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Bransford, W.D. and Dolphia
Crinum americanum L.
American crinum lily, Seven sisters, Swamp lily, Southern swamp lily, String lily, Crinum lily
Synonym(s): Crinum floridanum, Crinum strictum, Crinum strictum var. traubii
USDA Symbol: cram2
USDA Native Status: L48 (N)
Swamp lilies are erect plants that grow in small clumps. The leaves grow directly from the bulb and are 2–4 feet long and 2–3 inches wide. The flower stem is about 1 inch in diameter, 2–3 feet tall, with 2–6 flowers forming a showy umber at the top. The fragrant flowers are white, sometimes marked with pink. The sepals are 3–4 inches long and 1/2 inch wide. They are joined at the base, forming a long tube, but curve backward at the end to form a ball-shaped blossom. The upper half of the stamen is purple, with purple anthers extending out from the blossom as the sepals curve backward.
Some authorities place this beautiful flower in the amaryllis family instead of the lily family. It differs from many lilies in that its floral parts are attached above the ovary rather than below.
Plant CharacteristicsDuration: Perennial Habit: Shrub Leaf Complexity: Simple Flower:
Flowers 4 inches.
Fruit: Size Class:
Bloom InformationBloom Color: White
Bloom Time: Jun , Jul , Aug , Sep , Oct , Nov
, TX Native Distribution:
w. to s.e. coastal TX Native Habitat:
Freshwater marshes; cypress swamps, ditch & lake edges
Growing ConditionsWater Use: Medium
Light Requirement: Part Shade
Soil Moisture: Wet
Soil Description: Wet, rich soils. Sandy, Sandy Loam, Medium Loam, Clay Loam, Clay, Acid-based, Calcareous.
Conditions Comments: Not fussy about the amount of sun or shade it gets. Will bloom in deep shade. Freezes back to water level in winter, but greens up again immediately.
BenefitUse Ornamental: Water garden, Bog or pond area, Aromatic, Blooms ornamental
Conspicuous Flowers: yes
National Wetland Indicator Status
|Status:|| OBL |
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1
(Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here
for map of regions.
From the National Organizations Directory
According to the species list provided by Affiliate Organizations, this plant is either on display or available from the following:
Texas Discovery Gardens
- Dallas, TXCrosby Arboretum
- Picayune, MS
Record Last Modified: 2013-09-11
Research By: TWC Staff