Erythranthe parvula

(Wooton & Standley) G. L. Nesom

Phytoneuron 2012-39: 44. 2012.

Common names: Southwestern mat monkeyflower
Basionyms: Mimulus parvulus Wooton & Standley Contr. U.S. Natl. Herb. 16: 171. 1913
Treatment appears in FNA Volume 17. Treatment on page 424. Mentioned on page 374.

Perennials, rhizomatous, sometimes rooting at nodes, mat-forming. Stems procumbent, branched, 5–15 cm, stipitate-glandular distally. Leaves cauline; petiole 1–4 mm; blade palmately 3-veined, ovate to orbicular-ovate or depressed-ovate, 3–11 × 3–9 mm, base truncate to cuneate, margins shallowly denticulate to dentate, teeth 3–5 per side, apex acute to obtuse, surfaces villous-hirsute, hairs whitish, thickened, flattened, stiff, gland-tipped. Flowers plesiogamous, 2–8, axillary at distal nodes. Fruiting pedicels 7–15 mm, minutely stipitate-glandular. Fruiting calyces nodding 45–90º, 5-lobed, cylindric-ovoid, inflated, sagittally compressed, 4–5 mm, villous-hirsute, throat closing. Corollas yellow, red-dotted, bilaterally symmetric, bilabiate; tube-throat funnelform, 6–8 mm, exserted beyond calyx margin; limb expanded 4–6 mm, abaxial limb spreading, lobes fimbriate. Styles glabrous. Anthers included, glabrous. Capsules included, 3–4 mm. 2n = 32.


Phenology: Flowering Apr–Sep.
Habitat: Wet vertical rock faces, ledges, and rocky slopes, seepy wash banks.
Elevation: 500–2400(–3400) m.

Distribution

Ariz., N.Mex., Mexico (Sonora)

Discussion

All monkeyflowers with laciniate-lobed corollas have generally been identified as Mimulus dentilobus B. L. Robinson & Fernald, but these occur as three, morphologically distinct, widely allopatric population systems, each of which is regarded as a separate species (G. L. Nesom 2012g). Erythranthe dentiloba (B. L. Robinson & Fernald) G. L. Nesom, which is endemic to Mexico, is the only one of the three with an allogamous breeding system. Erythranthe parvula is restricted to Arizona and New Mexico except for one locality in northern Sonora, Mexico. Erythranthe chinatiensis is the third species of the group.

Selected References

None.

Lower Taxa

None.

... more about "Erythranthe parvula"
loculicidal +
Acute (?) +  and Obtuse (?) +
Guy L. Nesom +  and Naomi S. Fraga +
(Wooton & Standley) G. L. Nesom +
rosulate +  and subrosulate +
not persistent +
truncate;cuneate +
Mimulus parvulus +
0.3 cm3 mm <br />0.003 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
ovate;orbicular-ovate or depressed-ovate +
not leathery +  and semifleshy +
3mm;9mm +
compressed +, inflated +  and tubular +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Southwestern mat monkeyflower +
red-dotted;yellow +
Ariz. +, N.Mex. +  and Mexico (Sonora) +
500–2400(–3400) m. +
hairy +  and glabrous +
nodding;spreading;nodding;spreading;erect +
stipitate-glandular +
0.7 cm7 mm <br />0.007 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
reduced +
Wet vertical rock faces, ledges, and rocky slopes, seepy wash banks. +
gland-tipped +
flattened +
alternate +, opposite +, rosulate +  and subrosulate +
persistent +  and deciduous +
expanded +
3 +  and not 5 +
fimbriate +
reduced +  and longer +
shallowly denticulate +  and dentate +
basal +  and superior +
tenuinucellate +  and unitegmic +
orthotropous +  and anatropous +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Flowering Apr–Sep. +
Phytoneuron +
flattened +  and ellipsoid +
3 +  and 5 +
proximal +  and middle +
erect;decumbent +
4-angled +  and terete +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
villous-hirsute +
Mimulus sect. Erythranthe +  and Mimulus subg. Synplacus +
Erythranthe parvula +
Erythranthe +
species +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
rooting +  and rhizomatous +
compressed +, inflated +, cylindric-ovoid +  and 5-lobed +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
perennial +  and annual +
herb +  and subshrub +
terrestrial +  and aquatic +
semiaquatic +  and terrestrial +
9 +, 8 +  and 7 +