamous. 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. 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. Anthers included, ciliate. Styles glandular-puberulent. Stigmas included, lobes unequal, abaxial 1.5 times adaxial. Capsules 6–10(–13) mm. 2n = 16.


Phenology: Flowering May–Aug.
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.
Elevation: (100–)400–2400 m.

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.

Selected References

None.

Lower Taxa

None.

... more about "Diplacus layneae"
Guy L. Nesom +  and Melissa C. Tulig +
(Greene) G. L. Nesom +
Eunanus layneae +
Layne’s monkeyflower +
(100–)400–2400 m. +
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. +
Flowering May–Aug. +
Phytoneuron +
Illustrated +  and Endemic +
Mimulus brachiatus +  and M. layneae +
Diplacus layneae +
Diplacus +
species +