Diplacus douglasii

(Bentham) G. L. Nesom

Phytoneuron 2012-39: 32. 2012.

Common names: Brownies purple mouse-ears
Endemic
Basionyms: Eunanus douglasii Bentham in A. P. de Candolle and A. L. P. P. de Candolle Prodr. 10: 374. 1846
Synonyms: Mimulus cleistogamus J. T. Howell M. douglasii (Bentham) A. Gray
Treatment appears in FNA Volume 17. Treatment on page 445. Mentioned on page 427, 429.

Herbs, annual. Stems erect, 3–40 (–80) mm, glandular-puberulent and/or glandular-pubescent. Leaves usually basal, reduced distally; petiole absent, larger with petiolelike extension; blade obovate to elliptic, 5–28 (–35) × (2–) 3–10 (–12) mm, margins entire or crenate, plane, not ciliate, apex obtuse, surfaces: proximals glabrate, distals glandular-pilose adaxially. Pedicels (1–) 2–4 mm in fruit, usually twisting to invert calyx. Flowers 2 per node, or 1 or 2 per node on 1 plant, chasmogamous or cleistogamous. Calyces distinctly asymmetrically attached to pedicel, not inflated in fruit, (6–) 8–14 (–15) mm, sparsely glandular-pilose, lobes subequal, apex appearing acute due to their continuity with ribs, ribs green to purplish, intercostal areas whitish. Corollas: throat magenta to dark purple, inside with longitudinal gold markings basally, adaxial lip magenta, palate ridges golden yellow, tube-throat (15–) 20–41 (–45) mm, limb 10–14 mm diam., abaxial lip essentially absent. Anthers (distal pair) nearly exserted, glabrous or glabrate. Styles pubescent distally. Stigmas exserted, lobes unequal, abaxial 10–20 times adaxial. Capsules (2.5–) 3–6.5 mm. 2n = 18.


Phenology: Flowering Feb–Apr(–May).
Habitat: Gentle to moderately steep slopes, upper banks of small creeks and ditches.
Elevation: 50–1200 m.

Discussion

Diplacus douglasii occurs in southwestern Oregon and the northern two-thirds of California.

Diplacus douglasii is distinct in the complete or nearly complete lack of abaxial corolla lobes. Diplacus brandegeei, D. congdonii, D. kelloggii, and D. traskiae, the other species of sect. Cleisanthus, also show a distinct tendency toward reduction of the abaxial corolla lobes, and all species of the group except D. brandegeei produce markedly elongate corolla tubes.

Selected References

None.

Lower Taxa

None.

... more about "Diplacus douglasii"
10-20 times adaxial lobes +
glabrate +  and glabrous +
Guy L. Nesom +  and Melissa C. Tulig +
(Bentham) G. L. Nesom +
Eunanus douglasii +
2.8 cm28 mm <br />0.028 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
obovate;elliptic +
not +, leathery +  and not fleshy +
3mm;10mm +
1.4 cm14 mm <br />0.014 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
glandular-pilose +
not inflated +
0.8 cm8 mm <br />0.008 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
Brownies +  and purple mouse-ears +
not +, rarely radially symmetric +  and weakly strongly bilabiate +
white;yellow;orange;yellow;orange;purplish brown;purple;lavender;magenta;red;pink;blue +
glandular-pilose +
Calif. +  and Oreg. +
50–1200 m. +
petiole-like +
hairy +  and glabrous +
reflexed;nodding;erect +
reduced +
compressed;asymmetrically ovoid;lanceoloid or nearly cylindric +
Gentle to moderately steep slopes, upper banks of small creeks and ditches. +
gland-tipped +
alternate +, opposite +, rosulate +  and subrosulate +
persistent +  and deciduous +
reduced +
1 cm10 mm <br />0.01 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
triangular;deltate +
unequal +  and subequal +
palmate +  and subpinnate +
plane +, crenate +  and entire +
wing-angled +  and angled +
2 +  and 1 +
cleistogamous +  and chasmogamous +
basal +  and superior +
tenuinucellate +  and unitegmic +
orthotropous +  and anatropous +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
rarely more or less equal to or slightly longer +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Flowering Feb–Apr(–May). +
Phytoneuron +
green +  and purplish +
flattened +, ovoid +  and oblong +
deciduous +
0.3 cm3 mm <br />0.003 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Mimulus cleistogamus +  and M. douglasii +
Diplacus douglasii +
Diplacus +
species +
4.1 cm41 mm <br />0.041 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
2 cm20 mm <br />0.02 m <br /> (4.1 cm41 mm <br />0.041 m <br />) +
magenta +  and dark purple +
10 +, 9 +  and 8 +