• Photo of Acanthus spinosus (Acanthus spinosuss)

Plant Profile: Acanthus spinosus

Taxonomy: Acanthus spinosus

Names

Bear's Breeches, Spiny Bear's Breech, Spiny Bear's Breeches

  • Photo of Acanthus spinosus (Acanthus spinosuss)

Phonetic Spelling:ah-KAN-thus spih-NO-sus

Genus:Acanthus

Species:spinosus

Family:Acanthaceae

Spiny Bear’s Breeches is a robust perennial characterized by its large, spiky foliage and striking purple-white blooms, adding vibrant color to shaded areas. The plant's arching leaves served as inspiration for the design of the Greek Corinthian columns.

Thriving in well-drained soil and partial shade, this plant struggles in overly wet conditions. It has a tendency to spread rapidly through seeds and root cuttings, making it quite challenging to remove from garden beds.

In terms of pests and diseases, Spiny Bear’s Breeches generally remains resilient, although it can be susceptible to damage from slugs and snails.

Acanthus spinosus Feature Summary

Acanthus spinosus Image Gallery

Tags

#purple
#white
#perennial
#weedy
#cut flowers
#spreading
#summer flowers
#mid-summer flowers
#partial shade tolerant

Similar Plants

Acanthus spinosus is often confused with:

Acanthus spinosus Feature Summary

Flowers
White snapdragon-like flowers surrounded by spiny pink-mauve-red bracts arranged in rows on showy spikes that are 3-4' tall. Blooms late spring to mid-summer.
Pink
Purple/Lavender
White
Red/Burgundy
Spring
Summer
Bracts
fused petals
Tubular
Irregular
Lipped
1-3 inches
Leaves
Bear's breeches colorful deeply cut leaves make a bold architectural statement with its large (2'-3'), spiny leaves, which served as the pattern for the design on Greek Corinthian columns. They are arching, glossy, thistle-like leaves that emerge from a rosette in the center of the plant.
> 6 inches
Prickly
Glossy
Showy
Long-lasting
> 6 inches
Whole Plant Traits
Cultural Conditions
Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Good Drainage
Coastal
Mountains
Piedmont
7a
7b
8b
8a
9a
9b
10a
10b
Clay
High Organic Matter
Loam (Silt)
Sand
Landscape
Cutting Garden
Border
Accent
Weedy
Spines/Thorns

Acanthus spinosus Attributes

Acanthus spinosus: Country Or Region Of Origin

Europe, Mediterranean

Acanthus spinosus: Particularly Resistant To (Insects/Diseases/Other Problems)

Tolerates damage from rabbits.

Acanthus spinosus: Life Cycle

Annual
Biennial
Bulb
Perennial
Woody

Acanthus spinosus: Recommended Propagation Strategy

Division
Grafting
Layering
Leaf Cutting
Root Cutting
Seed
Stem Cutting

Acanthus spinosus Flowers

Acanthus spinosus: Flower Description

White snapdragon-like flowers surrounded by spiny pink-mauve-red bracts arranged in rows on showy spikes that are 3-4' tall. Blooms late spring to mid-summer.

Acanthus spinosus: Flower Color

filter_vintage
Pink
filter_vintage
Purple/Lavender
filter_vintage
Red/Burgundy
filter_vintage
White

Acanthus spinosus: Flower Inflorescence

Catkin
Corymb
Cyme
Head
Insignificant
Panicle
Raceme
Solitary
Spadix
Spike
Umbel

Acanthus spinosus: Flower Value To Gardener

Edible
Fragrant
Good Cut
Good Dried
Long Bloom Season
Long-lasting
Showy

Acanthus spinosus: Flower Bloom Time

Winter
Spring
Summer
Fall

Acanthus spinosus: Flower Petals

2-3 rays/petals
4-5 petals/rays
6 petals/rays
7 - 20 petals/rays
asymmetrical petals
Bracts
Colored Sepals
fused petals
more than 20 petals/rays
Tepals

Acanthus spinosus: Flower Shape

Bell
Cross
Crown
Cup
Dome
Funnel
Irregular
Lipped
Radial
Saucer
Star
Trumpet
Tubular
Urn
Wheel

Acanthus spinosus: Flower Size

1-3 inches
3-6 inches
< 1 inch
> 6 inches

Acanthus spinosus Leaves

Acanthus spinosus: Leaf Description

Bear's breeches colorful deeply cut leaves make a bold architectural statement with its large (2'-3'), spiny leaves, which served as the pattern for the design on Greek Corinthian columns. They are arching, glossy, thistle-like leaves that emerge from a rosette in the center of the plant.

