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Erythranthe grandis

Erythranthe grandis (Greene) G. L. Nesom

Magnificent Monkeyflower, Magnificent Seep Monkeyflower, Large Monkeyflower

Phrymaceae (Lopseed Family)

Synonym(s): Mimulus grandis, Mimulus guttatus var. grandis, Mimulus langsdorffii var. grandis, Mimulus procerus

USDA Symbol: ERGR24

USDA Native Status: L48 (N)

"Perennials, rhizomatous, sometimes rooting at proximal nodes. Stems erect, sometimes decumbent basally, branched, often fistulose, (25-)50-120(-160) cm, densely hirsutulous to softly hirtellous-puberulent to pilose-hirsutulous, hairs usually crinkly, and eglandular or with a mixture of hirtellous-puberulent and stipitate-glandular hairs, sometimes more or less stipitate-glandular or glandular-villous without hirtellous-puberulent hairs." (Webref: 38).

"The densely, evenly puberulent vestiture of pedicels, calyces, and distal stems usually is diagnostic, especially in combination with the large flowers (corollas and mature calyces) and tall stature. Plants from scattered collections are much shorter than normal but have large corollas and characteristic vestiture.

Erythranthe grandis characteristically occurs in coastal localities from southern California to northern Oregon but also is found in inland localities and habitats near the coast but well away from salt spray." (Webref: 38).

From the Image Gallery

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Plant Characteristics

Duration: Perennial
Habit: Herb
Leaf Shape: Elliptic , Ovate
Leaf Margin: Crenate , Dentate
Leaf Base: Cuneate , Truncate
Size Notes: Usually from 20 to 48 inches, but may reach 60 inches, or more, in height.
Leaf: "Leaves basal and cauline, basal usually not persistent, bracteate in inflorescence; petiole 10-80 mm, gradually reduced distally; blade subpinnately, sometimes palmately, 5-7-veined, ovate to broadly elliptic, 25-60 x 20-40(-60) mm, usually 1-2 times longer than wide, base truncate or truncate-cuneate to subcordate, margins crenulate to dentate, proximally sometimes sublyrate, apex rounded to obtuse, surfaces of distals densely hirsutulous to softly hirtellous-puberulent to pilose-hirsutulous, hairs usually crinkly, and eglandular or with a mixture of hirtellous-puberulent and stipitate-glandular hairs, sometimes more or less stipitate-glandular or glandular-villous without hirtellous-puberulent hairs." (Webref: 38).
Flower: "Flowers herkogamous, 8-26, mostly from distal nodes, usually in bracteate racemes. Fruiting pedicels 10-35 mm, densely hirsutulous to softly hirtellous-puberulent to pilose-hirsutulous, hairs usually crinkly, and eglandular or with a mixture of hirtellous-puberulent and stipitate-glandular hairs, sometimes more or less stipitate-glandular or glandular-villous without hirtellous-puberulent hairs. Fruiting calyces straight-erect or nodding 45-100 degrees, ovate-campanulate, inflated, sagittally compressed, 15-22(-25) mm, densely hirsutulous to softly hirtellous-puberulent to pilose-hirsutulous, hairs usually crinkly, and eglandular or with a mixture of hirtellous-puberulent and stipitate-glandular hairs, sometimes more or less stipitate-glandular or glandular-villous without hirtellous-puberulent hairs, throat closing. Corollas yellow, red-dotted within, bilaterally symmetric, bilabiate; tube-throat broadly funnelform, (14-)16-24 mm, exserted (8-)10-15 mm beyond calyx margin; limb broadly expanded. Styles hirtellous. Anthers included, glabrous." (Webref: 38).
Fruit: "Capsules included, 8-12 mm." (Webref: 38).

Bloom Information

Bloom Color: Red , Yellow
Bloom Time: Apr , May , Jun , Jul , Aug , Sep
Bloom Notes: "Phenology: Flowering (Apr-)May-Jul(-Sep)."� (Webref: 38).

Distribution

USA: CA , OR
Native Distribution: Coastal California and Oregon.
Native Habitat: "Habitat: Beaches, dunes, coastal bluffs, wet cliff faces, mud flats and seeps, marshes, drainage ditches, creeks, rarely in coastal sage scrub. Elevation: 0-200(-800) m." (Webref: 38).

Growing Conditions

Soil Moisture: Moist , Wet
Drought Tolerance: Low
Soil Description: Moist soils.

Benefit

Conspicuous Flowers: yes

Find Seed or Plants

View propagation protocol from Native Plants Network.

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Santa Barbara Botanic Garden - Santa Barbara, CA

Web Reference

Webref 30 - Calflora (2018) Calflora
Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Erythranthe grandis in USDA Plants
FNA: Find Erythranthe grandis in the Flora of North America (if available)
Google: Search Google for Erythranthe grandis

Metadata

Record Modified: 2026-05-19
Research By: Joseph A. Marcus

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