• Photo of Crinum americanum (Crinum americanums)

Plant Profile: Crinum americanum

Taxonomy: Crinum americanum

Names

Crinum Lily, Florida Swamp-Lily, Seven Sisters, Southern Swamp Lily, String Lily

  • Photo of Crinum americanum (Crinum americanums)

Phonetic Spelling:KRY-num a-mer-ih-KAY-num

Genus:Crinum

Species:americanum

Family:Amaryllidaceae

The Southern Swamp Lily is a perennial bulb belonging to the Amaryllis family. This plant thrives in wetland areas, including swamps, marshes, and the banks of streams, stretching from North Carolina to Florida and as far west as Texas. Typically, it grows in small clusters within still-water environments, favoring water depths between 1 to 6 inches, although it can tolerate depths of up to 12 inches.

While it naturally flourishes in wet habitats, the Southern Swamp Lily can also adapt to moist garden settings or be cultivated in containers that maintain a consistently wet environment. When potting, choose a container that is only 2 inches larger than the bulb itself. For garden cultivation, it is advisable to apply a thick layer of mulch during winter. This plant is well-suited for water gardens, as well as areas near streams, ponds, or bogs, and it thrives best in full sun to partial shade. Once planted, it is crucial not to disturb the bulbs, as this may delay blooming for 2 to 3 years.

Crinum americanum Feature Summary

Crinum americanum Image Gallery

Tags

#bulb
#showy flowers
#water garden
#fragrant flowers
#houseplant
#perennial
#white flowers
#interiorscape
#water plant
#stream banks
#herbaceous
#ponds
#large flowers
#native garden
#long bloom time
#native water plant
#wet soils tolerant
#bog gardens

Similar Plants

Crinum americanum Feature Summary

Attributes
South East U.S.A. to Mexico and W. Caribbean
AL , AR , FL , GA , LA , MS , NC , SC , TX
Submerged portions provide habitats for many micro and macroinvertebrates. These invertebrates, in turn, are used as food by fish and other wildlife species (e.g. amphibians, reptiles, ducks, etc.). After aquatic plants die, their decomposition by bacteria and fungi provides food (called “detritus”) for many aquatic invertebrates
Perennial
Fruit
The fruit is a capsule, with large, fleshy seeds
Flowers
Large lily-like flowers are up to 4 inches across and long and appear in umbrels of 2-6. They have long narrow separated petals that curve back. They are white to blush pink with long purple stamens and anthers extending outward. Blooms June- Nov.
Pink
White
Fragrant
Showy
Long Bloom Season
6 petals/rays
3-6 inches
Leaves
Long green strap-like leaves are 2-4 feet long and 2-3 inches wide and arise directly from the bulb.
Deciduous
Broadleaf Evergreen
Lanceolate
> 6 inches
1-3 inches
Stem
The long reddish naked stem is I inch in diameter and arises directly from the bulb.
Poisonous to Humans
Nausea, stomach pain, vomiting and diarrhea.
Seeds
Leaves
Stems
Sap/Juice
Flowers
Roots
Whole Plant Traits
Native Plant
Poisonous
Water Plant
Deciduous
Broadleaf Evergreen
Arching
Erect
Medium
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)
Acid (<6.0)
Occasionally Wet
Frequent Standing Water
Coastal
Piedmont
8b
8a
9a
9b
10a
10b
11a
11b
Clay
High Organic Matter
Loam (Silt)
Sand
Landscape
Rain Garden
Water Garden
Mass Planting
Small groups
Container
Pond

Crinum americanum Attributes

Crinum americanum: Country Or Region Of Origin

South East U.S.A. to Mexico and W. Caribbean

Crinum americanum: Distribution

AL , AR , FL , GA , LA , MS , NC , SC , TX

Crinum americanum: Wildlife Value

Submerged portions provide habitats for many micro and macroinvertebrates. These invertebrates, in turn, are used as food by fish and other wildlife species (e.g. amphibians, reptiles, ducks, etc.). After aquatic plants die, their decomposition by bacteria and fungi provides food (called “detritus”) for many aquatic invertebrates

Crinum americanum: Life Cycle

Annual
Biennial
Bulb
Perennial
Woody

Crinum americanum Fruit

Crinum americanum: Fruit Description

The fruit is a capsule, with large, fleshy seeds

Crinum americanum: Fruit Type

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

Crinum americanum: Display/Harvest Time

Fall
Spring
Summer
Winter

Crinum americanum Flowers

Crinum americanum: Flower Description

Large lily-like flowers are up to 4 inches across and long and appear in umbrels of 2-6. They have long narrow separated petals that curve back. They are white to blush pink with long purple stamens and anthers extending outward. Blooms June- Nov.

Crinum americanum: Flower Color

filter_vintage
Pink
filter_vintage
White

Crinum americanum: Flower Inflorescence

Catkin
Corymb
Cyme
Head
Insignificant
Panicle
Raceme
Solitary
Spadix
Spike
Umbel

Crinum americanum: Flower Value To Gardener

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

Crinum americanum: Flower Bloom Time

Winter
Spring
Summer
Fall

Crinum americanum: 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

Crinum americanum: Flower Shape

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

Crinum americanum: Flower Size

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

Crinum americanum Leaves

Crinum americanum: Leaf Description

Long green strap-like leaves are 2-4 feet long and 2-3 inches wide and arise directly from the bulb.

Crinum americanum: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Crinum americanum: Leaf Color

spa
Green

Crinum americanum: Leaf Type

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

Crinum americanum: 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

Crinum americanum: Leaf Margin

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

Crinum americanum: Hairs Present

No
Yes

Crinum americanum: Leaf Length

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

Crinum americanum: Leaf Width

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

Crinum americanum Stem

Crinum americanum: Stem Description

The long reddish naked stem is I inch in diameter and arises directly from the bulb.

Crinum americanum: Stem Color

grass
Green

Crinum americanum: Stem Is Aromatic

No
Yes

Crinum americanum Poisonous to Humans

Crinum americanum: Poison Symptoms

Nausea, stomach pain, vomiting and diarrhea.

Crinum americanum: Poison Toxic Principle

Alkaloids

Crinum americanum: Poison Severity

High
Low
Medium

Crinum americanum: Causes Contact Dermatitis

No
Yes

Crinum americanum: Poison Part

Bark
Flowers
Fruits
Leaves
Roots
Sap/Juice
Seeds
Stems

Crinum americanum Whole Plant Traits

Crinum americanum: 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

Crinum americanum: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Crinum americanum: 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

Crinum americanum: Growth Rate

Slow
Medium
Rapid

Crinum americanum: Maintenance

Low
Medium
High

Crinum americanum: Texture

Fine
Medium
Coarse

Crinum americanum Cultural Conditions

Crinum americanum: 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)

Crinum americanum: Soil pH

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

Crinum americanum: Soil Drainage

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

Crinum americanum: 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

Crinum americanum: NC Region

Coastal
Mountains
Piedmont

Crinum americanum: USDA Plant Hardiness Zone

thermostat
10a
thermostat
10b
thermostat
11a
thermostat
11b
thermostat
8a
thermostat
8b
thermostat
9a
thermostat
9b

Crinum americanum: Soil Texture

Clay
High Organic Matter
Loam (Silt)
Sand
Shallow Rocky

Crinum americanum Landscape

Crinum americanum: 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

Crinum americanum: 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

Crinum americanum: 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

Crinum americanum: 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

Crinum americanum: Attracts

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