Flora of North America species comparison

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Diplacus leptaleus

least flower monkey flower, least monkeyflower, slender monkeyflower
Habit Herbs, annual.
Stems

erect to ascending, 10–140 mm, glandular-puberulent to short glandular-villous.
Leaves

usually cauline, relatively even-sized;

petiole absent;

blade oblanceolate to linear, (5–)6–24(–34) × (0.5–)1–4(–7.5) mm, margins entire, plane, apex rounded to acute, surfaces glandular-puberulent.
Pedicels

1(–3) mm in fruit.
Flowers

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

sparsely glandular-puberulent.
Corollas

magenta, sometimes white, throat whitish, often speckled with dark spots, palate ridges weak, whitish to pinkish, tube-throat 6–8 mm, limb 3–5 mm diam., not bilabiate.
Calyces

symmetrically attached to pedicels, not inflated in fruit, (2.5–)3–5.5(–6.5) mm, glandular-puberulent, lobes subequal, apex acute, ribs darkened, blackish, intercostal areas purplish.
Capsules

(3–)4–6(–6.5) mm.
Anthers

included, glabrous.
Stigmas

included, lobes unequal, abaxial nearly 2 times adaxial.
2n

= 16.

Diplacus leptaleus
Phenology Flowering Jun–Aug.
Habitat Developing granitic soils, boulders of granite outcrops, disturbed areas, water runoff areas.
Elevation (1800–)2100–3400 m. ((5900–)6900–11200 ft.)
Distribution
from FNA
CA; NV
[WildflowerSearch map]
Discussion

Diplacus leptaleus occurs in the Sierra Nevada from Nevada County south to Tulare County, California, and in southern Washoe County, Nevada. Diplacus leptaleus is the only species of Diplacus that commonly produces white flowers. Populations rarely are fixed for white corollas; they are commonly fixed for magenta corollas, especially at higher elevations (D. M. Thompson 2005).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 438.
Parent taxa 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. layneae, 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
Synonyms Mimulus leptaleus
Name authority (A. Gray) 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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