Flora of North America species comparison

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Erythranthe tilingii

Erythranthe percaulis

larger mountain monkeyflower, mountain monkey-flower, Tiling's monkey-flower

serpentine canyon monkeyflower
Habit Perennials, rhizomatous, solitary to weakly colonial, rhizomes forming a mass, yellowish, branching, filiform. Annuals, fibrous-rooted.
Stems

erect-ascending, usually freely branched, 2–35 cm, glabrous or sparsely stipitate-glandular to short glandular-villous.

erect or slightly ascending from base, often purplish, simple or few-branched from basal nodes, 7–28 cm, glabrous.
Leaves

cauline;

petiole 0–25 mm, distals 0 mm;

blade palmately 3–5-veined, ovate to lanceolate-triangular or narrowly lanceolate (broadly ovate in large-leaved forms), 5–35(–55) mm, base cuneate to attenuate, margins irregularly denticulate, apex acute to obtuse or rounded, surfaces glabrous, sparsely stipitate-glandular to short glandular-villous, glabrate, or sparsely to moderately villous, hairs thick-vitreous, eglandular.

basal and cauline;

petiole: basal and proximalmost cauline 5–10 mm or cauline 0 mm;

blade often spreading at right angles to stem, purple, palmately 3–5-veined, narrowly ovate, rhombic-elliptic, ovate to lanceolate, or elliptic-lanceolate to ovate or oblong-ovate, 7–10 mm, cauline even-sized or slightly smaller distally, 4–10 mm, base truncate to attenuate, margins entire or proximals shallowly sinuate, serrations 2–4, shallow, apex rounded, surfaces glabrous.
Flowers

herkogamous, 1–3(–5), from distal nodes.

herkogamous, 8–12, usually on distal 2/3 of stem, not clustered, chasmogamous.
Styles

hirtellous.

glabrous.
Corollas

yellow, red-dotted, bilaterally symmetric, bilabiate;

tube-throat broadly funnelform, 15–28 mm, exserted 5–10 mm beyond calyx margin;

limb expanded 14–30 mm.

yellow, throat floor with a few red dots, proximal middle lip base with a larger red splotch, bilaterally symmetric, bilabiate;

tube-throat cylindric-funnelform, 4–6 mm, exserted 2–3 mm beyond calyx margin;

limb expanded 4–5 mm, palate ridges yellow, densely hairy.
Fruiting pedicels

15–35(–40) mm, sparsely stipitate-glandular to short glandular-villous.

15–35 mm, glabrous.
Fruiting calyces

usually purple-tinged and purple-dotted, broadly campanulate, inflated, sagittally compressed, 11–15 mm, glabrous or sparsely stipitate-glandular to short glandular-villous, villous at sinuses, throat closing, lobes broadly ovate, abaxial usually longer than lateral, adaxial at least 2 times as long as others.

sharply wing-angled, urceolate to urceolate-campanulate, inflated, sagittally compressed, (4–)5–6 mm, glabrous, throat closing.
Capsules

included, 5–7 mm.

included, 3 mm.
Anthers

included, glabrous.

included, glabrous.
2n

= 28, 56.

Erythranthe tilingii

Erythranthe percaulis
Phenology Flowering Jul–Sep. Flowering May–Jun.
Habitat Seeps, springs, stream banks, shallow rivulets, cliff bases, ledges and crevices, steep gravelly slopes, wet meadows. Soil pockets, crevices, and boulders on serpentine cliffs, slopes, and roadcuts.
Elevation 1400–3400 m. (4600–11200 ft.) 2800 m. (9200 ft.)
Distribution
from FNA
AZ; CA; ID; MT; NV; OR; UT; AB
[WildflowerSearch map]
from FNA
CA
Discussion

Plants of Erythranthe tilingii are characterized by their relatively low stature and stems arising from a system of thin rhizomes and producing mostly one to three large flowers each; they usually occur at relatively high elevations. Erythranthe tilingii sometimes has been considered to include one or several infraspecific entities; from within this taxonomic amalgam, four distinct species are recognized here: E. caespitosa, E. corallina, E. minor, and E. tilingii. Erythranthe corallina and E. minor probably are more closely related to E. guttata. The populations identified here as E. tilingii from northeastern Oregon northeast to Alberta and southeast to Utah may prove to be a separate (undescribed) species.

Erythranthe tilingii in the strict sense is relatively widespread over the western United States and is sympatric with E. caespitosa and E. corallina. Leaves in E. tilingii are variable in size, and particularly in Idaho, they may approach the small size of those of E. caespitosa, but the leaf margins of E. tilingii are distinctly toothed, and the stems are taller and more erect. Across the range of the species, plants sometimes produce very large leaves, but these often occur on plants with characteristically smaller leaves. This wide variability in size apparently does not occur in E. caespitosa.

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

Erythranthe percaulis was described from only the type collection from Serpentine Canyon of the Feather River in Plumas County, but the type locality has recently been relocated and the population determined to comprise many thousands of individuals (S. Schoenig 2016). Plants are characterized by their completely glabrous vestiture, terete and mostly simple stems, small leaves on relatively widely spaced nodes, small calyces, and small, yellow corollas with herkogamous arrangement of stigma and anthers.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 408. FNA vol. 17, p. 418.
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. ptilota, E. pulsiferae, E. purpurea, E. regni, E. rhodopetra, E. rubella, E. scouleri, E. shevockii, E. sierrae, E. suksdorfii, E. taylorii, E. thermalis, 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. 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. 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 tilingii, M. caespitosus var. implexus, M. implexus, M. implicatus, M. langsdorffii var. tilingii, M. lucens, M. veronicifolius
Name authority (Regel) G. L. Nesom: Phytoneuron 2012-39: 44. (2012) G. L. Nesom: Phytoneuron 2013-70: 1, figs. 1–5. (2013)
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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