Flora of North America species comparison

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Erythranthe rubella

Erythranthe veronicifolia

little redstem monkeyflower, red stem himulus, redstem monkeyflower, redstem or little redstem monkeyflower

veronica-leaf monkey-flower
Habit Annuals, taprooted. Plants perennial from slender rhizomes.
Stems

erect, simple, sometimes branched from basal nodes, 3–32 cm, minutely puberulent.

erect, 10–30 cm tall, glabrous proximally, becoming sparsely minutely hirtellous distally.
Leaves

cauline, basal not persistent;

petiole 0 mm;

blade palmately 3-veined (in broader ones), linear to elliptic, 5–22(–30) × 1–5 mm, base narrowed, margins entire, sometimes toothed, apex acute to obtuse, surfaces minutely puberulent.

basal very small, largest at midstem, blades elliptic-ovate, 10–30(–45) mm long, base attenuate to a petiole or petiolar region 5–15 mm (proximal leaves) to 0–3(–5) mm (mid and distal leaves) long, margins shallowly serrate to crenate with 5–8 teeth per side, both surfaces glabrous.
Flowers

herkogamous, sometimes plesiogamous, 1–106, from distal or medial to distal nodes.

1–3(–7) from distal nodes.
Styles

glabrous.

Corollas

yellow and abaxial limb and throat red dotted or pink to purple and throat yellow, bilaterally symmetric, weakly bilabiate;

tube-throat cylindric, 4–10 mm, exserted beyond calyx margin;

limb expanded 3–5 mm, lobes entire or weakly notched, abaxial limb glabrous.

yellow to chrome yellow, without red spots, tube-throat 15–25 mm long, 8–12 mm wide (pressed), exserted 15–25 mm beyond the calyx margin, limb expanded 18-25 mm (pressed).
Calyces

10–15 mm long, densely minutely hirtellous, rarely purple-spotted (variable within populations), lobes obtuse.
Fruiting pedicels

2–18 mm.

20–40 mm.
Fruiting calyces

becoming red-angled or red, campanulate to nearly cylindric, 4–9 mm, margins distinctly toothed or lobed, glabrous or minutely puberulent, ribs thickened, lobes pronounced, erect, margins ciliate.

Capsules

included, 3–8 mm.

Anthers

included, glabrous.

Erythranthe rubella

Erythranthe veronicifolia
Phenology Flowering Apr–Jun. Flowering (Jun–)Jul–early Sep.
Habitat Open slopes and washes. Boggy alpine meadows, around springs and rivulets, lake sides and along rocky streams.
Elevation 300–3000 m. [1000–9800 ft.] 3000–5700 ft.
Distribution
from FNA
AZ; CA; CO; NM; NV; TX; UT; WY; Mexico (Baja California, Sonora)
[WildflowerSearch map]
from FNA
WA; BC
Discussion

Erythranthe veronicifolia is recognized by its rhizomatous habit, erect, mostly unbranched stems minutely hirtellous distally, glabrous proximally, relatively long internodes, ovate-lanceolate leaves with shallowly serrate-crenate margins and attenuate base, and few flowers with large corollas. Greene (1909) noted that the corollas were "perhaps the largest in the genus." Plants of the species are remarkably constant in morphology.

Erythranthe veronicifolia has been commonly collected in the Mt. Angeles area of the Olympic Mountains — typical E. decora occurs there sympatrically (e.g., Mink Lake above Sol Duc Hot Springs). Typical E. caespitosa also occurs on Mt. Angeles — some plants may resemble small individuals of E. veronicifolia (with short stems, small leaves), but E. caespitosa has mostly procumbent stems, smaller leaves with fewer teeth, glabrous calyces, and smaller corollas.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 384. Treatment authors: Guy L. Nesom, Naomi S. Fraga.
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. 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. veronicifolia
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. tilingii, E. trinitiensis, E. unimaculata, E. utahensis, E. verbenacea, E. washingtonensis, E. willisii
Synonyms Mimulus rubellus, M. gratioloides
Name authority (A. Gray) N. S. Fraga: Phytoneuron 2012-39: 35. (2012) (Greene) G. L. Nesom: Phytoneuron 2019-52: 1. (2019)
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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