Erythranthe linearifolia |
Erythranthe discolor |
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primrose monkeyflower, threadleaf primrose monkeyflower |
party-color monkeyflower, two-color monkeyflower |
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Habit | Perennials, rhizomatous, densely cespitose, forming large patches and turfs 0.3–1 m diam. | Annuals, taprooted. |
Stems | erect to ascending, simple, 2–10 cm, sparsely hirsute and stipitate-glandular, internodes shortened. |
erect, simple or branched from basal nodes, 5–12 cm, sparsely glandular-pubescent, internodes elongate, distinct. |
Leaves | basal or near basal, sometimes proximal cauline, subrosulate; petiole 0 mm; blade 1-veined or palmately 3-veined, linear to narrowly oblanceolate, 15–50 × 1.5–5 mm, base long-cuneate, often subclasping, margins entire, dentate-serrate, or distally dentate, apex acute, surfaces glabrous or adaxial sparsely short-pilose, eglandular. |
cauline, basal not persistent; petiole 0–2 mm; blade 1-veined or palmately 3-veined (in broader ones), linear to lanceolate or ovate, 5–15 × 1–4 mm, base attenuate, margins entire, apex acute, surfaces sparsely glandular-pubescent. |
Flowers | herkogamous, 1. |
herkogamous, 1–8, from distal or medial to distal nodes. |
Styles | glabrous. |
glabrous. |
Corollas | yellow, red-spotted or -striped, bilaterally symmetric, weakly bilabiate, loosely hirsute on abaxial side of opening; tube-throat narrowly campanulate, 18–22 mm, exserted beyond calyx margin; lobes broadly obovate-oblong, apex rounded- or truncate-notched, throat open. |
yellow and tube-throat adaxial surface red-tinged, abaxial limb red-spotted or deep pink to purple and abaxial limb with 2 yellow ridges, bilaterally symmetric, strongly bilabiate; tube-throat funnelform, 9–13 mm, exserted beyond calyx margin; limb expanded 7–15 mm, lobes notched, adaxial limb glabrous or sparsely bearded. |
Fruiting pedicels | (40–)65–85(–120) mm, glabrous or sparsely stipitate-glandular near base. |
erect to ascending, 6–11(–32) mm. |
Fruiting calyces | winged- or plicate-angled, tubular-campanulate, weakly or not inflated, 9–10(–12) mm, glabrous. |
sometimes red-dotted on ribs, campanulate, 4–8 mm, margins distinctly toothed or lobed, sparsely glandular-pubescent, ribs weak, lobes pronounced, erect, margins glabrous. |
Capsules | included, 6–7 mm. |
included, 5–8 mm. |
Anthers | included or slightly exserted, margins ciliate, glabrous. |
included, glabrous. |
Erythranthe linearifolia |
Erythranthe discolor |
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Phenology | Flowering Jul–Sep. | Flowering May–Jun. |
Habitat | Wet banks, Darlingtonia seeps and bogs, seepages in serpentine talus. | Moist open areas on gentle slopes in desert chaparral and pine transition areas. |
Elevation | 600–2800 m. (2000–9200 ft.) | 1400–2700 m. (4600–8900 ft.) |
Distribution |
CA
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CA
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Discussion | Erythranthe linearifolia is endemic to serpentine substrates in Shasta, Siskiyou, and Trinity counties; typical E. primuloides occurs in the same area but not on serpentine. Erythranthe linearifolia is distinct from E. primuloides especially in its narrow leaves and cespitose habit. A collection from Tulare County appears to be E. linearifolia (Shevock 10597, CAS), but this appears to be far out of range and the voucher should be reexamined; it probably is better identified as an unusual collection of E. primuloides. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Erythranthe discolor has two distinctive floral morphs; one is yellow with red spots on the palate, the other is pink with two yellow ridges on the palate. Populations can be monomorphic (usually yellow) or mixed, with the yellow morph most often in higher frequency. Erythranthe discolor was placed previously in synonymy with E. montioides, and the pink form of E. discolor has commonly been confused with E. palmeri. Erythranthe discolor is known to hybridize with E. barbata and is restricted to Kern and Tulare counties in the southern Sierra Nevada. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 17, p. 390. | FNA vol. 17, p. 386. |
Parent taxa | Phrymaceae > Erythranthe | Phrymaceae > Erythranthe |
Sibling taxa | ||
Synonyms | Mimulus primuloides var. linearifolius, M. linearifolius, M. primuloides subsp. linearifolius | Mimulus discolor |
Name authority | (A. L. Grant) G. L. Nesom & N. S. Fraga: Phytoneuron 2012-39: 35. (2012) | (A. L. Grant) N. S. Fraga: Phytoneuron 2012-39: 35. (2012) |
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