Flora of North America species comparison

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Erythranthe primuloides

Erythranthe inamoena

primrose monkey-flower

Texas monkeyflower
Habit Perennials, rhizomatous or stoloniferous, mat-forming, rhizomes or stolons flagelliform. Annuals, fibrous-rooted, rooting at proximal nodes, sometimes forming matlike colonies.
Stems

erect to ascending, usually simple, 2–10(–20) cm, villous, internodes shortened.

decumbent to decumbent-ascending basally, becoming fully erect at least in inflorescence, simple, sometimes few-branched from proximal nodes, usually distinctly fistulose, 10–30 cm, glabrous.
Leaves

all basal or near basal, often rosulate;

petiole 0 mm;

blade palmately 3-veined, oblanceolate to elliptic-obovate, 7–40 × 4–12 mm, base cuneate to attenuate, margins entire, distally denticulate to dentate, or sharply serrate-dentate, apex acute to obtuse, abaxial surface glabrous, adaxial glabrous or glabrate to sparsely to densely long-villous, eglandular.

basal and cauline, basal sometimes deciduous by flowering;

petiole: basal and proximals to mid cauline 10–70 mm, distals 0 mm;

blade palmately veined, ovate to broadly ovate or elliptic-ovate, becoming subreniform distally, (5–)15–35(–60) mm, distal closely paired, auriculate-subclasping, base truncate to subcordate, margins dentate-serrate to shallowly dentate, teeth 5–11 per side, apex obtuse to rounded, surfaces glabrous.
Flowers

herkogamous, 1.

plesiogamous, (6–)8–18(–24), often produced from all nodes, loosely to densely racemose, chasmogamous.
Styles

glabrous.

glabrous.
Corollas

yellow to orange-yellow, usually brown-spotted abaxially, base of each abaxial lobe usually with a larger reddish brown spot, bilaterally or nearly radially symmetric, weakly bilabiate or nearly regular, densely hirsute on abaxial side of opening;

tube-throat narrowly campanulate, 15–20 mm, exserted beyond calyx margin;

lobes broadly obovate-oblong, apex rounded- or truncate-notched, throat open, palate densely villous, abaxial ridges prominent.

yellow, red-spotted, bilaterally symmetric, bilabiate;

tube-throat cylindric, 7–11 mm, exserted (1–)2–3(–4) mm beyond calyx margin;

limb slightly expanded.
Fruiting pedicels

30–110(–130) mm, glabrous or sparsely stipitate-glandular near base.

9–20 mm, glabrous, rarely sparsely stipitate-glandular.
Fruiting calyces

tubular-campanulate, weakly or not inflated, 6–8 mm, glabrous.

purple-spotted, sometimes greenish, broadly cylindric-campanulate, inflated, sagittally compressed, 7–11 mm, glabrous, rarely minutely scabrous-hirtellous or sparsely stipitate-glandular, throat not closing, abaxial lobe slightly upcurving 10–45º, spreading 45º, or sometimes deflexed 40º.
Capsules

included, 6–7 mm.

included, 4.5–6 mm.
Anthers

slightly exserted, margins ciliate, glabrous.

included, glabrous.
2n

= 34.

= 60.

Erythranthe primuloides

Erythranthe inamoena
Phenology Flowering Jun–Aug. Flowering Jan–Apr(–Sep).
Habitat Wet meadows, seeps, streamsides. Edge of seeps and creeks, mud or gravel, shallow running water, wet crevices, canyon drainages.
Elevation 600–3400 m. (2000–11200 ft.) 100–2400 m. (300–7900 ft.)
Distribution
from FNA
AZ; CA; ID; MT; NM; NV; OR; UT; WA
[WildflowerSearch map]
from FNA
TX; Mexico (Chihuahua, Coahuila)
Discussion

Flowers in Erythranthe primuloides and E. linearifolia characteristically appear to be scapose, but the scapes are pedicels arising from axils of greatly foreshortened stems. Occasionally in both species the internodes may lengthen somewhat, and the leaves are not so densely clustered at the base of the stems.

In northern Klamath, western Deschutes, and eastern Douglas counties, Oregon, an area within the range of typical populations, Erythranthe primuloides has distinctively large corollas (limbs 10–15 mm wide). Apparent clones of large-flowered and smaller-flowered plants sometimes grow in close proximity or even intermixed, appearing as two different entities.

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

Erythranthe inamoena is distinctive in its completely glabrous herbage, small corollas, flowers in racemes mostly at distal nodes and with reduced bracts, short and open-throated fruiting calyces, erect and fistulose stems, and apparent annual duration (fibrous-rooted but usually rooting at proximal cauline nodes).

Presumably because of its autogamous reproduction, Erythranthe inamoena has been confused with E. cordata, especially in the trans-Pecos region of Texas, where the two are sympatric. In contrast to E. cordata, E. inamoena usually has glabrous pedicels and calyces, flowers often produced from all nodes, smaller calyces [(7–)8–11 mm] that do not close at maturity, and corollas with a shorter tube-throat (7–11 mm).

Some populations in Brewster, Presidio, and Val Verde counties are identified here as Erythranthe inamoena (based on proximal-to-distal distribution of flowers and the short mature calyces with open throat) but have sparsely stipitate-glandular pedicels and calyces.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 389. FNA vol. 17, p. 407.
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. 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
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. 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 primuloides, M. nevadensis, M. pilosellus, M. primuloides var. minimus, M. primuloides var. pilosellus Mimulus inamoenus, M. jamesii var. texensis
Name authority (Bentham) G. L. Nesom & N. S. Fraga: Phytoneuron 2012-39: 35. (2012) (Greene) G. L. Nesom: Phytoneuron 2012-39: 44. (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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