Erythranthe gemmipara

(W. A. Weber) G. L. Nesom & N. S. Fraga

Phytoneuron 2012-39: 37. 2012.

Common names: Rocky Mountain or petiole-purse monkeyflower
EndemicConservation concern
Basionym: Mimulus gemmiparus W. A. Weber Madroño 21: 423, fig. 1. 1972
Treatment appears in FNA Volume 17. Treatment on page 395. Mentioned on page 379, 396.

Annuals, taprooted. Stems erect, straight at nodes, simple, 1–10 cm, glabrous. Leaves cauline; petiole 2–3 mm, laterally compressed, base deeply saccate, usually containing a lenticular propagule; blade emerging from bulbils, palmately veined, elliptic-ovate to ovate, 2–8 (–10) × 2–5 (–7) mm, base truncate to shallowly cordate, margins entire or remotely denticulate, apex obtuse to rounded, surfaces glabrous. Flowers herkogamous, (1 or) 2–12, from medial or medial to distal nodes. Fruiting pedicels 4–6 mm, slightly longer than calyx, glabrous. Fruiting calyces strongly angled, subcampanulate, weakly inflated, 3–4 mm, margins distinctly toothed or lobed, glabrous, lobes pronounced, erect, incurved-triangular. Corollas yellow, palate yellow, not spotted or striped, bilaterally symmetric, weakly bilabiate; tube-throat broadly cylindric-funnelform, 3–4 mm, exserted beyond calyx margin; lobes subequal, oblong-obovate, throat open, palate puberulent, abaxial ridges low. Styles glabrous. Anthers included, glabrous. Capsules unknown. 2n = 16.


Phenology: Flowering Jul–Aug(–Sep).
Habitat: Granitic seeps, thin soils over bedrock cliff bases, crevices, ledges, talus, among rocks and boulders, Douglas fir, spruce-fir, and aspen forests.
Elevation: 2600–3700 m.

Discussion

Erythranthe gemmipara is known only from Grand, Jefferson, Larimer, and Park counties in north-central Colorado. Flowers in this species are uncommon, and seed set has not been observed in natural populations; reproduction in nature appears to be solely asexual via overwintering propagules (bulbils) formed in leaf axils. Two meristems are initiated in each axil. The proximal meristem produces a pair of starch-thickened storage leaves, a rudimentary axis, and a distal pair of preformed leaf primordia that enclose the shoot apical meristem. Root primordia are present within the first node of the bulbil. The petiole of the subtending leaf expands laterally and folds adaxially to enclose the developing bulbil, and entangled trichomes along the petiole margins secure it following leaf abscission and dispersal. The leaf blades commonly are deciduous, leaving the bulbil still attached (M. R. Beardsley 1997).

Lower Taxa

None.
... more about "Erythranthe gemmipara"
loculicidal +
obtuse +  and rounded +
Guy L. Nesom +  and Naomi S. Fraga +
(W. A. Weber) G. L. Nesom & N. S. Fraga +
rosulate +  and subrosulate +
not persistent +
truncate;shallowly cordate +
Mimulus gemmiparus +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
elliptic-ovate;ovate +
not leathery +  and semifleshy +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
compressed +, inflated +  and tubular +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Rocky Mountain or petiole-purse monkeyflower +
regular +  and bilabiate +
compressed +
2600–3700 m. +
hairy +  and glabrous +
slightly longer +
nodding;spreading;nodding;spreading;erect +
reduced +
Granitic seeps, thin soils over bedrock cliff bases, crevices, ledges, talus, among rocks and boulders, Douglas fir, spruce-fir, and aspen forests. +
alternate +, opposite +, rosulate +  and subrosulate +
persistent +  and deciduous +
pronounced +
3 (?) +  and Not 5 (?) +
oblong-obovate;incurved-triangular +
subequal +
lobed +, toothed +, denticulate +  and entire +
basal +  and superior +
tenuinucellate +  and unitegmic +
orthotropous +  and anatropous +
striped +, not spotted +  and yellow +
compressed +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Flowering Jul–Aug(–Sep). +
lenticular +
Phytoneuron +
beardsley1997a +  and moody1999a +
flattened +  and ellipsoid +
3 +  and 5 +
Endemic +  and Conservation concern +
proximal +  and middle +
straight +
4-angled +  and terete +
1 cm10 mm <br />0.01 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Mimulus sect. Erythranthe +  and Mimulus subg. Synplacus +
Erythranthe gemmipara +
Erythranthe +
species +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
inflated +, subcampanulate +  and angled +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
perennial +  and annual +
herb +  and subshrub +
terrestrial +  and aquatic +
semiaquatic +  and terrestrial +
9 +, 8 +  and 7 +