FNA: Erythranthe rubella vs. Erythranthe hardhamiae

	Erythranthe rubella	Erythranthe hardhamiae
	little redstem monkeyflower, red stem himulus, redstem monkeyflower, redstem or little redstem monkeyflower	Hardham's monkeyflower, Santa Lucia monkeyflower
Habit	Annuals, taprooted.	Annuals, taprooted.
Stems	erect, simple, sometimes branched from basal nodes, 3–32 cm, minutely puberulent.	erect, simple or branched from basal nodes, (2–)3–13 cm, glabrous or minutely puberulent.
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.	cauline, basal not persistent; petiole 0 mm; blade palmately 3-veined (in broader ones), linear to oblanceolate, 2–12 × 1–5 mm, base attenuate, margins entire, sometimes toothed, apex acute, surfaces glabrous or minutely puberulent.
Flowers	herkogamous, sometimes plesiogamous, 1–106, from distal or medial to distal nodes.	herkogamous, 1–12, from distal or medial to distal nodes.
Styles	glabrous.	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.	pink to purple, abaxial limb with 2 yellow palate ridges, bilaterally symmetric, strongly bilabiate; tube-throat funnelform, 5–10 mm, exserted 2–5 mm beyond calyx margin; limb expanded 7–13 mm, lobes notched, abaxial limb sparsely bearded.
Fruiting pedicels	2–18 mm.	ascending to often spreading horizontally, 10–60 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.	becoming reddish, sometimes red-spotted, campanulate to cylindric, 4–6 mm, margins distinctly toothed or lobed, glabrous or minutely puberulent, ribs weak, lobes pronounced, erect, margins glabrous.
Capsules	included, 3–8 mm.	included, 4–5 mm.
Anthers	included, glabrous.	included or slightly exserted, glabrous.
Stigmas		equal in length to corolla tube or exserted.

	Erythranthe rubella	Erythranthe hardhamiae
Phenology	Flowering Apr–Jun.	Flowering Mar–Apr.
Habitat	Open slopes and washes.	Sandy soils near sandstone outcrops and chaparral.
Elevation	300–3000 m. [1000–9800 ft.]	300–800 m. [1000–2600 ft.]
Distribution	AZ; CA; CO; NM; NV; TX; UT; WY; Mexico (Baja California, Sonora) [WildflowerSearch map]	CA
Discussion		Erythranthe hardhamiae is endemic to the central coast region in Monterey and San Luis Obispo counties. The species was previously included in E. palmeri but can be distinguished by having a wider limb (16–25 mm) than E. palmeri (8–15 mm) and pale pink flowers with a broad yellow palate and orifice. In contrast, E. palmeri has deep pink flowers with two yellow ridges on the palate. (Discussion copyrighted by Flora of North America; reprinted with permission.)
Source	FNA vol. 17, p. 384. Treatment authors: Guy L. Nesom, Naomi S. Fraga.	FNA vol. 17, p. 388. 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. 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, E. veronicifolia
Synonyms	Mimulus rubellus, M. gratioloides
Name authority	(A. Gray) N. S. Fraga: Phytoneuron 2012-39: 35. (2012)	N. S. Fraga: Aliso 30: 64, figs. 23–25. (2012)
Web links	Local floras: CA Local Web sites: CalFlora, CalPhotos WildflowerSearch iNaturalist (observations) LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: CA Local Web sites: CalFlora, CalPhotos WildflowerSearch iNaturalist (observations) LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Erythranthe hardhamiae

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

Hardham's monkeyflower, Santa Lucia monkeyflower

Habit

Annuals, taprooted.

Stems

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

erect, simple or branched from basal nodes, (2–)3–13 cm, glabrous or minutely puberulent.

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.

cauline, basal not persistent;

petiole 0 mm;

blade palmately 3-veined (in broader ones), linear to oblanceolate, 2–12 × 1–5 mm, base attenuate, margins entire, sometimes toothed, apex acute, surfaces glabrous or minutely puberulent.

Flowers

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

herkogamous, 1–12, from distal or medial to 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.

pink to purple, abaxial limb with 2 yellow palate ridges, bilaterally symmetric, strongly bilabiate;

tube-throat funnelform, 5–10 mm, exserted 2–5 mm beyond calyx margin;

limb expanded 7–13 mm, lobes notched, abaxial limb sparsely bearded.

Fruiting pedicels

2–18 mm.

ascending to often spreading horizontally, 10–60 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.

becoming reddish, sometimes red-spotted, campanulate to cylindric, 4–6 mm, margins distinctly toothed or lobed, glabrous or minutely puberulent, ribs weak, lobes pronounced, erect, margins glabrous.

Capsules

included, 3–8 mm.

included, 4–5 mm.

Anthers

included, glabrous.

included or slightly exserted, glabrous.

Stigmas

equal in length to corolla tube or exserted.

Erythranthe hardhamiae

Phenology

Flowering Apr–Jun.

Flowering Mar–Apr.

Habitat

Open slopes and washes.

Sandy soils near sandstone outcrops and chaparral.

Elevation

300–3000 m. [1000–9800 ft.]

300–800 m. [1000–2600 ft.]

Distribution

AZ; CA; CO; NM; NV; TX; UT; WY; Mexico (Baja California, Sonora)

[WildflowerSearch map]

Discussion

Erythranthe hardhamiae is endemic to the central coast region in Monterey and San Luis Obispo counties. The species was previously included in E. palmeri but can be distinguished by having a wider limb (16–25 mm) than E. palmeri (8–15 mm) and pale pink flowers with a broad yellow palate and orifice. In contrast, E. palmeri has deep pink flowers with two yellow ridges on the palate.

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

Source

FNA vol. 17, p. 384. Treatment authors: Guy L. Nesom, Naomi S. Fraga.

FNA vol. 17, p. 388. Treatment authors: Guy L. Nesom, Naomi S. Fraga.

Parent taxa

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. 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, E. veronicifolia

Synonyms

Mimulus rubellus, M. gratioloides

Name authority

(A. Gray) N. S. Fraga: Phytoneuron 2012-39: 35. (2012)

N. S. Fraga: Aliso 30: 64, figs. 23–25. (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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Erythranthe rubella

Erythranthe hardhamiae

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Erythranthe hardhamiae