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, petiolelike 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 redbrown 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"
hirsutulous +
Guy L. Nesom +  and Melissa C. Tulig +
(A. Gray) G. L. Nesom +
tapered +
Mimulus bigelovii var. ovatus +
1.2 cm12 mm <br />0.012 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
1.3 cm13 mm <br />0.013 m <br /> (3.3 cm33 mm <br />0.033 m <br />) +
obovate;broadly oblanceolate +
? (?) +, ? (?) +  and ? (?) +
5mm;12mm +
0.9 cm9 mm <br />0.009 m <br /> (1 cm10 mm <br />0.01 m <br />) +
glandular-pubescent +
not inflated +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Steamboat or eggleaf monkeyflower +
not +, rarely radially symmetric +  and weakly strongly bilabiate +
yellow;yellow patch;magenta;red-purple +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
1300–1900(–2400) m. +
petiole-like +
hairy +  and glabrous +
reflexed;nodding;erect +
reduced +
compressed;asymmetrically ovoid;lanceoloid or nearly cylindric +
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. +
gland-tipped +
alternate +, opposite +, rosulate +  and subrosulate +
persistent +  and deciduous +
reduced +  and equal-sized +
1.2 cm12 mm <br />0.012 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
triangular;deltate +
subequal +
palmate +  and subpinnate +
wing-angled +  and angled +
2 +  and 1 +
chasmogamous +
basal +  and superior +
tenuinucellate +  and unitegmic +
orthotropous +  and anatropous +
orange-yellow +  and redbrown patch +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
rarely more or less equal to or slightly longer +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Flowering Apr–Jun(–Aug). +
Phytoneuron +
flattened +, ovoid +  and oblong +
Endemic +  and Conservation concern +
deciduous +
erect;ascending +
2 cm20 mm <br />0.02 m <br /> (14 cm140 mm <br />0.14 m <br />) +
glandular-puberulent +
glandular-villous +
M. ovatus +
Diplacus ovatus +
Diplacus +
species +
0.9 cm9 mm <br />0.009 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
10 +, 9 +  and 8 +