Flora of North America species comparison

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Erythranthe ptilota

Erythranthe hymenophylla

musk monkeyflower, musk-flower, sessile-leaf monkey-flower, wing-leaf monkeyflower

thin-sepal monkeyflower
Habit Perennials, rhizomatous, sometimes rooting at proximal nodes. Annuals, filiform-taprooted.
Stems

prostrate, sometimes decumbent to ascending, few-branched, 20–80 cm, villous, hairs 1–2 mm, eglandular, sometimes mixed with much shorter stipitate-glandular ones, internodes evident.

prostrate to ascending-erect, sharply bent at basal nodes, simple or few-branched, 5–25 cm, glandular-puberulent to glandular-villous, hairs 0.1–0.8 mm, vitreous, flattened, multicellular, gland-tipped.
Leaves

cauline, basal not persistent, often congested;

petiole 0 mm, rarely 1–2(–3) mm;

blade pinnately veined, oblong-lanceolate, 30–70 × 10–22 mm, base rounded, margins denticulate to dentate, apex acute, surfaces villous, hairs 1–2 mm, eglandular, sometimes mixed with much shorter stipitate-glandular ones.

basal and cauline, largest at mid stem;

petiole 6–30 mm;

blade pinnately veined, broadly lanceolate to ovate, 10–35 × 10–30 mm, distinctly membranous, base cuneate to shallowly cordate, margins coarsely dentate to shallowly denticulate or entire, apex acute to obtuse, surfaces glandular-puberulent to glandular-villous, hairs 0.1–0.8 mm, vitreous, flattened, multicellular, gland-tipped, glandular.
Flowers

herkogamous, 4–10, from medial to distal nodes.

herkogamous, 1–6, from proximal to distal nodes.
Styles

glabrous.

glabrous.
Corollas

yellow, throat with fine blackish or brownish lines on all sides, weakly bilaterally or nearly radially symmetric, weakly bilabiate or nearly regular;

tube-throat narrowly campanulate, 15–18 mm, exserted beyond calyx margin;

lobe apex rounded.

light yellow, throat and abaxial lobes red- or purple-spotted, sometimes with small white patches, bilaterally symmetric, weakly bilabiate;

tube-throat funnelform, 10–14 mm, exserted beyond calyx margin;

lobes obovate-oblong, apex rounded to truncate or notched.
Fruiting pedicels

(15–)22–50 mm, villous, hairs 1–2 mm, eglandular, sometimes mixed with much shorter stipitate-glandular ones.

divergent at right angles from stem, usually closely paired, 10–45 mm, negatively phototropic, causing capsules to be pressed against a cliff face or crevice at time of dehiscence, glandular-puberulent to glandular-villous, hairs 0.1–0.8 mm, vitreous, flattened, multicellular, gland-tipped.
Fruiting calyces

wing- or plicate-angled, cylindric-campanulate, weakly inflated, 10–12 mm, villous-glandular, hairs gland-tipped, lobes distinctly spreading, strongly unequal, linear-lanceolate to narrowly triangular, 5–9 mm, apex long acuminate-apiculate.

angled, tubular-campanulate, slightly inflated, 5–7 mm, margins distinctly toothed or lobed, sparsely stipitate-glandular, lobes pronounced, erect.
Capsules

included, 6–8 mm.

included, 3–6 mm.
Anthers

included, finely hirtellous to hispidulous.

included, glabrous.
2n

= 32.

Erythranthe ptilota

Erythranthe hymenophylla
Phenology Flowering (May–)Jun–Aug. Flowering Apr–Aug(–Sep).
Habitat Creek banks, gravel bars, flood plains, shallow ditches and natural drainages, swales, damp banks, wet sand, moist soils in coniferous woods, marshes, bogs. Steep, seasonally moist, basalt cliffs with west or southwest exposure, mesic coniferous forests.
Elevation 0–1000(–1900) m. (0–3300(–6200) ft.) 800–1300 m. (2600–4300 ft.)
Distribution
from FNA
CA; OR; WA; BC
[WildflowerSearch map]
from FNA
ID; MT; OR
Discussion

Erythranthe ptilota is recognized by its prostrate to decumbent or decumbent-ascending habit, large, consistently sessile leaves, densely villous vestiture, long pedicels, large calyces and corollas, hispid-hirtellous anthers, and particularly by its long, strongly unequal, linear-triangular calyx lobes usually distally falcate. Leaf bases typically are truncate to rounded or subcordate. Rarely the leaves are short-petiolate, but in such cases, the distinctive leaf bases, vestiture, calyx morphology, and pubescent anthers are diagnostic. Erythranthe ptilota is widely sympatric with E. moschata but usually occurs at lower elevations and characteristically in wetter habitats. The epithet ptilota (Greek ptilotos, winged) alludes to a fancied winglike aspect of the pairs of sessile leaves.

