Flora of North America species comparison

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Diplacus layneae

Diplacus pygmaeus

Layne's monkeyflower

Egg Lake monkeyflower, pygmy monkeyflower
Habit Herbs, annual, herbage usually drying dark. Herbs, annual, usually acaulescent.
Stems

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

erect, 5–12(–20) mm, glandular-puberulent.
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 or basal and cauline, relatively even-sized;

petiole absent;

blade narrowly elliptic to oblanceolate, 2–15 × 0.5–3.5 mm, margins entire or toothed, plane, proximal 1/2 usually ciliate, apex rounded, surfaces glandular-puberulent.
Pedicels

2–4(–5) mm in fruit.

0–1 mm in fruit.
Flowers

2 per node, or 1 or 2 per node on 1 plant, chasmogamous.

1 per node, usually 1–5 per plant, chasmogamous.
Styles

glandular-puberulent.

sparsely glandular-puberulent distally.
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.

throat, limb, and palate ridges yellow, central abaxial lobe and throat floor sparsely red-spotted, tube-throat 5–10 mm, limb 2–5 mm diam., 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.

slightly asymmetrically attached to pedicel, inflated in fruit, 3.5–8 mm, glandular-puberulent, lobes subequal, apex rounded, ribs reddish purple, intercostal areas white.
Capsules

6–10(–13) mm.

2–4 mm, indehiscent.
Anthers

included, ciliate.

included, glabrous.
Stigmas

included, lobes unequal, abaxial 1.5 times adaxial.

usually exserted, lobes subequal.
2n

= 16.

= 20.

Diplacus layneae

Diplacus pygmaeus
Phenology Flowering May–Aug. Flowering May–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. Vernally flooded swales, mud flats flanking streams, stream banks, low spots in meadows.
Elevation (100–)400–2400 m. ((300–)1300–7900 ft.) 1100–1800 m. (3600–5900 ft.)
Distribution
from FNA
CA
[WildflowerSearch map]
from FNA
CA; OR
[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 pygmaeus occurs in northeastern California and south-central Oregon.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 437. FNA vol. 17, p. 446.
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. mohavensis, D. nanus, D. ovatus, D. parryi, D. parviflorus, D. pictus, D. pulchellus, D. puniceus, 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 pygmaeus
Name authority (Greene) G. L. Nesom: Phytoneuron 2012-39: 29. (2012) (A. L. Grant) G. L. Nesom: Phytoneuron 2012-39: 30. (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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