Part 1, 1909] ALISMACEAE 61 
30. Sagittaria viscosa C. Mohr, Bull. Torrey Club 24: 19. 1897. 
Plants mostly emersed, 4-8 dm. tall; leaves erect or nearly so, the blades broadly ovate, 
2-3.5 dm. long, rounded to the apiculate apex; the basal lobes ovate, acute or acuminate, 
as long as the terminal lobe or shorter; scapes erect, overtopping the leaves, or rarely 
shorter, simple or branched; whorls of the inflorescence mostly 8-10; pedicels’ slender, of 
nearly equal length throughout; bracts leathery, ovate or ovate-oblong, obtuse, papillose, 
rugose and viscid; sepals leathery, becoming 7-8 mm. long, roughened and viscid like the 
bracts ; corollas fully 1 cm. broad ; filaments not dilated, pubescent; anthers shorter than 
the filaments; achenes not seen. 
TYPE LOCALITY: Along the Mobile River, Alabama, 
DISTRIBUTION: Southern Alabama and Florida, 
ILLUSTRATION: Bull. Torrey Club 24: f/. 289. 
31. Sagittaria Engelmanniana J. G. Smith, Rep. Mo. Bot. 
Gard. 6: 41. 1894. 
Sagitiaria variabilis (?) gracilis 8. Wats. in A. Gray, Man. ed. 6. 555, in part. 1889. Not 
S. variabilis gracilis Engelm. 1856. 
Plants emersed or sometimes partially submerged, 2-9 dm. tall; leaves erect or nearly 
so, the blades narrow, 8-20 cm. long, the terminal lobe linear to lanceolate, the basal lobes 
linear or nearly so, commonly about as long as the terminal lobe; scapes about as tall as 
the leaves, simple; whorls of inflorescence 5-6, remote; bracts ovate or ovate-lanceolate, 
8-12 mm. long, obtuse or acutish; pedicels ascending, those of the staminate flowers often 
longer than those of the pistillate; sepals ovate, becoming 7-8 mm. long, acute; filaments 
not dilated, glabrous; anthers shorter than the filaments; fruit-heads subglobose, 12-16 
mm. in diameter; achenes cuneate, 44.5 mm. long, with 2 usually prominent facial wings 
on each side and sometimes a less prominent wing between them, the slender beak erect, 
but often curved inward or outward at the apex, one half as long as the achene-body or less. 
TYPE LOCALITY: Uxbridge, Massachusetts. 
DISTRIBUTION: Massachusetts, Connecticut, and Rhode Island. 
ILLUSTRATIONS: Rep. Mo. Bot. Gard. 6: £/.9,; Britt. & Brown, Il. Fl. f. 194. 
32. Sagittaria longirostra (Micheli) J. G. Smith, Mem. Torrey 
Club 5:26. 1894. 
Sagittaria sagittifolia (?) longirosira Micheli, in DC. Monog. Phan. 3: 69. 1881. 
Plants emersed or partially submerged, 4-9 dm. tall; leaves erect or nearly so, the 
blades broad or narrow, 10-25 cm. long, the terminal lobe broadly ovate to linear, abruptly 
pointed or acuminate, the basal lobes ovate or oblong-lanceolate or narrowly linear, acute 
or acuminate, about one half as long as the blade or more; scapes erect, longer than the 
leaves, sharply 6-angled; whorls of the inflorescence few or several; bracts lanceolate or 
linear-lanceolate, acuminate; pedicels of the lower whorls 5-10 mm. long or rarely more; 
sepals becoming 6-8 mm. long; filaments not dilated, glabrous; anthers shorter than the 
filaments; fruitheads spheroidal, 12-18 mm. in diameter; achenes obovate or orbicular- 
obovate, 4 mm. long, with a broad and high, undulate or crest-like dorsal wing and usually 
asingle prominent facial wing on each side, the beak erect, but more or less curved at the 
tip, about one half as long as the body. 
TYPE LOCALITY: Alabama, 
DISTRIBUTION: New Jersey and Pennsylvania to Florida and Alabama. 
ILLUSTRATIONS : Britt. & Brown, Ill. Fl. f. 223; Rep. Mo. Bot, Gard. 6: pl. 20. 
33. Sagittaria australis (J. G. Smith) Small, Fl. SE. U. S. 45. 1903. 
Sagittaria longirostra australis J, G. Smith; C. Mohr, Bull. Torrey Club 24: 20. 1897. 
Plants emersed, 2-5 dm. tall; leaves erect or nearly so, the blades oval or suborbicular, 
8-10 cm. long, abruptly pointed at the apex, ciliate, the terminal lobe usually broader 
than long, the basal lobes ovate, barely one half as long as the blade, obtuse; scapes erect, 
pubescent about the nodes in the inflorescence, angled, overtopping the leaves ; whorls of the 
inflorescence 4-6, remote; bracts lanceolate, acuminate; pedicels of lower whorls 10-13 
