Flora of North America species comparison

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Diplacus layneae

Diplacus mohavensis

Layne's monkeyflower

Mohave monkeyflower, Mojave monkey-flower
Habit Herbs, annual, herbage usually drying dark. Herbs, annual.
Stems

erect, 30–160(–300) mm, nodes 3–6, glandular-puberulent to glandular-pubescent, hairs 0.2–0.8 mm.

erect, (10–)20–100(–140) mm, terete.
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.

basal and cauline, relatively even-sized;

petiole absent;

blade narrowly elliptic to elliptic-lanceolate, (6–)7–27 × 1.2–8(–10) mm, margins entire, plane, apex obtuse to acute or acuminate, surfaces green, often red-purple tinted, usually glabrous, veins and margins glandular-puberulent or ciliate.
Pedicels

2–4(–5) mm in fruit.

2–5(–6) mm in fruit.
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.
Styles

glandular-puberulent.

sparsely glandular-puberulent.
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.

salverform-rotate, throat dark purplish brown without internal or external markings, floor purplish brown-pilose, lobes purplish brown basally with red veins, palate ridges absent, tube-throat 9–15(–18) mm, limb 8–11(–14) mm diam., not bilabiate.
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.

asymmetrically attached to pedicel, inflated in fruit, 7–15(–16) mm, glabrous or with glandular-puberulent veins, lobes unequal, apex acuminate, ribs and intercostal areas purplish brown.
Capsules

6–10(–13) mm.

(7–)8–13 mm.
Anthers

included, ciliate.

included, glabrous or with a few hairs at base of flower pair.
Stigmas

included, lobes unequal, abaxial 1.5 times adaxial.

included, lobes subequal.
2n

= 16.

= 16.

Diplacus layneae

Diplacus mohavensis
Phenology Flowering May–Aug. Flowering Apr–May.
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. Gravelly hillsides and slopes, limestone, granite, fine gravel in wash bottoms and edges, commonly with Larrea.
Elevation (100–)400–2400 m. ((300–)1300–7900 ft.) 600–900 m. (2000–3000 ft.)
Distribution
from FNA
CA
[WildflowerSearch map]
from FNA
CA
[WildflowerSearch map]
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 mohavensis is known from San Bernardino County.

Diplacus mohavensis is similar to D. pictus in features of corolla morphology and color patterning, and the pair sometimes has been segregated as Mimulus sect. Mimulastrum A. Gray (for example, by D. M. Thompson 2005). Molecular data (P. M. Beardsley et al. 2004) indicate that D. mohavensis arose from within sect. Eunanus. It is distinct from other species of sect. Eunanus (and similar to D. pictus) in its salverform-rotate corollas with an abrupt tube-throat transition and vein-patterned limb. In D. mohavensis, the limb is purplish brown basally with red, irregularly patterned veins fading into a wide, whitish distal border; in D. pictus, the limb is all white, and the purplish brown vein patterning is more regular and not fading distally.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 437. FNA vol. 17, p. 444.
Parent taxa Phrymaceae > Diplacus Phrymaceae > Diplacus
Sibling taxa
D. angustatus, D. aridus, D. aurantiacus, D. bicolor, D. bigelovii, D. bolanderi, D. brandegeei, D. brevipes, D. calycinus, D. cascadensis, D. clevelandii, D. clivicola, D. compactus, D. congdonii, D. constrictus, D. cusickii, D. cusickioides, D. deschutesensis, D. douglasii, D. fremontii, D. grandiflorus, D. graniticola, D. jepsonii, D. johnstonii, D. kelloggii, D. leptaleus, D. linearis, D. longiflorus, D. mephiticus, D. mohavensis, D. nanus, D. ovatus, D. parryi, D. parviflorus, D. pictus, D. pulchellus, D. puniceus, D. pygmaeus, D. rattanii, D. rupicola, D. rutilus, D. thompsonii, D. torreyi, D. traskiae, D. tricolor, D. vandenbergensis, D. viscidus
D. angustatus, D. aridus, D. aurantiacus, D. bicolor, D. bigelovii, D. bolanderi, D. brandegeei, D. brevipes, D. calycinus, D. cascadensis, D. clevelandii, D. clivicola, D. compactus, D. congdonii, D. constrictus, D. cusickii, D. cusickioides, D. deschutesensis, D. douglasii, D. fremontii, D. grandiflorus, D. graniticola, D. jepsonii, D. johnstonii, D. kelloggii, D. layneae, D. leptaleus, D. linearis, D. longiflorus, D. mephiticus, D. nanus, D. ovatus, D. parryi, D. parviflorus, D. pictus, D. pulchellus, D. puniceus, D. pygmaeus, D. rattanii, D. rupicola, D. rutilus, D. thompsonii, D. torreyi, D. traskiae, D. tricolor, D. vandenbergensis, D. viscidus
Synonyms Eunanus layneae, Mimulus brachiatus, M. layneae Mimulus mohavensis, Eunanus mohavensis
Name authority (Greene) G. L. Nesom: Phytoneuron 2012-39: 29. (2012) (Lemmon) G. L. Nesom: Phytoneuron 2012-39: 29. (2012)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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