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Perennial

Scarlet Monkeyflower

Erythranthe cardinalis (syn. Mimulus cardinalis)

Cardinal Monkey FlowerScarlet Monkey FlowerCrimson Monkeyflower

Scarlet Monkeyflower is a spectacular wetland perennial with brilliant red-orange tubular flowers designed for hummingbird pollination. Its long blooming season and moisture-loving nature make it perfect for water gardens and riparian areas.

Plant Family

Phrymaceae (Lopseed family, formerly Scrophulariaceae)

Blooming

Late spring through fall (May-October), nearly continuous blooming

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Scarlet Monkeyflower with brilliant red tubular blooms
Scarlet Monkeyflower with brilliant red tubular blooms

Symbolism & Meanings

Key Meanings

Joy
Playfulness
Attraction
Vitality
Hummingbird hospitality

Perfect For

Hummingbird garden celebrationsWater garden dedicationsRiparian restoration eventsWildlife habitat acknowledgments

Color Meanings

Scarlet:Passion, energy, and vibrant life
Orange-red:Warmth, enthusiasm, and joy

Similar flowers: sky flowers and sesbanias also share similar meanings.

Cultural Significance

The genus name Erythranthe comes from Greek erythros (red) and anthos (flower), perfectly describing this brilliant red species. Previously classified as Mimulus (from Latin mimus, meaning mimic or actor), referring to the flower's resemblance to a monkey's grinning face. This was one of the first western wildflowers introduced to European gardens in the 1800s, creating huge demand from collectors. The flower structure is specifically adapted for hummingbird pollination, with reflexed petals exposing the throat and positioning pollen to transfer to the hummingbird's forehead. Scarlet Monkeyflower serves as a model system for studying pollinator-based reproductive isolation in scientific research.
Related cultural flowers:Sunflower, Rose
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Botanical Information

Physical Characteristics

Flower Size: 1.5-2 inches long (4-5 cm), showy tubular flowers
Plant Size: 1-3 feet tall (30-90 cm) and 2-4 feet wide, spreading habit
Flower Shape: Two-lipped tubular with strongly reflexed lower lip, protruding stamens

Natural Habitat

Native to: Western United States (southwestern Oregon, California, Nevada, Utah, Arizona, New Mexico) and Baja California
Habitat: Stream banks, seeps, springs, pond margins, wet meadows, and under water-dripping cliffs
Climate: Mediterranean, Warm temperate, Subtropical

Growing Guide

Sunlight

Full sun to partial shade; prefers some afternoon shade in hot climates

Water

Requires consistently moist to wet soil; tolerates seasonal flooding and standing water; critical for establishment and continuous flowering

Soil

Moist, Wet, Sandy, Loamy, Rich, Tolerates poor drainage

Expert Growing Tips

1

Plant in consistently moist to wet locations

2

Requires regular watering if not planted near water

3

Older stems become woody and floppy; trim back periodically for tidiness

4

Benefits from partial shade in hot, inland areas

5

Self-seeds readily in moist conditions

6

Evergreen in mild climates, dies back in cold winters

7

Spreads by creeping stems that root at nodes

8

No serious pest or disease problems

Uses & Benefits

Ornamental Uses

  • Water gardens and bog gardens
  • Pond and stream edges
  • Rain gardens
  • Hummingbird gardens
  • Wet meadows and riparian areas
  • Container water gardens

Frequently Asked Questions about the Scarlet Monkeyflower

Why is it called Monkey Flower?

It is called Monkey Flower because the two-lipped tubular blooms resemble a monkey's grinning face. The genus was formerly named Mimulus, from Latin "mimus" meaning mimic or actor, referring to this fanciful resemblance.

Do hummingbirds prefer Scarlet Monkeyflower?

Yes, Scarlet Monkeyflower is specifically adapted for hummingbird pollination. The red tubular flowers with reflexed petals and abundant nectar are perfectly designed for hummingbird feeding, and pollen transfers to their foreheads.

Can Scarlet Monkeyflower grow without constant water?

Scarlet Monkeyflower requires consistently moist to wet soil and does not tolerate drying out. It must be planted in naturally wet areas or provided with regular, generous watering to thrive and bloom continuously.

Is Scarlet Monkeyflower related to Lewis's Monkeyflower?

Yes, Scarlet Monkeyflower (Erythranthe cardinalis) and Lewis's Monkeyflower (Mimulus lewisii) are closely related species used as models to study pollinator-based reproductive isolation. Scarlet is pollinated by hummingbirds while Lewis's is pollinated by bees.

Available Colors

Scarlet
Red
Orange-red
Yellow (rare variant)

Quick Facts

Type:perennial
Family:Phrymaceae (Lopseed family, formerly Scrophulariaceae)
Native to:Western United States (southwestern Oregon, California, Nevada, Utah, Arizona, New Mexico) and Baja California
Blooms:Late spring through fall (May-October), nearly continuous blooming

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