Diplacus nanus

(Hooker & Arnott) G. L. Nesom

Phytoneuron 2012-39: 29. 2012.

Common names: Dwarf or purple monkeyflower
Endemic
Basionym: Mimulus nanus Hooker & Arnott Bot. Beechey Voy., 378. 1839
Synonyms: M. tolmiei (Bentham) Rydberg
Treatment appears in FNA Volume 17. Treatment on page 440. Mentioned on page 427, 430, 439, 441, 442.

Herbs, annual. Stems erect, 30–120 mm, minutely glandular-puberulent. Leaves 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 1–3 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, 6–9 mm, minutely glandular-puberulent, lobes subequal, apex acute-apiculate, acuminate, or attenuate, ribs dark green or reddish, intercostal areas whitish. Corollas 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. Anthers included or exserted, ciliate. Styles glandular-puberulent or glandular-pubescent. Stigmas exserted, lobes equal. Capsules 8–12 mm. 2n = 16.


Phenology: Flowering (Apr–)May–Jul.
Habitat: Openings in sagebrush, disturbed slopes, granite outcrops.
Elevation: (300–)1100–2300(–2900) m.

Distribution

Calif., Idaho, Mont., Nev., Oreg., Wash., Wyo.

Discussion

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.

Selected References

None.

Lower Taxa

None.
... more about "Diplacus nanus"
exserted +  and included +
Guy L. Nesom +  and Melissa C. Tulig +
(Hooker & Arnott) G. L. Nesom +
Mimulus nanus +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (3 cm30 mm <br />0.03 m <br />) +
narrowly elliptic;oblanceolate ovate obovate or elliptic-lanceolate +
? (?) +, ? (?) +  and ? (?) +
0.7mm;8mm +
glandular-puberulent +
not inflated +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Dwarf or purple monkeyflower +
not +, rarely radially symmetric +  and weakly strongly bilabiate +
magenta;purplish +
Calif. +, Idaho +, Mont. +, Nev. +, Oreg. +, Wash. +  and Wyo. +
(300–)1100–2300(–2900) m. +
hairy +  and glabrous +
reflexed;nodding;erect +
reduced +
compressed;asymmetrically ovoid;lanceoloid or nearly cylindric +
Openings in sagebrush, disturbed slopes, granite outcrops. +
gland-tipped +
alternate +, opposite +, rosulate +  and subrosulate +
persistent +  and deciduous +
cauline +  and basal +
equal-sized +
0.8 cm8 mm <br />0.008 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
triangular;deltate +
subequal +
palmate +  and subpinnate +
wing-angled +  and angled +
2 +  and 1 +
chasmogamous +
basal +  and superior +
tenuinucellate +  and unitegmic +
orthotropous +  and anatropous +
rarely more or less equal to or slightly longer +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Flowering (Apr–)May–Jul. +
Phytoneuron +
reddish +  and dark green +
flattened +, ovoid +  and oblong +
deciduous +
3 cm30 mm <br />0.03 m <br /> (12 cm120 mm <br />0.12 m <br />) +
glandular-pubescent +  and glandular-puberulent +
glandular-puberulent +
M. tolmiei +
Diplacus nanus +
Diplacus +
species +
1.1 cm11 mm <br />0.011 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
1.1mm;1.9mm +
10 +, 9 +  and 8 +