30 ; Engelmann and Gray, 
spicis ovatis obtusis multifloris ; squamis rufescentibus mem- 
branaceis obtusis margine scariosis; stylo trifido; achenio 
obovato compresso triangulari opaco tuberculo distincto rostrato 
acuto multum majore setas 6 tenues subexcedente. — Galves- 
ton Island, May, creeping in the loose sand. (Also along the 
southern coast of the United States.) 
206. Scirpus tacustris, Linn. Galveston. May.’ 
207. SparTINa JUNCIFORMIs (”. sp.): humilis (1-2 peda- 
lis) ; foliis convolutis angustis, caulinis paucis brevibus, radi- 
calibus czespitosis culmum subequantibus ; spicis 8-10 oblongis 
sessilibus ad rachin leviusculam adpressis ; carina glumarum 
longitudine subequalium paleeeque inferioris ciliato-hispida. 
Saline prairies near the coast. May.— Plant with the foliage 
and much the aspect of S. juncea ; but with the spikes and 
flowers different from that species, as well as from S. levi- 
gata. A few specimens of a taller variety were collected in 
July. 
208. Ke@ierta truncata, Torr. Woods, Houston. May, 
209. Untona cracitis, Michx. Variety with broad and 
hairy leaves, the florets undeveloped. Houston. June. 
210. Pantcum (OrTHopoGon) HiIRTELLUM, Michx. Hous- 
ton. June. 
211. Anpropocon avenaceus, Michx. Houston. Sept. 
1 T wish to subjoin the character of a remarkable Scirpus, which has been discoy- 
ered this season, near Providence, Rhode Island, by Mr. Olney (the author of a Cata- 
lozue of Rhode Island Plants, 1845,) whose name | am desirous it should bear. 
Scirpus Oxneyi (n. sp. A. Gr.): culmis triquetro-alatis 2-7-pedalibus aphyllis 
basi vaginatis sub apice triangulari-subulate brevi capitulam sessilem, e spicis 6-12 
ovato-oblongis, gerentibus ; squamis orbiculatis mucronatis; antheris apice barbula- 
tis ; stylo bifido; setis 6 retrorsum hispidulis achenium obovatum plano-convexum 
gibbosum apiculatum vix equantibus. — In a salt marsh on the Seekonk river, Rhode 
Island, Mr. S. 7’. Olney. This species is most allied to S. pungens, Vahl, (S. 
Americanus, Pers.) from which it is especially distinguished by its remarkably 3- 
winged stem. The reéntering angles are so deep that the cross section presents the 
appearance of three rays, or plates with parallel sides, joined at a common centre. 
This species has just been detected on the coast of New Jersey by that very assidu- 
ous botanist, Dr. Knieskern, from whose specimens I have added the characters of 
the achenium; as the fruit has failed to ripen this year in the Rhode Island plant. 
A. Gr, 
