Erythranthe purpurea |
Erythranthe michiganensis |
|
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little purple monkeyflower, purple monkeyflower |
Michigan monkeyflower |
|
Habit | Annuals, taprooted. | Perennials, rhizomatous, usually producing numerous leafy stolons from basal nodes, rooting at distal nodes, sometimes forming mats. |
Stems | erect, simple or branched from basal nodes, 3–10 cm, minutely puberulent. |
ascending-erect or basally decumbent, becoming erect in inflorescence, branched, 12–50(–70) cm, glabrous or minutely hirtellous and stipitate-glandular. |
Leaves | cauline, basal not persistent; petiole 0 mm; blade palmately 3–5-veined, elliptic to lanceolate, 4–15 × 1–5 mm, base truncate to truncate-cordate, clasping, margins entire, sometimes toothed, apex acute to obtuse, surfaces minutely puberulent. |
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, 1–22, from distal or medial to distal nodes. |
herkogamous, 2–14, mostly from distal nodes or medial to distal nodes. |
Styles | glabrous. |
glabrous. |
Corollas | pink to purple, adaxial limb darker than abaxial, abaxial limb with yellow markings, bilaterally symmetric, strongly bilabiate; tube-throat cylindric to funnelform, 7–13 mm, exserted beyond calyx margin; limb expanded 7–10 mm, bilabiate, 3 abaxial lobes notched, 2 adaxial nearly entire, abaxial limb sparsely bearded. |
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 | ascending to often spreading horizontally, 13–57(–70) mm. |
10–25 mm, villous-glandular to minutely villosulous-glandular. |
Fruiting calyces | becoming reddish, campanulate, 3–8 mm, margins distinctly toothed or lobed, minutely puberulent, ribs thickened, lobes pronounced, erect, margins glabrous. |
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, 3–8 mm. |
unknown. |
Anthers | included, glabrous. |
included, glabrous. |
2n | = (28)30. |
|
Erythranthe purpurea |
Erythranthe michiganensis |
|
Phenology | Flowering May–Jun. | Flowering Jun–Aug(–Oct). |
Habitat | Moist openings along streams, swales, and depressions, pine duff in yellow pine forests, margins of dry 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 | 1900–2800 m. (6200–9200 ft.) | 500–600 m. (1600–2000 ft.) |
Distribution |
CA; Mexico (Baja California)
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MI |
Discussion | Erythranthe purpurea is restricted to the San Bernardino Mountains in San Bernardino County and is disjunct in the Sierra San Pedro Mártir in Baja California, Mexico. (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. 388. | FNA vol. 17, p. 407. |
Parent taxa | Phrymaceae > Erythranthe | Phrymaceae > Erythranthe |
Sibling taxa | ||
Synonyms | Mimulus purpureus, M. purpureus var. pauxillus | Mimulus glabratus subsp. michiganensis, M. glabratus var. michiganensis, M. michiganensis |
Name authority | (A. L. Grant) N. S. Fraga: Phytoneuron 2012-39: 35. (2012) | (Pennell) G. L. Nesom: Phytoneuron 2012-39: 44. (2012) |
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