Northern Prairie Wildlife Research Center
Northern Spiderlily (Hymenocallis occidentalis)
- Family: Lily (Liliaceae)
- Flowering: July-September.
- Field Marks: This species is distinguished by its large, strap-shaped, toothless basal leaves and its large, white flowers with 6 petal-like structures and a white membranaceous "cup" between the petals and the stamens.
- Habitat: Swamps, wet woods.
- Habit: Perennial herb with bulbs.
- Stems: Bearing flowers only, smooth, as long as or longer than the leaves, up to 3 feet long.
- Leaves: Basal, strap-shaped, pointed at the tip, tapering to the base, without teeth, smooth, somewhat fleshy, up to 2 feet long and up to 2 inches broad.
- Flowers: Solitary or few in a terminal umbel, white, up to 6 inches across.
- Sepals and Petals: Similar, 6, white, spreading or curved downward, long and narrow, up to 3 inches long, united below to form a slender tube up to 5 inches long.
- Stamens: 6, attached to the top of the perianth tube, the filaments connected at their base by a membranaceous, white "cup."
- Pistils: Style 1; ovary inferior.
- Fruits: Capsules ovoid to spherical, fleshy, up to 3/4 inch in diameter.
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