Diplacus bicolor

(A. Gray) Hrusa

Phytoneuron 2014-17: 1. 2014.

Common names: Whitney’s monkeyflower
Endemic
Basionym: Eunanus bicolor A. Gray Proc. Amer. Acad. Arts 7: 381. 1868
Synonyms: M. nanus var. bicolor (A. Gray) A. Gray M. whitneyi A. Gray
Treatment appears in FNA Volume 17. Treatment on page 437. Mentioned on page 429, 431, 432.

Herbs, annual, herbage usually drying dark. Stems erect or ascending, 10–140 (–220) mm, glandular-puberulent to glandular-pubescent. Leaves usually cauline, relatively even-sized; petiole absent; blade narrowly elliptic to narrowly oblanceolate, linear-lanceolate, or linear, (4–) 7–23 (–34) × 1–5 (–8) mm, margins entire, plane, not ciliate, apex acute, surfaces glandular-puberulent. Pedicels 1–3 (–4) 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, (3–) 4–8 (–10) mm, glandular-puberulent, tube not strongly plicate, lobes triangular, subequal, apex acute-apiculate, ribs narrow, darkened, purplish, thin, not strongly raised, intercostal areas pale green. Corollas: (a) magenta, darkening toward mouth and within tube, often nearly obscuring dark longitudinal stripes within, throat floor or at least palate ridges yellow, or (b) yellow, usually with maroon stripes in throat extending onto lobe bases, sometimes with maroon blotches on adaxial lateral walls of throat, colored palate ridges ending in throat, tube-throat (10–) 13–18 (–20) mm, limb 10–19 mm diam., not bilabiate. Anthers included, ciliate. Styles glandular-puberulent. Stigmas included, lobes equal. Capsules (4.5–) 6–10 (–13) mm. 2n = 16.


Phenology: Flowering May–Sep.
Habitat: Disturbed areas, water runoff areas, granitic soils, edges of granite outcrops.
Elevation: (1200–)1500–3300 m.

Discussion

Diplacus bicolor is endemic to Fresno, Kern, and Tulare counties in the southern Sierra Nevada. The combination D. whitneyi (A. Gray) G. L. Nesom is illegitimate, as Mimulus whitneyi A. Gray 1886, is a replacement name based on Eunanus bicolor A. Gray 1868.

Diplacus bicolor, D. bigelovii, D. constrictus, D. graniticola, D. layneae, and D. thompsonii appear to be closely related species, sometimes intergrading where sympatric. Plants of each species often produce flowers at all nodes and have dark magenta corollas with nearly regular to weakly bilabiate limbs and villous vestiture. Specimens of each species dry to a dark color.

Selected References

None.

Lower Taxa

None.
... more about "Diplacus bicolor"
Guy L. Nesom +  and Melissa C. Tulig +
(A. Gray) Hrusa +
Eunanus bicolor +
2.3 cm23 mm <br />0.023 m <br /> (3.4 cm34 mm <br />0.034 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
narrowly elliptic;narrowly oblanceolate linear-lanceolate or linear +
? (?) +, ? (?) +  and ? (?) +
1mm;5mm +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
glandular-puberulent +
not inflated +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Whitney’s monkeyflower +
not +, rarely radially symmetric +  and weakly strongly bilabiate +
darkening;magenta +
(1200–)1500–3300 m. +
hairy +  and glabrous +
reflexed;nodding;erect +
reduced +
compressed;asymmetrically ovoid;lanceoloid or nearly cylindric +
Disturbed areas, water runoff areas, granitic soils, edges of granite outcrops. +
gland-tipped +
alternate +, opposite +, rosulate +  and subrosulate +
persistent +  and deciduous +
equal-sized +
not bilabiate +
1 cm10 mm <br />0.01 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
triangular +
subequal +
palmate +  and subpinnate +
wing-angled +  and angled +
2 +  and 1 +
chasmogamous +
basal +  and superior +
tenuinucellate +  and unitegmic +
orthotropous +  and anatropous +
1.8 cm18 mm <br />0.018 m <br /> (2 cm20 mm <br />0.02 m <br />) +
colored +, maroon blotches +, maroon stripes +  and yellow +
1.3 cm13 mm <br />0.013 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
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 May–Sep. +
Phytoneuron +
purplish +  and darkened +
flattened +, ovoid +  and oblong +
deciduous +
ascending;erect +
1 cm10 mm <br />0.01 m <br /> (14 cm140 mm <br />0.14 m <br />) +
glandular-puberulent +
glandular-puberulent +
M. nanus var. bicolor +  and M. whitneyi +
Diplacus bicolor +
Diplacus +
species +
10 +, 9 +  and 8 +