Kansas Arrowhead

Herbs, perennial, to 90 cm; rhizomes absent; stolons present; corms present. Leaves emersed; petiole triangular, 15--54 cm; blade lanceolate to ovate, 5--20 ´ 1--10.5 cm. Inflorescences racemes, rarely panicles, of 2--11 whorls, emersed; bracts scarcely connate proximally, linear to lanceolate, 10--30 mm, delicate, not papillose; fruiting pedicels spreading to ascending, cylindric, 1.5--3.5 cm. Flowers to 23 mm diam.; sepals recurved, not enclosing flower or fruiting head; filaments linear, shorter than anthers, glabrous; pistillate pedicellate, without ring of stamens. Fruiting heads 0.8--1.2 cm diam; achenes cuneate-obovoid, abaxially keeled, 1.5--2.1 ´ 0.8--1.5 mm, beaked; faces not tuberculate, wings 0--1, ± entire, glands absent; beak lateral, horizontal or incurved, 0.1--0.2 mm.

Ill., Ind., Kans., Mo., Okla.

Flowering spring--summer (Apr--Sep).

Pond and lake shores, shallow water, ditches, and damp areas; of conservation concern; 100--1000m.

Sagittaria ambigua J. G. Smith, Rep. Mo. Bot
Gard. 6 : 48. 1894.
Plants mostly emersed, 3-8 dm. tall ; leaves erect, the blades lanceolate, 12-50 cm. long, 5-nerved, shorter than the petioles; scapes as long as the leaves or surpassing them, simple ; whorls of the inflorescence rather numerous, commonly 8-15 ; pedicels mostly ascending, those of the pistillate flowers longer than those of the staminate ; bracts lanceolate, 10-15 mm. long, united at the base ; sepals oblong or nearly so, becoming 6-8 mm. long ; filaments not dilated, glabrous ; anthers shorter than the filaments ; fruit-heads 12-15 mm. in diameter; achenes oblong, slightly curved, 2 mm. long, narrowly winged, each prolonged into a short horizontal beak at the top.
Type locality : Oklahoma. Distribution : Kansas and Oklahoma.

Sagittaria ambigua, the Kansas arrowhead, is an aquatic plant species native to the central United States (Indiana, Illinois, Arkansas, Missouri, Kansas and Oklahoma). It grows in wet areas, mostly along the shores of ponds and waterways.

Sagittaria ambigua is a perennial herb up to 90 cm (3.0 ft) tall. Leaves are broadly lanceolate, the blade up to 20 cm (7.9 in) long and 12 cm (4.5 in) wide.