A population system of Erythranthe ptilota-like plants occurs in southern California, about 480 km disjunct from the main range of the species. These plants have the prostrate habit, large leaves, long pedicels, and large corollas of E. ptilota, but the calyx lobes are variable in length and usually do not show the characteristic attenuate-apiculate apices. The southern California plants are identified here as E. moschata.

Erythranthe ptilota is a new name at specific rank for Mimulus moschatus var. sessilifolius [not E. sessilifolia (Maximowicz) G. L. Nesom].

(Discussion copyrighted by Flora of North America; reprinted with permission.)

In the protologue, R. J. Meinke observed that plants of Erythranthe hymenophylla have reflexed fruiting pedicels that increase seed dispersal back onto the vertical cliff wall, the characteristic habitat of the species. The hanging habit of E. hymenophylla is reflected in a sharp (90º to 180º) bend in the basal nodes and the long pedicels that are closely paired and divergent in parallel at about right angles from the stem. The species also is characterized by it very short calyx to corolla length, relatively short capsules, and large seeds.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 402. FNA vol. 17, p. 397.
Parent taxa Phrymaceae > Erythranthe Phrymaceae > Erythranthe
Sibling taxa
E. acutidens, E. alsinoides, E. ampliata, E. androsacea, E. arenaria, E. arenicola, E. arvensis, E. barbata, E. bicolor, E. brachystylis, E. breviflora, E. breweri, E. caespitosa, E. calcicola, E. calciphila, E. cardinalis, E. carsonensis, E. charlestonensis, E. chinatiensis, E. cinnabarina, E. corallina, E. cordata, E. decora, E. dentata, E. diffusa, E. discolor, E. eastwoodiae, E. erubescens, E. exigua, E. filicaulis, E. filicifolia, E. floribunda, E. gemmipara, E. geniculata, E. geyeri, E. glaucescens, E. gracilipes, E. grandis, E. grayi, E. guttata, E. hallii, E. hardhamiae, E. hymenophylla, E. inamoena, E. inconspicua, E. inflatula, E. jungermannioides, E. laciniata, E. latidens, E. lewisii, E. linearifolia, E. marmorata, E. michiganensis, E. microphylla, E. minor, E. montioides, E. moschata, E. nasuta, E. norrisii, E. nudata, E. palmeri, E. pardalis, E. parishii, E. parvula, E. patula, E. percaulis, E. primuloides, E. pulsiferae, E. purpurea, E. regni, E. rhodopetra, E. rubella, E. scouleri, E. shevockii, E. sierrae, E. suksdorfii, E. taylorii, E. thermalis, E. tilingii, E. trinitiensis, E. unimaculata, E. utahensis, E. verbenacea, E. washingtonensis, E. willisii
E. acutidens, E. alsinoides, E. ampliata, E. androsacea, E. arenaria, E. arenicola, E. arvensis, E. barbata, E. bicolor, E. brachystylis, E. breviflora, E. breweri, E. caespitosa, E. calcicola, E. calciphila, E. cardinalis, E. carsonensis, E. charlestonensis, E. chinatiensis, E. cinnabarina, E. corallina, E. cordata, E. decora, E. dentata, E. diffusa, E. discolor, E. eastwoodiae, E. erubescens, E. exigua, E. filicaulis, E. filicifolia, E. floribunda, E. gemmipara, E. geniculata, E. geyeri, E. glaucescens, E. gracilipes, E. grandis, E. grayi, E. guttata, E. hallii, E. hardhamiae, E. inamoena, E. inconspicua, E. inflatula, E. jungermannioides, E. laciniata, E. latidens, E. lewisii, E. linearifolia, E. marmorata, E. michiganensis, E. microphylla, E. minor, E. montioides, E. moschata, E. nasuta, E. norrisii, E. nudata, E. palmeri, E. pardalis, E. parishii, E. parvula, E. patula, E. percaulis, E. primuloides, E. ptilota, E. pulsiferae, E. purpurea, E. regni, E. rhodopetra, E. rubella, E. scouleri, E. shevockii, E. sierrae, E. suksdorfii, E. taylorii, E. thermalis, E. tilingii, E. trinitiensis, E. unimaculata, E. utahensis, E. verbenacea, E. washingtonensis, E. willisii
Synonyms Mimulus moschatus var. sessilifolius Mimulus hymenophyllus
Name authority G. L. Nesom: Phytoneuron 2017-17: 4. (2017) (Meinke) G. L. Nesom: Phytoneuron 2012-39: 38. (2012)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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