Flora of North America species comparison

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Erythranthe latidens

Erythranthe hallii

broad-tooth monkeyflower

Hall's monkeyflower
Habit Annuals, fibrous-rooted or filiform-taprooted. Annuals, fibrous-rooted, sometimes apparently rooting at proximal nodes if stems proximally decumbent.
Stems

ascending to ascending-erect, geniculate at nodes, usually many-branched from base, 3–10(–25) cm, short stipitate-glandular or sessile-glandular, hairs 0.1–0.3 mm, gland-tipped.

erect, simple, 4-angled, 2–8 cm, slender, glabrous.
Leaves

basal and cauline, largest at base or near mid stem, sometimes unreduced in size up to distalmost nodes;

petiole 0 mm;

cauline blade palmately 3(–5)-veined, ovate to ovate-lanceolate, 8–26(–35) mm, base abruptly cuneate to rounded, sometimes subauriculate, margins entire or barely mucronulate to shallowly dentate-mucronulate, teeth or mucronulae 1–3 per side, apex acute to rounded, surfaces short stipitate-glandular or sessile-glandular, hairs 0.1–0.3 mm, gland-tipped.

basal and cauline or basal deciduous, largest at mid stem or above, cauline relatively few on long internodes;

petiole: basal and proximals to midcauline 1–4 mm, distals 0 mm;

blade palmately 3-veined, ovate to ovate-lanceolate, 5–11 × 3–9 mm, base truncate to cuneate, margins very shallowly dentate or denticulate, apex acute to obtuse, surfaces glabrous or distals and bracteals sparsely villous, hairs vitreous, flattened, eglandular, multicellular.
Flowers

plesiogamous, (1–)3–12, from medial to distal nodes.

plesiogamous, (1–)4–10, sometimes from all nodes, usually beginning about mid stem, cleistogamous.
Styles

glabrous.

glabrous.
Corollas

white to pinkish or flesh colored, rarely yellowish, throat and abaxial lobes red-spotted, nearly radially symmetric;

tube-throat cylindric, 5–6(–8) mm, exserted beyond calyx margin;

limb barely widened, lobes broadly obovate, apex rounded.

yellow, usually red-dotted, bilaterally or nearly radially symmetric, bilabiate or nearly regular;

tube-throat narrowly cylindric, 4–6 mm, exserted 0.5–1 mm beyond calyx margin;

limb barely expanded.
Fruiting pedicels

straight, 11–28 mm, short stipitate-glandular or sessile-glandular, hairs 0.1–0.3 mm, gland-tipped.

usually deflexed 90º at calyx, 6–14 mm, longer than subtending leaves.
Fruiting calyces

purplish, prominently 5-angled, tubular-campanulate or ovoid-ellipsoid, strongly inflated, 8–12 mm, margins distinctly toothed or lobed, short stipitate-glandular or sessile-glandular, hairs 0.1–0.3 mm, gland-tipped, lobes pronounced, erect.

sometimes red-dotted, broadly elliptic-ovoid, inflated, sagittally compressed, (5–)7–10 mm, glabrous, throat closing, adaxial lobe not distinctly longer than abaxial, not falcate.
Capsules

included, 6–7 mm.

included, 4–6 mm.
Anthers

included, glabrous.

included, glabrous.
2n

= 32.

Erythranthe latidens

Erythranthe hallii
Phenology Flowering Apr–Jun. Flowering May–Aug.
Habitat Drained flats or slopes subject to vernal inundation, depressions in open fields, bare clay soils, vacant lots, roadsides. Ledges, seeps, along streams, wet meadows.
Elevation 10–800 m. (0–2600 ft.) 1900–3200 m. (6200–10500 ft.)
Distribution
from FNA
CA; OR; Mexico (Baja California)
[WildflowerSearch map]
from FNA
CO
Discussion

The distinction between Erythranthe latidens and E. inflatula sometimes seems arbitrary, perhaps because of gene exchange where they are sympatric in northwestern California. Erythranthe latidens in Oregon is known only from southern Harney County.

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

Erythranthe hallii is known from Boulder, Clear Creek, Fremont, Grand, Jefferson, Larimer, Routt, and Saguache counties. The Colorado population system is morphologically and geographically coherent.

Erythranthe hallii is similar to E. arvensis; both have four-angled stems, autogamous reproduction, a tendency to root at basal nodes and distally, and both have bracteal leaves villous with vitreous, flattened, eglandular, multicellular hairs, although this vestiture is barely developed and often absent in E. hallii. The only reported chromosome number from the Colorado plants (2n = 32) also appears to be distinct among possible relatives of E. hallii.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 400. FNA vol. 17, p. 423.
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. 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
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. 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 inconspicuus var. latidens, M. latidens Mimulus hallii, M. guttatus var. hallii
Name authority (A. Gray) G. L. Nesom: Phytoneuron 2012-39: 38. (2012) (Greene) G. L. Nesom: Phytoneuron 2012-39: 43. (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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