Delta Arrowhead

Sagittaria mohrii J. G. Smith; C. Mohr, Bull. Torrey
Club 24 : 19. 1897.
Plants partially emersed, 3-7 dm. tall ; leaves erect or ascending, the blades linear to lanceolate, 5-15 cm. long, acuminate, often poorly developed or wanting, the phyllodia then stiff and three-sided ; scapes ascending, decumbent or declining, 3-angled, commonly shorter than the longer leaves ; whorls of the inflorescence six to twelve, the lower three or four pistillate, with pedicels somewhat longer than those of the staminate flowers ; bracts thin, 3-A mm. long, united to about the middle ; sepals oblong, becoming 5-8 mm. long, obtuse ; corolla hardly 1 cm. broad or sometimes 1.5 cm. broad; fruit-heads subglobose, 6-8 mm. in diameter; achenes cuneate, 2.5-3.5 mm. long, narrowly winged, with a low facial ridge, the slender beak horizontal.
Type locality : Mobile, Alabama.
Distribution : Georgia, Florida, Alabama, and Mississippi.

Sagittaria platyphylla (Engelm.) J. G. Smith, Rep. Mo. Bot
Gard. 6 : 55. 1895.
Sagittaria graminea platyphylla Engelm. in A. Gray, Man. ed. 5. 494. 1867.
Plants emersed, erect ; leaves mostly with blad.es, but these sometimes accompanied by
narrow phyllodia, the blades thick and rather leathery, lanceolate, elliptic, or ovate, 5-15
cm. long, 5-7-nerved, acute or acuminate, gradually narrowed at the base or subcordate ;
scapes 2-5 dm. tall, usually overtopped by the leaves ; whorls of the inflorescence 3-8, the
2 or 4 lower ones pistillate; pedicels 1-2.5 cm. long ; bracts broadly ovate, 3-8 mm. long,
scarious-tipped ; sepals ovate or orbicular-ovate, becoming 4.5-6 mm. long; corolla 2.5-3
cm. wide; filaments pubescent; anthers oblong; fruit-heads fully 1 cm. in diameter;
achenes obliquely obovate, 2 mm. long, winged on both margins, the beak horizontal,
rather long.
Type locality : Not given.
Distribution : Missouri and Kansas to Alabama and Texas.