Flora of North America species comparison

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Erythranthe latidens

Erythranthe linearifolia

broad-tooth monkeyflower

primrose monkeyflower, threadleaf primrose monkeyflower
Habit Annuals, fibrous-rooted or filiform-taprooted. Perennials, rhizomatous, densely cespitose, forming large patches and turfs 0.3–1 m diam.
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 to ascending, simple, 2–10 cm, sparsely hirsute and stipitate-glandular, internodes shortened.
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 or near basal, sometimes proximal cauline, subrosulate;

petiole 0 mm;

blade 1-veined or palmately 3-veined, linear to narrowly oblanceolate, 15–50 × 1.5–5 mm, base long-cuneate, often subclasping, margins entire, dentate-serrate, or distally dentate, apex acute, surfaces glabrous or adaxial sparsely short-pilose, eglandular.
Flowers

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

herkogamous, 1.
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, red-spotted or -striped, bilaterally symmetric, weakly bilabiate, loosely hirsute on abaxial side of opening;

tube-throat narrowly campanulate, 18–22 mm, exserted beyond calyx margin;

lobes broadly obovate-oblong, apex rounded- or truncate-notched, throat open.
Fruiting pedicels

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

(40–)65–85(–120) mm, glabrous or sparsely stipitate-glandular near base.
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.

winged- or plicate-angled, tubular-campanulate, weakly or not inflated, 9–10(–12) mm, glabrous.
Capsules

included, 6–7 mm.

included, 6–7 mm.
Anthers

included, glabrous.

included or slightly exserted, margins ciliate, glabrous.

Erythranthe latidens

Erythranthe linearifolia
Phenology Flowering Apr–Jun. Flowering Jul–Sep.
Habitat Drained flats or slopes subject to vernal inundation, depressions in open fields, bare clay soils, vacant lots, roadsides. Wet banks, Darlingtonia seeps and bogs, seepages in serpentine talus.
Elevation 10–800 m. (0–2600 ft.) 600–2800 m. (2000–9200 ft.)
Distribution
from FNA
CA; OR; Mexico (Baja California)
[WildflowerSearch map]
from FNA
CA
[WildflowerSearch map]
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 linearifolia is endemic to serpentine substrates in Shasta, Siskiyou, and Trinity counties; typical E. primuloides occurs in the same area but not on serpentine. Erythranthe linearifolia is distinct from E. primuloides especially in its narrow leaves and cespitose habit. A collection from Tulare County appears to be E. linearifolia (Shevock 10597, CAS), but this appears to be far out of range and the voucher should be reexamined; it probably is better identified as an unusual collection of E. primuloides.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 400. FNA vol. 17, p. 390.
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. hallii, E. hardhamiae, E. hymenophylla, E. inamoena, E. inconspicua, E. inflatula, E. jungermannioides, E. laciniata, E. latidens, E. lewisii, 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 primuloides var. linearifolius, M. linearifolius, M. primuloides subsp. linearifolius
Name authority (A. Gray) G. L. Nesom: Phytoneuron 2012-39: 38. (2012) (A. L. Grant) G. L. Nesom & N. S. Fraga: Phytoneuron 2012-39: 35. (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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