26 Engelmann and Gray, 
not in sufficient abundance for distribution. It is a less hairy 
plant. Under No. 306 we describe a fourth species, A. hu- 
milis, which we also find in Drummond’s second collection, 
No. 230. The leaves in A. mercurialina, as in A. Drum- 
mondii, often turn purplish, in drying. In No. 322 of Drum- 
mond’s third collection, the leaves are oblong-ovate, or ovate- 
lanceolate, and often acute or acuminate, as in Lindheimer’s 
specimens. In No. 263 of the second collection they are 
mostly ovate-orbicular. 
176. Traeta urticmrotia, Michx. Houston, &c. April. 
T. betoniczfolia, Nutt. ? 
177. Puytuanruus poLyconoivEs, Nutt. (Maschalanthus, 
Nutt. = Phyllanthus proper, Linn., Juss., etc.) Grassy banks. 
July. 
178. Cyrposcotus stiuLosus. = Jatropha _ stimulosa, 
Linn. Houston. July. 
179. Urtica purpurascens, Nutt. in Trans. Amer. Phil. 
Soc. (N. Ser.) V. p. 169. Thickets, Galveston Island. 
180. Quercus virens, Ait. Moist woods along the 
coast. 
181. Taxopium pisticnum, Rich. Houston, &c. 
182. Sacirrarra stmpLex, Pursh.? Ponds in clayey soil, 
near Houston. June—September. Our plant has rather 
rigid linear-lanceolate leaves; the calyx as well as the ovate 
acute bracts are a little pubescent; the fertile flowers are on 
short, the sterile on rather long peduncles ; the stamens from 
20 to 30; and the carpels in fruit are compressed, rostrate, 
and falcate. Larger specimens, collected near the coast, 
with broader leaves, &c. bear larger flowers, with 40 to 50 
stamens. 
183. S. srononirera (n. sp.): stolonibus radicantibus ; 
foliis submersis lato-linearibus acutis, emersis lineari-lanceola- 
tis 3—5-nerviis; scapo simplici; bracteis ovatis acutis vel 
obtusiusculis brevibus; pedunculis subternatis omnibus elon- 
gatis; staminibus 12-16; carpellis compressis oblique subor- 
biculatis breviter mucronatis. — 8. graminea, Nutt. in Trans. 
