Comprehensive Description
provided by North American Flora
Lophotocarpus spongiosus (Engelm.) J. G. Smith, Rep. Mo. Bot
Gard. 11 : 148. 1899.
Sagittaria calycina spongiosa Engelm. in A. Gray, Man. ed. 5. 493. 1867.
Plants submerged ; leaves 1-2 dm. tall, the petioles stout and spongy, conspicuously nodose-septate, the blades spatulate, oblong, elliptic, sagittate or hastate, 1-3 cm. long, the basal lobes, when present, more or less falcate ; scapes about one half as long as the leaves or less, the inflorescence simple, with one or two whorls ; sepals broadly ovate or orbicularovate, becoming 10-12 mm. long ; fruit-bearing pedicels very stout, 1-2 cm. long, or rarely longer; fruit-heads 7-10 mm. in diameter; achenes cuneate, 2-2.5 mm. long, the beak short, at the top of the achene-body, the dorsal wing thin.
Type locality : Northeastern Atlantic States. Distribution : New Brunswick to Virginia.
- bibliographic citation
- Percy Wilson, Per Axel Rydberg, Norman Taylor, Nathaniel Lord Britton, John Kunkel Small, George Valentine Nash. 1909. PANDANALES-POALES; TYPHACEAE, SPARGANACEAE, ELODEACEAE, HYDROCHARITACEAE, ZANNICHELLIACEAE, ZOSTERACEAE, CYMODOCEACEAE, NAIADACEAE, LILAEACEAE, SCHEUCHZERIACEAE, ALISMACEAE, BUTOMACEAE, POACEAE (pars). North American flora. vol 17(1). New York Botanical Garden, New York, NY