Acanthus spinosus: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Acanthus spinosus: Leaf Color

spa
Green

Acanthus spinosus: Leaf Type

Compound (Pinnately , Bipinnately, Palmately)
Fronds
Needles
Sheath
Simple

Acanthus spinosus: Leaf Arrangement

Alternate
Opposite
Other/more complex
Rosulate
Whorled

Acanthus spinosus: Leaf Margin

Crenate
Crenulate
Dentate
Denticulate
Doubly Crenate
Doubly Dentate
Doubly Serrate
Entire
Lobed
Serrate
Sinuate
Undulate

Acanthus spinosus: Hairs Present

No
Yes

Acanthus spinosus: Leaf Length

< 1 inch
1-3 inches
3-6 inches
> 6 inches

Acanthus spinosus: Leaf Feel

Fleshy
Glossy
Leathery
Papery
Prickly
Rough
Rubbery
Slippery
Smooth
Soft
Velvety
Waxy

Acanthus spinosus: Leaf Value To Gardener

Edible
Fragrant
Good Cut
Good Dried
Long-lasting
Showy

Acanthus spinosus: Leaf Width

< 1 inch
1-3 inches
3-6 inches
> 6 inches

Acanthus spinosus Whole Plant Traits

Acanthus spinosus: Plant Type

Annual
Bulb
Carnivorous
Edible
Epiphyte
Fern
Ground Cover
Herb
Herbaceous Perennial
Houseplant
Mushroom
Native Plant
Ornamental Grasses and Sedges
Perennial
Poisonous
Rose
Shrub
Succulent
Tree
Turfgrass
Vegetable
Vine
Water Plant
Weed
Wildflower

Acanthus spinosus: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Acanthus spinosus: Habit/Form

Arching
Ascending
Broad
Cascading
Climbing
Clumping
Columnar
Conical
Creeping
Dense
Erect
Horizontal
Irregular
Mounding
Multi-stemmed
Multi-trunked
Open
Oval
Prostrate
Pyramidal
Rounded
Spreading
Vase
Weeping

Acanthus spinosus: Maintenance

Low
Medium
High

Acanthus spinosus: Texture

Fine
Medium
Coarse

Acanthus spinosus: Appendage

Prickles
Spines
Tendrils
Thorns

Acanthus spinosus Cultural Conditions

Acanthus spinosus: Light

Dappled Sunlight (Shade through upper canopy all day)
Deep shade (Less than 2 hours to no direct sunlight)
Full sun (6 or more hours of direct sunlight a day)
Partial Shade (Direct sunlight only part of the day, 2-6 hours)

Acanthus spinosus: Soil Drainage

Frequent Standing Water
Good Drainage
Moist
Occasional Flooding
Occasionally Dry
Occasionally Wet
Very Dry

Acanthus spinosus: Available Space To Plant

12 inches-3 feet
12-24 feet
24-60 feet
3 feet-6 feet
6-feet-12 feet
Less than 12 inches
more than 60 feet

Acanthus spinosus: NC Region

Coastal
Mountains
Piedmont

Acanthus spinosus: USDA Plant Hardiness Zone

thermostat
10a
thermostat
10b
thermostat
7a
thermostat
7b
thermostat
8a
thermostat
8b
thermostat
9a
thermostat
9b

Acanthus spinosus: Soil Texture

Clay
High Organic Matter
Loam (Silt)
Sand
Shallow Rocky

Acanthus spinosus Stem

Acanthus spinosus: Stem Is Aromatic

No
Yes

Acanthus spinosus Landscape

Acanthus spinosus: Landscape Theme

Asian Garden
Butterfly Garden
Children's Garden
Cottage Garden
Cutting Garden
Drought Tolerant Garden
Edible Garden
English Garden
Fairy Garden
Garden for the Blind
Native Garden
Nighttime Garden
Pollinator Garden
Rain Garden
Rock Garden
Shade Garden
Water Garden
Winter Garden

Acanthus spinosus: Design Feature

Accent
Barrier
Border
Flowering Tree
Foundation Planting
Hedge
Mass Planting
Screen/Privacy
Security
Shade Tree
Small groups
Small Tree
Specimen
Street Tree
Understory Tree

Acanthus spinosus: Resistance To Challenges

Black Walnut
Compaction
Deer
Diseases
Drought
Dry Soil
Erosion
Fire
Foot Traffic
Heat
Heavy Shade
Humidity
Insect Pests
Pollution
Poor Soil
Rabbits
Salt
Slugs
Squirrels
Storm damage
Urban Conditions
Voles
Wet Soil
Wind

Acanthus spinosus: Problems

Allelopathic
Contact Dermatitis
Frequent Disease Problems
Frequent Insect Problems
Invasive Species
Malodorous
Messy
Poisonous to Humans
Problem for Cats
Problem for Children
Problem for Dogs
Problem for Horses
Short-lived
Spines/Thorns
Weak Wood
Weedy