Diplacus mohavensis

(Lemmon) G. L. Nesom

Phytoneuron 2012-39: 29. 2012.

Common names: Mohave monkeyflower
EndemicConservation concern
Basionym: Mimulus mohavensis Lemmon Bot. Gaz. 9: 142. 1884
Synonyms: Eunanus mohavensis (Lemmon) Greene
Treatment appears in FNA Volume 17. Treatment on page 444. Mentioned on page 426, 428.

Herbs, annual. Stems erect, (10–) 20–100 (–140) mm, terete. Leaves basal and cauline, relatively even-sized; petiole absent; blade narrowly elliptic to elliptic-lanceolate, (6–) 7–27 × 1.2–8 (–10) mm, margins entire, plane, apex obtuse to acute or acuminate, surfaces green, often red-purple tinted, usually glabrous, veins and margins glandular-puberulent or ciliate. Pedicels 2–5 (–6) mm in fruit. Flowers 2 per node, or 1 or 2 per node on 1 plant, chasmogamous. Calyces asymmetrically attached to pedicel, inflated in fruit, 7–15 (–16) mm, glabrous or with glandular-puberulent veins, lobes unequal, apex acuminate, ribs and intercostal areas purplish brown. Corollas salverform-rotate, throat dark purplish brown without internal or external markings, floor purplish brown-pilose, lobes purplish brown basally with red veins, palate ridges absent, tube-throat 9–15 (–18) mm, limb 8–11 (–14) mm diam., not bilabiate. Anthers included, glabrous or with a few hairs at base of flower pair. Styles sparsely glandular-puberulent. Stigmas included, lobes subequal. Capsules (7–) 8–13 mm. 2n = 16.


Phenology: Flowering Apr–May.
Habitat: Gravelly hillsides and slopes, limestone, granite, fine gravel in wash bottoms and edges, commonly with Larrea.
Elevation: 600–900 m.

Discussion

Diplacus mohavensis is known from San Bernardino County.

Diplacus mohavensis is similar to D. pictus in features of corolla morphology and color patterning, and the pair sometimes has been segregated as Mimulus sect. Mimulastrum A. Gray (for example, by D. M. Thompson 2005). Molecular data (P. M. Beardsley et al. 2004) indicate that D. mohavensis arose from within sect. Eunanus. It is distinct from other species of sect. Eunanus (and similar to D. pictus) in its salverform-rotate corollas with an abrupt tube-throat transition and vein-patterned limb. In D. mohavensis, the limb is purplish brown basally with red, irregularly patterned veins fading into a wide, whitish distal border; in D. pictus, the limb is all white, and the purplish brown vein patterning is more regular and not fading distally.

Selected References

None.

Lower Taxa

None.
... more about "Diplacus mohavensis"
with a few hairs +  and glabrous +
Guy L. Nesom +  and Melissa C. Tulig +
(Lemmon) G. L. Nesom +
Mimulus mohavensis +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (2.7 cm27 mm <br />0.027 m <br />) +
narrowly elliptic;elliptic-lanceolate +
? (?) +, ? (?) +  and ? (?) +
1.2mm;8mm +
1.5 cm15 mm <br />0.015 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
with glandular-puberulent veins +  and glabrous +
inflated +
0.7 cm7 mm <br />0.007 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
Mohave monkeyflower +
not +, rarely radially symmetric +  and weakly strongly bilabiate +
white;yellow;orange;yellow;orange;purplish brown;purple;lavender;magenta;red;pink;blue +
600–900 m. +
hairy +  and glabrous +
reflexed;nodding;erect +
reduced +
compressed;asymmetrically ovoid;lanceoloid or nearly cylindric +
Gravelly hillsides and slopes, limestone, granite, fine gravel in wash bottoms and edges, commonly with Larrea. +
gland-tipped +
alternate +, opposite +, rosulate +  and subrosulate +
persistent +  and deciduous +
cauline +  and basal +
equal-sized +
not bilabiate +
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
purplish brown +
triangular;deltate +
subequal +  and unequal +
palmate +  and subpinnate +
ciliate +  and glandular-puberulent +
wing-angled +  and angled +
2 +  and 1 +
chasmogamous +
basal +  and superior +
tenuinucellate +  and unitegmic +
orthotropous +  and anatropous +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
rarely more or less equal to or slightly longer +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering Apr–May. +
Phytoneuron +
purplish brown +
flattened +, ovoid +  and oblong +
Endemic +  and Conservation concern +
deciduous +
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
glandular-puberulent +
red-purple tinted +  and green +
Eunanus mohavensis +
Diplacus mohavensis +
Diplacus +
species +
1.5 cm15 mm <br />0.015 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
purplish brown-pilose +  and dark purplish brown +
glandular-puberulent +  and ciliate +
10 +, 9 +  and 8 +