Flora of North America species comparison

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Diplacus johnstonii

Diplacus nanus

Johnston's monkeyflower

dwarf monkey flower, dwarf purple monkey-flower, purple monkeyflower
Habit Herbs, annual. Herbs, annual.
Stems

erect, (10–)30–200(–300) mm, densely glandular-puberulent.

erect, 30–120 mm, minutely glandular-puberulent.
Leaves

basal and cauline, gradually reduced distally;

petiole absent, bases of larger leaves often with petiole-like extensions;

blade obovate or oblanceolate, sometimes elliptic, (4.5–)7–25(–32) × 2–12(–15) mm, margins entire, plane, apex rounded to acute, surfaces densely glandular-puberulent.

basal and cauline, relatively even-sized;

petiole absent;

blade narrowly elliptic to oblanceolate, ovate, obovate, or elliptic-lanceolate, (1–)3–30(–50) × (0.4–)0.7–8(–20) mm, margins entire, plane, apex rounded or obtuse, surfaces minutely glandular-puberulent.
Pedicels

1–4(–5) mm in fruit.

1–3 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

densely glandular-puberulent distally.

glandular-puberulent or glandular-pubescent.
Corollas

magenta, darker and more reddish in throat and, often, along narrow radiating lines extending from throat onto midveins of lobes, throat usually with a large dark spot on each side of mouth on lateral walls, palate ridges and throat floor yellow with reddish spots, tube-throat 9–15 mm, limb 10–15 mm diam., not bilabiate.

magenta to purplish, dark line often extending onto each abaxial lip lobe from throat, palate ridges yellow with red-purple speckling and border, throat floor villous with hairs extending onto abaxial lip, tube 1.1–1.9 mm diam. at filament insertion, tube-throat 11–15 mm, limb 8–14 mm diam., usually, rarely not, bilabiate.
Calyces

symmetrically attached to pedicels, not inflated in fruit, (6–)7–11 mm, glandular-puberulent, lobes unequal, apex acute to acuminate, ribs inconspicuous, intercostal areas reddish.

symmetrically attached to pedicels, not inflated in fruit, 6–9 mm, minutely glandular-puberulent, lobes subequal, apex acute-apiculate, acuminate, or attenuate, ribs dark green or reddish, intercostal areas whitish.
Capsules

7–12 mm.

8–12 mm.
Anthers

included, glabrous.

included or exserted, ciliate.
Stigmas

exserted or at opening of corolla tube-throat, lobes equal.

exserted, lobes equal.
2n

= 16.

= 16.

Diplacus johnstonii

Diplacus nanus
Phenology Flowering May–Aug. Flowering (Apr–)May–Jul.
Habitat Steep, unstable scree slides, talus slopes, gravel slides, cracks in granite cliffs, ridges, washes, steep sand and gravel slopes, canyon bottoms, gravelly road banks, recent burns, desert scrub, chaparral, juniper, pinyon-juniper, lodgepole pine, yellow pine, Jeffrey pine, and Jeffrey pine-western white pine-fir woodlands. Openings in sagebrush, disturbed slopes, granite outcrops.
Elevation (1000–)1300–2900 m. ((3300–)4300–9500 ft.) (300–)1100–2300(–2900) m. ((1000–)3600–7500(–9500) ft.)
Distribution
from FNA
CA
[WildflowerSearch map]
from FNA
CA; ID; MT; NV; OR; WA; WY
[WildflowerSearch map]
Discussion

Populations of Diplacus johnstonii occur in Los Angeles, Riverside, San Bernardino, Santa Barbara, and Ventura counties. The populations in northwestern Los Angeles, Santa Barbara, and Ventura counties were noted by D. M. Thompson (2005) to be intermediate between D. constrictus and D. johnstonii.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Diplacus nanus is broadly distributed through northern California, southern Idaho, and eastern Oregon, with stations in Ravalli County, Montana, and Park County, Wyoming, and scattered localities in Washington.

Diplacus nanus is generally recognized by its strongly bilabiate corollas with purplish (not yellow) tubes and two dark purple patches along the sides of the throats. The glandular-puberulent vestiture of D. nanus contrasts with the glandular-pubescent and viscid-villous vestiture (with hairs much longer) of D. mephiticus.

W. L. Ezell (1971) noted that in the Siskiyou Mountains of Josephine County, Oregon, and adjacent Siskiyou and Trinity counties, California, corollas of Diplacus nanus do not have clearly differentiated abaxial and adaxial lips.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 433. FNA vol. 17, p. 440.
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. 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. 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. 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 johnstonii Mimulus nanus, M. tolmiei
Name authority (A. L. Grant) G. L. Nesom: Phytoneuron 2012-39: 29. (2012) (Hooker & Arnott) 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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