Plant Profile: Distylium racemosum

Names

Isu tree

  • Photo of Distylium racemosum (Distylium racemosums)

Phonetic Spelling:dis-STY-lee-um ray-see-MO-sum

Genus:Distylium

Species:racemosum

Family:Hamamelidaceae

This plant is an evergreen large shrub or small tree belonging to the witch hazel family. In its natural environment, it thrives in evergreen oak forests at elevations exceeding 3,000 feet. To ensure optimal growth, it is best to plant it in a location that is protected from harsh cold winds.

Distylium hybrids are gaining popularity in landscaping because they are evergreen, compact, resistant to diseases and pests, and can withstand heat and drought. Additionally, they require minimal pruning.

The flowers lack petals, featuring a five-part, downy red outer structure adorned with several striking purple stamens.

In its native regions, this species can reach heights of up to 60 feet and is prized for its dense, dark wood, which is highly valued for crafting musical instruments. The wood's ashes are also utilized in porcelain glazing.

When cultivated outside its native range, it generally grows to a height of 10 to 15 feet.

In terms of pests and diseases, this plant is largely free from significant issues.

Distylium racemosum Feature Summary

Distylium racemosum Image Gallery

Tags

#evergreen
#small tree
#cottage garden
#rabbit resistant
#hedges
#large shrub
#deer resistant
#glossy leaves
#screening
#leathery leaves
#late spring flowers
#evergreen shrub
#early summer flowers

Similar Plants

Distylium racemosum Feature Summary

Attributes
Fruit
A two-beaked woody capsule following flowering.
Flowers
Petalless flowers with red calyces and purple stamens form racemes in leaf axils in the late spring to early summer.
Purple/Lavender
Red/Burgundy
Raceme
Insignificant
Spring
Summer
1-3 inches
Leaves
Leathery and glossy dark dreen simple leaves with entire margins. Lighter green below.
Ovate
Oblong
Obovate
1-3 inches
Glossy
Leathery
1-3 inches
Stem
Rigid, short branches.
Whole Plant Traits
Shrub
Tree
Multi-stemmed
Spreading
Cultural Conditions
Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Acid (<6.0)
Alkaline (>8.0)
Neutral (6.0-8.0)
Good Drainage
Moist
3 feet-6 feet
6-feet-12 feet
Coastal
Piedmont
7a
7b
8b
8a
9a
9b
10a
10b
Clay
Loam (Silt)
Sand
Landscape
Cottage Garden
Hedge
Screen/Privacy

Distylium racemosum Attributes

Distylium racemosum: Country Or Region Of Origin

China, Japan

Distylium racemosum: Life Cycle

Annual
Biennial
Bulb
Perennial
Woody

Distylium racemosum: Recommended Propagation Strategy

Division
Grafting
Layering
Leaf Cutting
Root Cutting
Seed
Stem Cutting

Distylium racemosum: 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

Distylium racemosum Fruit

Distylium racemosum: Fruit Description

A two-beaked woody capsule following flowering.

Distylium racemosum: Fruit Type

Achene
Aggregate
Berry
Capsule
Caryopsis
Drupe
Follicle
Legume
Nut
Pome
Samara
Schizocarp
Siliqua

Distylium racemosum: Display/Harvest Time

Fall
Spring
Summer
Winter

Distylium racemosum Flowers

Distylium racemosum: Flower Description

Petalless flowers with red calyces and purple stamens form racemes in leaf axils in the late spring to early summer.

Distylium racemosum: Flower Color

filter_vintage
Purple/Lavender
filter_vintage
Red/Burgundy

Distylium racemosum: Flower Inflorescence

Catkin
Corymb
Cyme
Head
Insignificant
Panicle
Raceme
Solitary
Spadix
Spike
Umbel

Distylium racemosum: Flower Bloom Time

Winter
Spring
Summer
Fall

Distylium racemosum: Flower Size

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

Distylium racemosum Leaves

Distylium racemosum: Leaf Description

Leathery and glossy dark dreen simple leaves with entire margins. Lighter green below.

Distylium racemosum: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Distylium racemosum: Leaf Color

spa
Green

Distylium racemosum: Leaf Type

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

Distylium racemosum: Leaf Arrangement

Alternate
Opposite
Other/more complex
Rosulate
Whorled

Distylium racemosum: 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

Distylium racemosum: Leaf Margin

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

Distylium racemosum: Hairs Present

No
Yes

Distylium racemosum: Leaf Length

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

Distylium racemosum: Leaf Feel

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

Distylium racemosum: Leaf Width

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

Distylium racemosum Stem

Distylium racemosum: Stem Description

Rigid, short branches.

Distylium racemosum: Stem Is Aromatic

No
Yes

Distylium racemosum Whole Plant Traits

Distylium racemosum: 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

Distylium racemosum: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Distylium racemosum: 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

Distylium racemosum: Growth Rate

Slow
Medium
Rapid

Distylium racemosum: Maintenance

Low
Medium
High

Distylium racemosum Cultural Conditions

Distylium racemosum: 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)

Distylium racemosum: Soil pH

Acid (<6.0)
Alkaline (>8.0)
Neutral (6.0-8.0)

Distylium racemosum: Soil Drainage

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

Distylium racemosum: 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

Distylium racemosum: NC Region

Coastal
Mountains
Piedmont

Distylium racemosum: USDA Plant Hardiness Zone

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

Distylium racemosum: Soil Texture

Clay
High Organic Matter
Loam (Silt)
Sand
Shallow Rocky

Distylium racemosum Landscape

Distylium racemosum: 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

Distylium racemosum: 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