• Photo of Chasmanthium latifolium (Chasmanthium latifoliums)

Plant Profile: Chasmanthium latifolium

Taxonomy: Chasmanthium latifolium

Names

Indian Wood Oats, Northern Sea Oats, River Oats, Wild Oats, Wood-oat

  • Photo of Chasmanthium latifolium (Chasmanthium latifoliums)

Phonetic Spelling:chas-MAN-thee-um lat-ih-FOH-lee-um

Genus:Chasmanthium

Species:latifolium

Family:Poaceae

River Oats is a native grass that forms clumps and grows upright, featuring unique seed heads that resemble oats. This plant thrives in moist to wet, well-drained soils and can flourish in areas with partial sun to partial shade. It demonstrates a good tolerance for shade and has the potential to spread vigorously through rhizomes and seeds.

In spring, the tall stalks produce drooping seed heads that start off green, transition to tan in summer, and take on a purplish hue in the fall. These seed heads dance gracefully in even the lightest breeze. The bamboo-like leaves can turn a striking yellow-gold in the fall, provided they receive sufficient sunlight.

River Oats is ideal for use in naturalized settings, along stream banks, or at the edges of water gardens. This plant was honored as the 1994 NC Wildflower of the Year, a recognition facilitated by the North Carolina Botanical Garden with support from the Garden Club of North Carolina.

Chasmanthium latifolium Feature Summary

Chasmanthium latifolium Image Gallery

Tags

#resistant
#wildlife plant
#partial sun
#shade tolerant
#salt tolerant
#erosion control
#wet sites
#NC native
#spreading
#deer resistant
#shimmer
#native ornamental grass
#larval host plant
#food source summer
#showy seedheads
#food source fall
#food source herbage
#coastal FAC
#bird friendly
#food source hard mast fruit
#mammals
#butterfly friendly
#butterfly larvae
#Piedmont Mountains FACU
#partial shade tolerant
#pollinator garden
#audubon
#northern pearly-eye butterfly
#NC Wildflower of the Year

Similar Plants

Chasmanthium latifolium Feature Summary

Attributes
Central Canada, Central & E. U.S.A. to NE. Mexico
AL , AR , AZ , DC , DE , FL , GA , IA , IL , IN , KS , KY , LA , MD , MI , MO , MS , NC , NJ , NM , OH , OK , PA , SC , TN , TX , VA , WI , WV
This is a larval host plant for Northern Pearly-Eye (Lethe anthedon) caterpillars. You may see two broods from May-September in the south or one brood from June-August in the north. Highly resistant to deer. Host plant to Northern Pearly Eye and several skipper butterflies. Small mammals and birds are attracted to the seeds.
Perennial
Wildlife Food Source
Shade
Wind Shimmer
Wildlife Cover/Habitat
Wildlife Larval Host
Fruit
Seed heads are green to tan then purplish bronze from July to November.
Caryopsis
Brown/Copper
Gray/Silver
Purple/Lavender
Cream/Tan
Showy
Long-lasting
Flowers
The inflorescence is an open panicle with branches nodding or drooping. It is initially green, turning brown at maturity. The individual spikelets are up to 1-1/2 inches long and over 1/2 inch wide, with typically 6 to 17 florets. Flowers bloom from June to October.
Purple/Lavender
Brown/Copper
Green
Showy
Long-lasting
Good Dried
1-3 inches
Leaves
5-9 inch long and 1-inch wide flat green leaf blades are upright to slightly arching, turn a yellow-coppery color in fall and brown in winter.
Brown/Copper
Gold/Yellow
Linear
Lanceolate
> 6 inches
Showy
Long-lasting
< 1 inch
Whole Plant Traits
Native Plant
Ornamental Grasses and Sedges
Erect
Clumping
Coarse
Cultural Conditions
Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Dappled Sunlight (Shade through upper canopy all day)
Moist
Occasionally Wet
Coastal
Mountains
Piedmont
5b
5a
6a
6b
7a
7b
8b
8a
9a
9b
Clay
Loam (Silt)
Sand
Landscape
Butterfly Garden
Pollinator Garden
Winter Garden
Cottage Garden
Native Garden
Shade Garden
Water Garden
Border
Mass Planting
Accent
Drought
Deer
Wet Soil
Salt
Erosion
Black Walnut
Container
Woodland
Naturalized Area
Riparian
Pond
Butterflies
Pollinators
Songbirds
Small Mammals

Chasmanthium latifolium Attributes

Chasmanthium latifolium: Country Or Region Of Origin

Central Canada, Central & E. U.S.A. to NE. Mexico

Chasmanthium latifolium: Distribution

AL , AR , AZ , DC , DE , FL , GA , IA , IL , IN , KS , KY , LA , MD , MI , MO , MS , NC , NJ , NM , OH , OK , PA , SC , TN , TX , VA , WI , WV

Chasmanthium latifolium: Wildlife Value

This is a larval host plant for Northern Pearly-Eye (Lethe anthedon) caterpillars. You may see two broods from May-September in the south or one brood from June-August in the north. Highly resistant to deer. Host plant to Northern Pearly Eye and several skipper butterflies. Small mammals and birds are attracted to the seeds.

