Erythranthe patula |
Erythranthe regni |
|
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stalk-leaf monkey-flower |
King of Arizona monkeyflower |
|
Habit | Annuals, fibrous-rooted or filiform-taprooted. | Annuals, fibrous-rooted, sometimes rooting at proximal nodes. |
Stems | erect to ascending, straight or geniculate at nodes, usually simple, (3–)5–15(–24) cm, stipitate-glandular, hairs 0.2–0.5 mm, gland-tipped. |
erect to ascending-erect, branched, sometimes becoming slightly fistulose, 15–45 cm, glabrous. |
Leaves | cauline, basal not persistent; petiole (5–)8–25 mm; blade palmately 3-veined, deltate or ovate to ovate-lanceolate, 4–12(–17) × 3–10(–14) mm, base rounded to cuneate-truncate, margins usually denticulate, apex acute to obtuse, surfaces stipitate-glandular, hairs 0.2–0.5 mm, gland-tipped. |
basal and cauline; petiole: proximals 5–25(–30) mm, mid cauline and distals not connate, 0 mm; blade palmately 5–7-veined, proximal sometimes subpinnate, proximals ovate to depressed-orbicular, 15–20(–50) × 15–25(–50) mm, medials and distals broadly depressed-ovate to obtriangular or flabellate, 15–35 mm, largest basal or at mid stem with distal slightly reduced, base attenuate-cuneate, margins shallowly serrate-dentate, sometimes irregularly, to mucronulate or apiculate, teeth (3–)5–7 per side, rarely subentire, apex rounded, surfaces glabrous. |
Flowers | herkogamous, 1–10, from proximal to distal nodes. |
plesiogamous, 6–16, from all nodes or medial to distal, cleistogamous. |
Styles | glabrous. |
glabrous. |
Corollas | yellow, abaxial limb usually with a few red or brownish dots, radially or bilaterally symmetric, regular or weakly bilabiate; tube-throat funnelform, 7–8 mm, exserted beyond calyx margin; lobes oblong, apex rounded to truncate. |
yellow, not red-dotted, bilaterally or radially symmetric, bilabiate or regular; tube-throat cylindric-funnelform, 9–12 mm, exserted 3–5 mm beyond calyx margin; limb expanded 1–1.5 mm. |
Fruiting pedicels | 10–25(–38) mm, stipitate-glandular, hairs 0.2–0.5 mm, gland-tipped. |
15–30 mm, longer than subtending leaves, glabrous. |
Fruiting calyces | tubular, weakly or not inflated, 5–6(–7) mm, margins distinctly toothed or lobed, sparsely stipitate-glandular to sparsely hirtellous, lobes pronounced, erect. |
sparsely purple-dotted, broadly campanulate-cylindric, inflated, sagittally compressed, 7–9 mm, glabrous, throat not closing, adaxial lobe longest. |
Capsules | included, 4–6 mm. |
included, 4–5 mm. |
Anthers | included, glabrous. |
included, glabrous. |
2n | = 32. |
|
Erythranthe patula |
Erythranthe regni |
|
Phenology | Flowering Apr–May(–Aug). | Flowering Mar–May. |
Habitat | Ephemeral seeps, springs, rocky stream banks, moist basalt, fine gravel on bedrock, muddy hillside seeps, crevices. | Moist to wet, sandy loam soils. |
Elevation | 200–1900(–2900) m. (700–6200(–9500) ft.) | 800–1000 m. (2600–3300 ft.) |
Distribution |
ID; MT; OR; WA; WY; AB; BC
|
AZ |
Discussion | Erythranthe patula is distinctive with its long-petiolate leaves with ovate blades and its small, weakly bilabiate to nearly radially symmetric corollas. Vestiture may include only minute, stipitate-glandular hairs or it may be an intergrading mix of stipitate-glandular hairs and minute (0.1–0.2 mm), sharp-pointed, eglandular hairs. Plants may have stipitate-glandular pedicels and calyces but hirtellous, eglandular stems, or they may have stipitate-glandular stems and pedicels but hirtellous calyces. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Erythranthe regni is endemic to the Kofa Mountains of Yuma County; all collections have been made from the Kofa Game Refuge (Kofa National Wildlife Refuge). Because its calyces remain open at maturity, this species is hypothesized to be most closely related to E. geyeri, from which it differs by its erect habit, apparently annual duration, larger leaves, purple-dotted calyces, and corollas with longer tube-throat and barely bilabiate limb. Geography and other morphology, however, suggest that its evolutionary origins are closer to E. guttata. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 17, p. 397. | FNA vol. 17, p. 406. |
Parent taxa | Phrymaceae > Erythranthe | Phrymaceae > Erythranthe |
Sibling taxa | ||
Synonyms | Mimulus patulus | |
Name authority | (Pennell) G. L. Nesom: Phytoneuron 2012-39: 39. (2012) | G. L. Nesom: Phytoneuron 2012-40: 24. (2012) |
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