Diplacus ovatus

(A. Gray) G. L. Nesom
Phytoneuron 2012-39: 29; 2012-47: 3. 2012.
Common names: Steamboat or eggleaf monkeyflower
EndemicConservation concern
Basionym: Mimulus bigelovii var. ovatus A. Gray in A. Gray et al. Syn. Fl. N. Amer. ed. 2, 2(1): 445. 1886
Synonyms: M. ovatus (A. Gray) N. H. Holmgren
Treatment appears in FNA Volume 17. Treatment on page 440. Mentioned on page 430.

Herbs, annual. Stems erect to ascending, 20–140 mm, distal internodes 1–3 mm, glandular-pubescent and short glandular-villous. Leaves usually cauline, relatively even-sized or slightly reduced distally; petiole absent, base sometimes tapered to narrow, petiole-like extension; blade obovate to broadly oblanceolate, 13–33 × 5–12(–16) mm, margins entire, plane, apex acuminate, surfaces densely glandular-villous. Pedicels 2–3(–5) 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, 7–9(–10) mm, coarsely glandular-pubescent, lobes subequal, apex lanceolate to narrowly lanceolate, ribs purplish, intercostal areas white. Corollas magenta to red-purple with a yellow patch on palate, sometimes yellow with a red-brown patch, palate ridges orange-yellow, tube-throat 9–11 mm, limb 12–15 mm diam., bilabiate. Anthers exserted, sparsely hirsutulous. Styles glandular-puberulent. Stigmas exserted, lobes subequal. Capsules 6–8 mm.


Phenology: Flowering Apr–Jun(–Aug).
Habitat: Dry to moist, often barren, loose, sandy to gravelly slopes, andesite or rhyolite deposits, sandy alkaline valley floors, roadsides, washes, sagebrush, pinyon-juniper, open yellow pine woodlands.
Elevation: 1300–1900(–2400) m.

Discussion

Mimulus ovatus was treated as a distinct species by N. H. Holmgren (1984); the plants were considered by D. M. Thompson (2005) to be hybrids between M. nanus var. mephiticus and M. cusickii, and he placed the name as a synonym of M. cusickii. Diplacus ovatus is known only from Carson City, Douglas, and southern Washoe counties.

Selected References

None.

Lower Taxa

None.

... more about "Diplacus ovatus"
Guy L. Nesom +  and Melissa C. Tulig +
(A. Gray) G. L. Nesom +
Mimulus bigelovii var. ovatus +
Steamboat or eggleaf monkeyflower +
1300–1900(–2400) m. +
Dry to moist, often barren, loose, sandy to gravelly slopes, andesite or rhyolite deposits, sandy alkaline valley floors, roadsides, washes, sagebrush, pinyon-juniper, open yellow pine woodlands. +
Flowering Apr–Jun(–Aug). +
Phytoneuron +
Endemic +  and Conservation concern +
M. ovatus +
Diplacus ovatus +
Diplacus +
species +