24 ALISMACEAE 
: dc clipe S e Leaves erect; blade linear or linear-lanceolate, 2-3 
ong, or wanting, t onere slender: scape 5-15 cm. tall, with 1 or 2 
"pua -whorls: edd cel ely few, abou 
Fla. to Ala. a 
Small. . Leaves few; 
blade es liste E^ ovate-elliptic 1.5-5 cm 
long, the phyllodia linear, wider than the 
petioles: scape with l—few flower-whorls: 
flowers floating: achenes few, t 2 
long, bea Lund [S. 
3. 8. rata acs Small. Leaves PR dps VR elongate-linear, often 
rather pos: phyllodia which sometimes are up to 250 em. long, 3-5-ribbe b 
t bout a 5 the 
least in age: scape a dics Ra E eaves: io whorls usually 4— 
flowers floating: achenes nd 2.5 mm. long, the beak irm 
Streams and springs, Fla. and adj. pos Plain of pus and Ga.; perhaps N 
along the coast. The plan un of the northern states, sometimes referred here, 
may represent a different species—An apparently extremely large Lu of 
S. lorata in the Wakulla River, Fla., has been pur ed S. Kurziana Gliic 
S. filiformis J. G. Smith. Leaf-blades ens cape 6-12 dm. long, with 
eral flower-whorls; only 1 or 2 flowers of the lower whorls ie their 
pedicels elongate: fruit-head 6—7 mm. thick: Pd ene 1.5 mm. long, about 
ii crested, the beak o YP: —Ponds, Coastal Plain, Fla. and Ala.; appar- 
ently also in the Car 
5. S. platyphylla x es J. G. Smith. Leaf-blades lanceolate, elliptic, or 
ovate, 5-15 em. long: scape 2-5 dm. tall, with 3-8 flower whor ls, the flowe 
0 mm. thick: achenes 2 mm. long, winged, the beak horizontal ——Ponds and 
swamps, various provinces, Ala. to Tex., Kans., and Mo. 
6. S. teres S. Wats. Leaf-blades narrow ud imperfect, or wanting: scape 
1.5—4.5 dm. tall, with 1 or rarely 2 or 3 din -whorls, 1 or 2 flowers of the 
lower whorl pistilate: fruit-head 8-12 mm. thick: achene 2 long, un- 
evenly crested, the beak reel erect shallow water, Coastal Plain and Nev ew 
England Coast, S. C. to Mas 
7. S. isoetiformis J. G. Smith. Leaf- blades wanting or aA scape 
7-12 dm uar tn with 1 flower whorl: fruit-head about 6 mm. thick: 
achene 1 long, dorsally Cas ge pow cae i e.—Low grounds and eee 
Beim. Coastal Plain, Fla. 
8. S. p (J. G. Smith) " rd Leaf-blades linear or linear-lanceo- 
late, 4-15 em. long, or wanting: scape 2-8 dm. long, gee with 3-15 flower- 
whorls: fruit. head barely 10 mm. thick: achene 1.5 m m. long, the minute beak 
ascending.—Swamps, Coastal Plain, Fla. to La. and S. C. 
9. S. Mohrii J. G. Smith. Leaf aia linear to lanceolate, 5-15 c ong, 
dicemus oe scape 4—9 dm. long, with 6-8 ower-whorls: fruit. DET 
6-8 m : achene 2.5-3.5 mm. long, the large beak horizontal.—Ponds, 
Coastal Plain, Fla. to Miss. and Ga. 
10. S. graminea ien Leaf-blades linear, lanceolate, or ndo e, 5-15 c 
long, or wanting: scape E m dm . ta e ps fe uF or many flower-whorls: fruit. 
head less than 10 n mm. : achene ong, winged, tlie minute beak 
horizontal.—Mud and eri various Resa Tu to Tex., Sask., and Newf. 
