SAGITTARIA AND LOPHOTOCARPUS. 53 
S. cristata Engelm. in Arthur’s Contributions to the 
Flora of Iowa, no. 5, 3 (1882). Proc. Davenport 
Acad. Nat. Sci. 4: 29 (1886). 
Monoecious, slender, erect, 30 to 75 cm. high, submersed 
or in shallow water; leaves linear-lanceolate or rarely 
elliptical lanceolate, 6 to 10 cm. long, 1 to 2 cm. wide, 
thick, spongy, triquetrous in cross section; petioles long 
and slender; scape simple, erect, the flowers at or above the 
surface of the water; verticils 4 to 6, the lowest fertile; 
bracts 5 to 7 mm. long, acute; fertile pedicels ascending, 
1.5 to 3 cm. long; flowers about 2 cm. across; sepals ovate, 
obtuse, scarious tipped, rough on the veins; stamens about 
24; filaments dilated subulate, pubescent at the middle, 
longer than the anthers; achenium 3 mm. long, dorsally 
crenately crested, ventral margin straight winged, an inter- 
rupted crenate crest on each side, beak short; fruiting head 
globose, 15 to 20 mm. in diameter. Often with tufted 
phyllodia, flat, linear lanceolate, acute, 1 dm. long. In 
deep water, the petioles and scape are spongy and rigid. 
The phyllodia grow from the nodes of the stolons along the 
muddy bottom, to the depth of 1 or 2 m. or more.— Ponds 
and lakes, northern Iowa, southern Minnesota and (?) 
western New York. Engelmann’s type specimens were 
collected by R. I. Cratty, Emmett Co., Iowa, 1881, — 
Plate 22. 
Specimens also examined from Minnesota (Sandberg, 623, Minnetonka, 
1891; Herrick, 1878; Aiton, Minneapolis, 1891; Ballard, 603, Scott Co., 
1891; Sheldon, 705, White Bear, 1891; Wood, Chub Lake, 1889); New 
York (?) Dr. Sartwell in Herb. Gray). 
S. MACROCARPA, 0. sp. 
Monoecious, slender, 3 to 4 dm. high, suberect; phyl- 
lodia flexuous, 25 to 30 cm. long, gradually expanding 
above to a linear lanceolate blade 5 to 7 cm. long, 3 to 5 
mm. wide; scape slender, equaling or exceeding the leaves, 
simple; verticils few, 3 to 5, about the length of the pedi- 
cels apart; bracts ovate, acute, 3mm. long, connate; 1 to 
3 flowers of lowest verticil perfect, their pedicels slender, 
27 
