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Northeast Wetland Flora

Field Office Guide to Plant Species

Annual Fimbry
Frimbristylis annua (All.) Roem. & J.A. Schultes

JPG -- Species Photo JPG -- Distribution Map

Family: Sedge (Cyperaceae)
Flowering: July-October
Field Marks: This is the only annual fimbry that has an open umbel of spikelets and ciliate styles.
Habitat: Wet or dry soil.
Habit: Annual herb with fibrous roots.
Stems: Upright, branched or unbranched, slender, flattened, grooved, up to 15 inches tall.
Leaves: Elongated, flat, linear, sometimes glaucous, up to 1/10 inch wide, smooth except for the ciliate edges.
Flowers: Several in spikelets, the spikelets solitary or several in an open umbel; bracts thread-like.
Spikelets: Ovoid, up to 1/2 inch long, stalked; scales ovate, rounded or slightly pointed at the tip, brown, smooth.
Sepals: 0.
Petals: 0.
Stamens: 1.
Pistils: Ovary superior; styles ciliate.
Fruits: Achenes obovoid, gray to straw-colored, up to 1/16 inch long, warty.
Notes: The achenes are eaten by waterfowl.

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Page Last Modified: Thursday, 03-Aug-2006 11:39:25 EDT
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