Erythranthe decora |
Erythranthe michiganensis |
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mannered monkeyflower, northwestern monkey -flower, sharp-leaf monkey-flower, showy monkey-flower |
Michigan monkeyflower |
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Habit | Perennials, rhizomatous, sometimes producing numerous, long, remotely leafy runners from basal cauline nodes. | Perennials, rhizomatous, usually producing numerous leafy stolons from basal nodes, rooting at distal nodes, sometimes forming mats. |
Stems | erect, simple, 20–100 cm, distals densely, minutely hirtellous. |
ascending-erect or basally decumbent, becoming erect in inflorescence, branched, 12–50(–70) cm, glabrous or minutely hirtellous and stipitate-glandular. |
Leaves | cauline, basal usually not persistent; petiole: proximals 8–25 mm, midcauline 3–5 mm, distalmost 0 mm; blade palmately (3–)5–7-veined, broadly ovate-triangular to ovate-lanceolate, 20–50(–60) × 10–30(–40) mm, usually 1–2 times longer than wide, base rounded to truncate to shallowly cuneate, margins dentate, teeth sharp-pointed, apex acute, surfaces sometimes glabrate, distals densely, minutely hirtellous. |
cauline, basal not persistent; petiole 1–5(–15) mm, mid stem and distals 0 mm; blade palmately 3–5-veined, broadly ovate to broadly ovate-elliptic or suborbicular, 8–30 mm, relatively even-sized or diminishing in size distally, bracteal reduced, slightly falcate, base truncate to cuneate, margins evenly or unevenly dentate-serrate to dentate, teeth 3–8 per side, apex usually rounded, surfaces glabrous or minutely hirtellous and stipitate-glandular. |
Flowers | herkogamous, (1 or)2–7(–14), from distal nodes. |
herkogamous, 2–14, mostly from distal nodes or medial to distal nodes. |
Styles | minutely, prominently hirsutulous to villosulous. |
glabrous. |
Corollas | yellow to chrome yellow, throat floor and tube usually red-spotted, bilaterally symmetric, bilabiate; tube-throat broadly funnelform, 18–26 mm, exserted (8–)10–15 mm beyond calyx margin; limb expanded 22–30 mm. |
yellow, sometimes faintly red-spotted, bilaterally symmetric, strongly bilabiate; tube-throat cylindric-campanulate, 10–14 mm, exserted 5–8 mm beyond calyx margin; limb expanded 10–15 mm. |
Fruiting pedicels | 18–35(–40) mm, distals densely, minutely hirtellous, hairs often slightly deflexed. |
10–25 mm, villous-glandular to minutely villosulous-glandular. |
Fruiting calyces | green, sometimes red-spotted, ovoid, inflated, sagittally compressed, 15–19 mm, distals densely, minutely hirtellous, throat closing, lobe margins (sinuses) villous. |
cylindric-campanulate, inflated, sagittally compressed, 7–10 mm, puberulous to softly hirtellous, mixed with longer, stipitate-glandular hairs, throat not closing, adaxial lobe 2 times longer than others, slightly upcurving. |
Capsules | included, 8–10 mm. |
unknown. |
Anthers | included, glabrous. |
included, glabrous. |
2n | = (28)30. |
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Erythranthe decora |
Erythranthe michiganensis |
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Phenology | Flowering May–Aug. | Flowering Jun–Aug(–Oct). |
Habitat | River banks, streamsides, dripping banks, moist meadows. | Cold calcareous springs, seeps, depressions, streams, alkaline shorelines at mouths of small drainages, steep moraine slopes, bluff bases, commonly in northern white cedar swamps. |
Elevation | 1000–1600 m. (3300–5200 ft.) | 500–600 m. (1600–2000 ft.) |
Distribution |
ID; OR; WA; BC
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MI |
Discussion | Erythranthe decora is distinct in its uniformly ovate to ovate-lanceolate leaf blades with truncate bases and regularly toothed margins, relatively long internodes, rhizomatous habit, mostly unbranched stems, often with leafy runners from basal nodes, large corollas, hairy styles, and minutely hirtellous stems, pedicels, calyces, and leaf surfaces. The densely produced rhizomes suggest a relationship with the E. tilingii group. A population in Clearwater County, Idaho, appears to be long-disjunct from the main range of the species in northwestern Oregon and the western half of Washington. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Based on data from allozyme and RAPD studies, morphology, and crossing studies, A. L. Posto and L. A. Prather (2003) raised Erythranthe [Mimulus] michiganensis to specific rank. The species is endemic to a small area in the Mackinac Straits and Grand Traverse regions of Michigan; it is known to be extant at 15 sites and apparently is extinct at three previously known sites. Plants of all but one of the populations are essentially pollen-sterile and reproduce through rhizomes. However, the didynamous stamens and stigma positioned above the adaxial anther pair, along with the relatively large corollas with broadly expanded limb, are reflective of an allogamous breeding system, which seems unusual in view of its apparent sterility. The narrow geographic distribution of E. michiganensis lies within the wider range of E. geyeri, and the two are known to co-occur at two sites, apparently without hybridization or morphologically intermediate individuals. Erythranthe michiganensis (as Mimulus michiganensis) is in the Center for Plant Conservation’s National Collection of Endangered Plants. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 17, p. 414. | FNA vol. 17, p. 407. |
Parent taxa | Phrymaceae > Erythranthe | Phrymaceae > Erythranthe |
Sibling taxa | ||
Synonyms | Mimulus guttatus var. decorus, M. decorus | Mimulus glabratus subsp. michiganensis, M. glabratus var. michiganensis, M. michiganensis |
Name authority | (A. L. Grant) G. L. Nesom: Phytoneuron 2012-39: 43. (2012) | (Pennell) G. L. Nesom: Phytoneuron 2012-39: 44. (2012) |
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