Scirpus pungens
[Scirpus americanus]
Three-square bulrush

Three-square might first be encountered as a stand of dark-green triangular stems growing in the mud of a lake shore. The entire plant is eaten by geese and muskrats.


Three-square is a bulrush sedge. stems sharply triangular, to 3 ft. tall; leaf blades very few, to 8 in. long, strongly folded; inflorescence a cluster of 1-5 brown spikelets, at stem tip (but looks like on the side of the stem); bract as in other species: appears as a continuation of the stem above the inflorescence, to 5 in. long; spikelets cone-shaped, brown, to 3/4 in. long, scales spiral and overlapping, scales attach in a small V notch; nutlet with 4 sharp bristles

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