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Butter Cress

Ranunculus (ra-NUN-ku-lus)

Family: Ranunculaceae Non-native Herbaceous (1-3 ft)

Buttercup is a genus of perennial or annual herbs in the buttercup family (Ranunculaceae). The genus of more than 1,700 species is found worldwide, especially in cool, moist habitats. The meaning of the Latin genus name is “little frog,” perhaps bestowed because many species are found in the same habitats as frogs. These plants do best in full to partial (afternoon) sun. When planting the tuberous species, cover the tuberous roots with 3 inches of soil and space plants 3 to 6 inches apart. Soak the tubers for 1 hour before planting or water well once planted. The leaves are usually alternate and palmately lobed or divided. The foliage tends to die down in the summer. Annual species seem to be winter or early spring annuals, dying down by summer. While the flowers of most species are yellow, some species have white, pink or even orange flowers. The flowers give way to a head of small, dry achenes, which disperse readily. Because of this, some species can be a bit weedy in disturbed areas. Buttercup species are great pollinator plants because they bloom very early, when few other plants are flowering. Consider using them for beds, borders, riparian gardens, rock gardens and fresh cut flowers. Insects, Diseases, and Other Plant Problems: Most species are relatively pest-free. Greenhouse-grown plants are plagued by the usual greenhouse pests, whitefly, aphids, spider mites and mealybugs.

Source: NC State Extension Gardener Plant Toolbox ↗ NC State Extension Gardener Plant Toolbox, 45 attributes.

How it fits the guild

Guild layer 4 - Herbaceous (1-3 ft)
See companions & conflicts ↓

Companions & Conflicts

Curated pairwise relationships between this plant and others in the library — who feeds whom, who competes, who confuses the pests. Green reads as a good pairing, red as one to avoid.

No curated interactions recorded for this species yet.

Also noted by NC State

Related species the NC State Plant Toolbox flags for this plant — look-alikes to tell apart, and plants that play a similar role in a planting. Ones we carry in the library are linked.

Often confused with Chelidonium majus Eranthis cilicica

Full plant profile

Growing Conditions
Plant type
Annual; Ground Cover; Herbaceous Perennial; Poisonous; Weed; Wildflower
Life cycle
Annual; Perennial
Light
Full sun (6 or more hours of direct sunlight a day) | Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Available space
Less than 12 inches
NC region
Coastal; Mountains; Piedmont
Mature size
Height: 0 ft. 2 in. - 2 ft. 0 in. | Width: 0 ft. 3 in. - 0 ft. 6 in.
Growth rate
Medium
Canopy layer
4 - Herbaceous (1-3 ft)
Form & Appearance
Habit / form
Clumping; Creeping; Spreading
Leaf color
Green
Leaf type
Compound (Pinnately , Bipinnately, Palmately)
Leaf arrangement
Alternate
Hairs present
No
Leaf detail
leaves alternate, palmately lobed or divided
Flower color
Gold/Yellow; Green; Orange; Pink; Red/Burgundy; White
Flower value
Good Cut; Showy
Flower form
Solitary
Flower shape
Cup; Saucer
Flower size
1-3 inches
Flower detail
Flower commonly yellow, thimblelike, often shiny. Cultivars in many other colors.
Bloom time
Spring; Summer; Winter
Fruit type
Achene
Fruit detail
Fruit a head of small, dry achenes.
Wildlife & Ecology
Native status
Non-native
Origin
USA, Eurasia, South America, Australia, Africa.
Attracts
Pollinators
Food & Medicine
Fruit type
Achene
Landscape Use
Landscape location
Naturalized Area; Woodland
Landscape theme
Cutting Garden; Pollinator Garden
Garden tags
#summer bulbs #yellow flowers #poisonous #hummingbird friendly #pollinator plant #spring flowering bulbs #problem for cats #problem for dogs #problem for horses #full sun tolerant #partial shade tolerant #perennial #annual #contact dermatitis
Problems & Resistance
Problems
Contact Dermatitis; Poisonous to Humans; Problem for Cats; Problem for Dogs; Problem for Horses; Weedy
Poison severity
Medium
Poison parts
Bark; Flowers; Fruits; Leaves; Roots; Sap/Juice; Seeds; Stems
Poison symptoms
Ingestion causes burning of the mouth, abdominal pain, vomiting, hypersalivation, depression, anorexia, wobbly gait, and bloody diarrhea. Skin redness, burning sensation, and blisters following contact with cell sap.
Toxic principle
Protoanemonin, released from the glycoside ranunculin.
Contact dermatitis
Yes
Toxicity summary
Medium severity poison; parts: Bark; Flowers; Fruits; Leaves; Roots; Sap/Juice; Seeds; Stems; contact dermatitis

Planted at Hunnicutt

Nobody’s planted this one yet.