• Photo of Amsonia hubrichtii (Amsonia hubrichtiis)

Plant Profile: Amsonia hubrichtii

Taxonomy: Amsonia hubrichtii

Names

Arkansas Amsonia, Blue Star, Hubricht's Amsonia, Threadleaf Blue Star

  • Photo of Amsonia hubrichtii (Amsonia hubrichtiis)

Phonetic Spelling:am-SO-nee-uh hew-BRIK-tee-eye

Genus:Amsonia

Species:hubrichtii

Family:Apocynaceae

This hardy plant is a rare herbaceous perennial belonging to the Apocynaceae family, native to the Ouachita Mountains in central Arkansas. It thrives in average, well-drained soil and prefers full sun to partial shade. Although it grows slowly, taking one to two years to reveal its full beauty, it develops upright clumps adorned with feathery green leaves, making it a stunning backdrop for shorter annuals and perennials.

After the flowering period, slender, elongated seed pods appear. From afar, this plant can be mistaken for a lily.

In terms of pests and diseases, it faces no significant issues. However, excessive shade can cause the plants to become floppy, so it’s advisable to trim them back after flowering. Care should be taken during this process, as the milky sap can irritate the skin.

Amsonia hubrichtii Feature Summary

Amsonia hubrichtii Image Gallery

Tags

#showy flowers
#fall color
#rain garden
#low maintenance
#fall interest
#cottage garden
#rabbit resistant
#cpp
#herbaceous perennial
#rock gardens
#butterfly friendly
#HS302

Similar Plants

Amsonia hubrichtii Feature Summary

Attributes
Arkansas to Oklahoma
South Central US
​​​​​​​  Flowers attract butterflies.  Is deer resistant.
Perennial
Seed
Stem Cutting
Division
Attracts Pollinators
Attractive Flowers
Flowers
The flowers last longer when grown providing some afternoon shade.
White
Blue
4-5 petals/rays
< 1 inch
Leaves
The soft, needle-like leaves become a beautiful golden fall color when grown in full sun.
Green
Gold/Yellow
Needles
Stem
Too much shade will cause the stems to open up and flop. Cut the stems back to 6" after flowering. Stems may grow up to 3'.
Whole Plant Traits
Cultural Conditions
Full sun (6 or more hours of direct sunlight a day)
Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Good Drainage
Moist
Occasionally Wet
Coastal
Mountains
Piedmont
Clay
Loam (Silt)
Sand
Landscape
Rock Garden
Pollinator Garden
Rain Garden
Cottage Garden
Native Garden
Border
Mass Planting
Accent
Small groups
Specimen
Patio
Walkways
Woodland
Naturalized Area
Slope/Bank
Coastal
Butterflies

Amsonia hubrichtii Attributes

Amsonia hubrichtii: Country Or Region Of Origin

Arkansas to Oklahoma

Amsonia hubrichtii: Distribution

South Central US

Amsonia hubrichtii: Wildlife Value

​​​​​​​  Flowers attract butterflies.  Is deer resistant.

Amsonia hubrichtii: Life Cycle

Annual
Biennial
Bulb
Perennial
Woody

Amsonia hubrichtii: Recommended Propagation Strategy

Division
Grafting
Layering
Leaf Cutting
Root Cutting
Seed
Stem Cutting

Amsonia hubrichtii: Play Value

Attractive Flowers
Attracts Pollinators
Buffer
Colorful
Defines Paths
Easy to Grow
Edible fruit
Fragrance
Pieces Used in Games
Screening
Shade
Sound
Textural
Wildlife Cover/Habitat
Wildlife Food Source
Wildlife Larval Host
Wildlife Nesting
Wind Break
Wind Shimmer

Amsonia hubrichtii Flowers

Amsonia hubrichtii: Flower Description

The flowers last longer when grown providing some afternoon shade.

Amsonia hubrichtii: Flower Color

filter_vintage
Blue
filter_vintage
White

Amsonia hubrichtii: Flower Value To Gardener

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

Amsonia hubrichtii: Flower Bloom Time

Winter
Spring
Summer
Fall

Amsonia hubrichtii: 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

Amsonia hubrichtii: Flower Shape

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

Amsonia hubrichtii: Flower Size

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

Amsonia hubrichtii Leaves

Amsonia hubrichtii: Leaf Description

The soft, needle-like leaves become a beautiful golden fall color when grown in full sun.

Amsonia hubrichtii: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Amsonia hubrichtii: Leaf Color

spa
Gold/Yellow
spa
Green

Amsonia hubrichtii: Deciduous Leaf Fall Color

spa
Gold/Yellow

Amsonia hubrichtii: Leaf Type

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

Amsonia hubrichtii: Leaf Arrangement

Alternate
Opposite
Other/more complex
Rosulate
Whorled

Amsonia hubrichtii: Leaf Shape

Acicular
Auriculate
Cordate
Cuneate
Deltoid
Elliptical
Filiform
Lanceolate
Linear
Oblanceolate
Oblong
Obovate
Obtuse
Orbicular
Ovate
Palmasect
Palmatifid
Peltate
Pinnatifid
Pinnatisect
Reniform
Rhomboidal
Spatulate
Subcordate
Subulate

Amsonia hubrichtii: Leaf Margin

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

Amsonia hubrichtii: Hairs Present

No
Yes

Amsonia hubrichtii: Leaf Feel

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

Amsonia hubrichtii: Leaf Value To Gardener

Edible
Fragrant
Good Cut
Good Dried
Long-lasting
Showy

Amsonia hubrichtii Stem

Amsonia hubrichtii: Stem Description

Too much shade will cause the stems to open up and flop. Cut the stems back to 6" after flowering. Stems may grow up to 3'.

Amsonia hubrichtii: Stem Is Aromatic

No
Yes

Amsonia hubrichtii Whole Plant Traits

Amsonia hubrichtii: 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

Amsonia hubrichtii: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Amsonia hubrichtii: 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

Amsonia hubrichtii: Growth Rate

Slow
Medium
Rapid

Amsonia hubrichtii: Maintenance

Low
Medium
High

Amsonia hubrichtii: Texture

Fine
Medium
Coarse

Amsonia hubrichtii Cultural Conditions

Amsonia hubrichtii: 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)

Amsonia hubrichtii: Soil Drainage

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

Amsonia hubrichtii: 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

Amsonia hubrichtii: NC Region

Coastal
Mountains
Piedmont

Amsonia hubrichtii: USDA Plant Hardiness Zone

thermostat
5a
thermostat
5b
thermostat
6a
thermostat
6b
thermostat
7a
thermostat
7b
thermostat
8a
thermostat
8b

Amsonia hubrichtii: Soil Texture

Clay
High Organic Matter
Loam (Silt)
Sand
Shallow Rocky

Amsonia hubrichtii Landscape

Amsonia hubrichtii: 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

Amsonia hubrichtii: 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

Amsonia hubrichtii: 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

Amsonia hubrichtii: Landscape Location

Coastal
Container
Hanging Baskets
Houseplants
Lawn
Meadow
Naturalized Area
Near Septic
Patio
Pond
Pool/Hardscape
Recreational Play Area
Riparian
Rock Wall
Slope/Bank
Small Space
Vertical Spaces
Walkways
Woodland

Amsonia hubrichtii: Attracts

Bats
Bees
Butterflies
Frogs
Hummingbirds
Moths
Pollinators
Predatory Insects
Reptiles
Small Mammals
Songbirds
Specialized Bees