934 Engelmann and Gray, 
not in sufficient abundance for distribution. It is a less hairy 
plant. Under No. 306 we describe a foürth species, A. hu- 
milis, which we also find in Drummond's second collection, 
No. 930. 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. 963 of the second. collection they are 
mostly ovate-orbicular. i 
176. TRACIA URTICÆFOLIA, Micha. Houston, &c. April. 
. T. betonicæfolia, Nutt. ? vi 
177. Puytiuanruts PoLYaoNorpzs, Nutt. (Maschalanthus, 
Nutt. = Phyllanthus proper, Linn., Juss., etc.) Grassy banks. 
July. : 
178. Cyrposcotus  sriMULOsUs. = Jatropha stimulosa, 
Linn. Houston. July. . 
' — 119. Urtica purpurascens, Nutt. in Trans. Amer. Phil. 
Soc. (N. Ser.) V. p. 169. Thickets, Galveston Island. 
; “180. Quercus vinENs, Ait. Moist woods. along the 
coast. f à i 
181. Taxopium pisticnum, Rich. Houston, &c. à 
182. Sacrrranta stupiex, 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 0n 
. 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 (m. sp.): stolonibus radicantibus ; 
foliis submersis lato-linearibus acutis, emersis lineari-lan A 
tis 3—5-nerviis; scapo simplici; bracteis ovatis acutis Ve 
obtusiusculis brevibus; pedunculis subternatis omnibus elon- 
satis ; staminibus 12-16 ; carpellis compressis oblique sūbor- 
biculatis breviter mucronatis. — S. graminea, Nutt. in Trans. 
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