SAGITTARIA AND LOPHOTOCARPUS. 57 
the St. Petersburg Academy, by a specimen collected by Dr. Engelmann 
at New Orleans. There is in Herb. Engelmann, a very long-pediceled 
specimen of platyphylla from Louisiana which has been mistakenly 
called Mexicana. This is undoubtedly the same as the plant in the St. 
Petersburg Herbarium. As far as known, S. Mexicana does not occur in 
the United States. 
++ Achenium quadrate cuneate, beak short and triangular; leaves 
entire, pseudo-penninerved; bracts connate at the base. 
S. Sanrorpi, Greene, Pittonia, 2: 158, 1890. 
Monoecious, 9 to 15 dm. high, rigidly erect or ascend- 
ing; petioles rigid, 2 to 4 cm. thick at the base, obtusely 
triquetrous; blade linear lanceolate to oblong lanceolate, 
acute, tapering into the spongy petiole; scape simple, stout ; 
bracts triangular, obtuse, 5 to 7 mm. long; verticils numer- 
ous, approximate, 2 to 3 lower ones fertile; fertile pedi- 
cels 15 to 20 mm. long, reflexed in fruit; sepals ovate, 
acute, 4 to 6 mm. long; stamens about 20, the oblong 
anther longer than the dilated glabrous filament; achenia 
numerous, 2 mm. long, winged on both margins, the sides 
reticulate, with or without a costate lateral angle; beak 
short, oblique, triangular; fruiting head 12 to 14 mm. in 
diameter. Triangular, alternate, spongy phyllodia several 
decimeters long are present when the plant is nearly or 
quite submerged. — Growing in the marshes along the 
lower San Joaquin River, California. Specimens examined 
from Stockton, Cal., collected by J. A. Sanford, 1891, and 
1893. We are indebted to Mr. Sanford for fresh material 
of this species, and for water color habit sketches drawn 
under his direction by Dr. Hudson of Stockton.— Plate 28. 
B. Fertile sepals erect and accrescent; pedicels of the pistillate 
flowers thickened and reflexed in fruit; petals cream white with a 
brownish purple spot at the base. Introduced species. 
S. Montevipensis Cham. and Schlecht. Plant. Roman- 
zoff. Linnaea 2: 156 (1827). Micheli in DC. Monog. 
Phan. 3: 75 (1881). 
Monoecious; petioles stout, rigid, erect, ascending; 
leaves sagittate, acute or obtuse, 1 to 5 dm. long and 
31 