Chasmanthium latifolium: Life Cycle

Annual
Biennial
Bulb
Perennial
Woody

Chasmanthium latifolium: Recommended Propagation Strategy

Division
Grafting
Layering
Leaf Cutting
Root Cutting
Seed
Stem Cutting

Chasmanthium latifolium: 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

Chasmanthium latifolium Fruit

Chasmanthium latifolium: Fruit Description

Seed heads are green to tan then purplish bronze from July to November.

Chasmanthium latifolium: Fruit Type

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

Chasmanthium latifolium: Fruit Color

grass
Brown/Copper
grass
Cream/Tan
grass
Gray/Silver
grass
Purple/Lavender

Chasmanthium latifolium: Fruit Value To Gardener

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

Chasmanthium latifolium: Display/Harvest Time

Fall
Spring
Summer
Winter

Chasmanthium latifolium Flowers

Chasmanthium latifolium: Flower Description

The inflorescence is an open panicle with branches nodding or drooping. It is initially green, turning brown at maturity. The individual spikelets are up to 1-1/2 inches long and over 1/2 inch wide, with typically 6 to 17 florets. Flowers bloom from June to October.

Chasmanthium latifolium: Flower Color

filter_vintage
Brown/Copper
filter_vintage
Green
filter_vintage
Purple/Lavender

Chasmanthium latifolium: Flower Inflorescence

Catkin
Corymb
Cyme
Head
Insignificant
Panicle
Raceme
Solitary
Spadix
Spike
Umbel

Chasmanthium latifolium: Flower Value To Gardener

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

Chasmanthium latifolium: Flower Bloom Time

Winter
Spring
Summer
Fall

Chasmanthium latifolium: Flower Size

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

Chasmanthium latifolium Leaves

Chasmanthium latifolium: Leaf Description

5-9 inch long and 1-inch wide flat green leaf blades are upright to slightly arching, turn a yellow-coppery color in fall and brown in winter.

Chasmanthium latifolium: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Chasmanthium latifolium: Leaf Color

spa
Green

Chasmanthium latifolium: Deciduous Leaf Fall Color

spa
Brown/Copper
spa
Gold/Yellow

Chasmanthium latifolium: Leaf Type

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

Chasmanthium latifolium: Leaf Arrangement

Alternate
Opposite
Other/more complex
Rosulate
Whorled

Chasmanthium latifolium: 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

Chasmanthium latifolium: Leaf Margin

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

Chasmanthium latifolium: Hairs Present

No
Yes

Chasmanthium latifolium: Leaf Length

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

Chasmanthium latifolium: Leaf Value To Gardener

Edible
Fragrant
Good Cut
Good Dried
Long-lasting
Showy

Chasmanthium latifolium: Leaf Width

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

Chasmanthium latifolium Stem

Chasmanthium latifolium: Stem Description

Green and smooth

Chasmanthium latifolium: Stem Color

grass
Green

Chasmanthium latifolium: Stem Is Aromatic

No
Yes

Chasmanthium latifolium: Stem Cross Section

Angular
Oval
Round
Square

Chasmanthium latifolium: Stem Surface

Corky Ridges
Covered with a powdery bloom (glaucous)
Dull
Hairy (pubescent)
Polished
Smooth (glabrous)

Chasmanthium latifolium Whole Plant Traits

Chasmanthium latifolium: 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

Chasmanthium latifolium: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Chasmanthium latifolium: 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

Chasmanthium latifolium: Growth Rate

Slow
Medium
Rapid

Chasmanthium latifolium: Maintenance

Low
Medium
High

Chasmanthium latifolium: Texture

Fine
Medium
Coarse

Chasmanthium latifolium Cultural Conditions

Chasmanthium latifolium: 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)

Chasmanthium latifolium: Soil Drainage

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

Chasmanthium latifolium: 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

Chasmanthium latifolium: NC Region

Coastal
Mountains
Piedmont

Chasmanthium latifolium: USDA Plant Hardiness Zone

thermostat
5a
thermostat
5b
thermostat
6a
thermostat
6b
thermostat
7a
thermostat
7b
thermostat
8a
thermostat
8b
thermostat
9a
thermostat
9b

Chasmanthium latifolium: Soil Texture

Clay
High Organic Matter
Loam (Silt)
Sand
Shallow Rocky

Chasmanthium latifolium Landscape

Chasmanthium latifolium: 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

Chasmanthium latifolium: 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

Chasmanthium latifolium: 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

Chasmanthium latifolium: 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

Chasmanthium latifolium: Attracts

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

Chasmanthium latifolium: 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