Erythranthe utahensis

(Pennell) G. L. Nesom

Phytoneuron 2012-39: 44. 2012.

Common names: Utah monkeyflower
Endemic
Basionym: Mimulus glabratus subsp. utahensis Pennell Monogr. Acad. Nat. Sci. Philadelphia 1: 123. 1935
Treatment appears in FNA Volume 17. Treatment on page 410. Mentioned on page 374, 411.

Perennials, rhizomatous, rooting at nodes, rhizomes filiform. Stems erect, sometimes decumbent-ascending proximally, simple or few-branched, 20–50 cm, glabrous or sparsely stipitate-glandular in inflorescence. Leaves basal and cauline, even-sized or largest near mid stem; petiole 0 mm or proximalmost 2–10 mm; blade palmately 3–5-veined, orbicular or suborbicular to broadly elliptic, broadly ovate, or depressed-ovate, 20–40(–75) × 12–35(–40) mm, base usually truncate to broadly cuneate, margins entire or subentire to mucronulate, shallowly dentate, or denticulate, apex rounded, surfaces glabrous or glabrate to sparsely stipitate-glandular and sparsely pilose, hairs thin-walled, abaxial often glaucous. Flowers herkogamous, 6–16, from proximal to distal nodes, in a loose raceme, distal bracts becoming much reduced. Fruiting pedicels (25–)40–75 mm, stipitate-glandular to short villous, hairs gland-tipped. Fruiting calyces broadly ovate-cylindric, inflated, sagittally compressed, (10–)11–17(–20) mm, stipitate-glandular or minutely hirtellous or a mixture, hairs sometimes also longer, thin-walled, eglandular or glandular, throat not closing, adaxial lobe slightly longer, triangular-blunt. Corollas yellow, abaxial limb prominently darker yellow, sparsely purple-spotted, bilaterally symmetric, weakly bilabiate; tube-throat narrowly funnelform to broadly cylindric, 10–15 mm, exserted 5–8 mm beyond calyx margin; limb expanded 12–20 mm. Styles hirtellous. Anthers included, glabrous. Capsules included, 5–7 mm. 2n = 28, 30.


Phenology: Flowering (Feb–)May–Aug(–Oct).
Habitat: Drainage ditches, springs, seeps, wet meadows, margins of ponds and small streams, marshy areas.
Elevation: 1400–2500 m.

Distribution

Calif., Colo., Nev., Utah.

Discussion

Erythranthe utahensis is characterized by its erect stems, prolifically produced filiform rhizomes, basal leaves short-petiolate to subsessile and cauline sessile, blades suborbicular to broadly ovate or depressed ovate with thin-walled villous-glandular hairs on both surfaces, margins subentire, proximal pedicels elongating to 75 mm, and calyces open at maturity.

Selected References

None.

Lower Taxa

None.
... more about "Erythranthe utahensis"
Guy L. Nesom +  and Naomi S. Fraga +
(Pennell) G. L. Nesom +
Mimulus glabratus subsp. utahensis +
Utah monkeyflower +
Calif. +, Colo. +, Nev. +  and Utah. +
1400–2500 m. +
Drainage ditches, springs, seeps, wet meadows, margins of ponds and small streams, marshy areas. +
Flowering (Feb–)May–Aug(–Oct). +
Phytoneuron +
Mimulus sect. Erythranthe +  and Mimulus subg. Synplacus +
Erythranthe utahensis +
Erythranthe +
species +