Diplacus tricolor

(Hartweg ex Lindley) G. L. Nesom
Phytoneuron 2012-39: 30. 2012.
Common names: Tricolor monkeyflower
Basionym: Mimulus tricolor Hartweg ex Lindley J. Hort. Soc. London 4: 222. 1849
Treatment appears in FNA Volume 17. Treatment on page 447. Mentioned on page 427, 428, 429, 430, 448.

Herbs, annual, acaulescent or caulescent. Stems erect or ascending, 10–140(–170) mm, densely glandular-puberulent. Leaves basal densely clustered; petiole absent; blade narrowly elliptic to oblanceolate, (5–)8–45(–60) × (1–)3–12(–20) mm, margins entire, sometimes toothed, plane, not ciliate, apex obtuse, surfaces glandular-puberulent. Pedicels 1–3(–5) mm in fruit. Flowers 1 per node, chasmogamous. Calyces slightly asymmetrically attached to pedicel, not inflated in fruit, (6–)11–23 mm, densely glandular-puberulent, lobes subequal, apex obtuse, ribs often purplish proximally, intercostal areas whitish. Corollas tricolored, limb and throat magenta to purple, each lobe with a discrete, dark maroon-purple blotch at base, all 3 blotches of abaxial lip round and not usually extending into throat, palate ridges yellow, flanked with white, sometimes purple-spotted, tube-throat (13–)15–50 mm, limb 7–21 mm diam., bilabiate, lobes equal. Anthers included, with apical tufts of short, eglandular hairs. Styles usually glandular-puberulent. Stigmas nearly exserted, lobes subequal. Capsules (2–)3–8(–10) mm, indehiscent. 2n = 18.

Phenology: Flowering Mar–Jul(–Aug).
Habitat: Vernally flooded depressions in grasslands, low spots and ditches in and around agricultural fields.
Elevation: 50–1500 m.


Diplacus tricolor occurs in northwestern and south-central Oregon and from there across a disjunction to central California as far as Kern County.

Selected References


Lower Taxa


... more about "Diplacus tricolor"
Guy L. Nesom +  and Melissa C. Tulig +
(Hartweg ex Lindley) G. L. Nesom +
Mimulus tricolor +
Tricolor monkeyflower +
Calif. +  and Oreg. +
50–1500 m. +
Vernally flooded depressions in grasslands, low spots and ditches in and around agricultural fields. +
Flowering Mar–Jul(–Aug). +
Phytoneuron +
Eunanus +  and Mimulus sect. Diplacus +
Diplacus tricolor +
Diplacus +
species +