56 TRIANDRIA MONOGYNIA, Scirpus. 
latis, stylis trifidis, umbella decomposita, culmo tereti. 
Vahl. enum. pl. 2. p.267. Willd. sp. pl. 1. p. 296. 
Icon, Fi. dan. t. 1142. Host. gram. 3. t. O1. 
In stagnant waters: Canada to Carolina. X. July. v. v. 
validus. 14. S. aphyllus, spicis ovato-oblongis, squamis dorso villosis, 
stylis bifidis, umbella decomposita, involucro brevis- 
simo apice tereti. Vahl. enum. pl. 2. p. 268. 
Tn lakes and ponds: Canada to Carolina, YJ. Aug. v.v. 
From four to ten feet high. 
robustus. 15. S, spicis oblongis, corymbo composito, involucris poly- 
phyllis longissimis, involucellis ovatis longissime aris- 
tatis, squamis acutis aristatis, apice laceris, culmo tri- 
quetro folioso. 
S. maritimus 8 macrostachyos, Mich. fl. amer. 1. p. 32. 
In salt-marshes and on the banks of rivers, common. 
Y. Aug. v.v. Certainly specifically distinct from 
S. maritimus, with which I carefully compared it. 
americanus. 16, S, spiculis sessilibus conglomeratis oblongo-ovatis mu- 
_ crone brevioribus, culmo acute triquetro nudo. Pers. 
` ench. 1. p.68. 
S. triqueter. Mich. fl. amer.1.9.30. 
In salt marshes, frequent. f. July, Aug. v. v. 
lwaticus. 17. S. spicis oblongis congestis, corymbo supradecomposito 
x folioso, squamis oblongis obtusiusculis viridibus, cul- 
mo folioso trigono, 
Icon. Host. gram. 3. t.68. Fl. dan. 1. 307. 
In Canada. Michaux. Y. +. 
exaltatus, 18, S. spicis brevi-ovatis congestis, corymbo composito, 
squamis rhomboideis carinatis muctonatis coloratis, 
. culmo folioso obtuse IM 
S. brunneus, Muhib. in 
viviparus, B-S. culmo altissimo subscandente, corymbis vivi basi 
ramulorum floriferis pais 
In shady woods: New York to Carolina. XY. July, 
_ Aug. v. v. The viviparous variety grows in deep shady 
swamps, and frequently acquires the height- of ten 
feet and more, 
nilens, 19. S.s beds ovatis pedicellatis, corymbis subcompositis ax- 
A — busque, culmo tereti, Vahl. enum. 
pt. 2. p. 
In Virginia and Carolina, X. July. v. v. 
. .. 90, S. spicis oblongo-ovatis pedicellatis, corymbis iid 
* 7. , terminalibusque supradecompositis, pedunculis elon- 
