- 
+4 s | E APPENDIX D.—BOTANY. 395 
bifid at the summit. The spikes are cylindrical and are not 
ointed; the flowers being alternate, and immersed in deep exea- 
vations of the Se e calyx is quadrangular, and co! 
of four cohering sepals, which are cucullate, spongy summit, 
and at length separate from each other. There is but a solitary = = 
stamen. The seed is loose in the utricle, oblong, and the embryo a 
forms about half of an ellipse. re 
Osione CANESCENS, Mog. Chenop. p. 74, and 0O. anes talis, 
Moq. in D C. Prodr. 11, p. 112. Pterochiton occidentale, T r- and 
Frém., in Frém. second Rep. p. 318. Obione tetraptera, a. 
Bot. Voy. Sulph. p. 48.—On Green River. Fr. September 10, 
is is a variable species, especially in the characters of 
mature fructiferous calyx. ometimes it is furnished with short, 
irregular-toothed wings, and at other times the wings are very % 
broad and ‘nearly entire. 
O. conrertirtora, Torr. and Frém. 1. e—With the preceding. » 
AproytA MELLIFERA, Doug. Mss. Hook. Fl. Bor. Amer. [p. 2, a 
125, Bot. Mag. 1. 2879.—Strong’s Knob, Salt Lake. Fi. June 10, 
Easily Sistingnichad from A. mabeilita by its broad involucral 
leaves and green flowers. In Frémont’s first Report, p. and ‘ 
in Emory’s Report, p. 149, I noticed a peculiarity of the embryo; 
the inner cotyledon being constantly abortive. The same Cc 
ter exists in all the species of this genus: but I have not observed. 
it in any other nyctagineous plant. : a 
Sueruerpra arcenTes, Nutt. Gen. Amer. Pl, 2-—Black’s 
Fork of the Green River. Fr. September 12. 
Ernepra Amentcana, Willd. Spec. Pl. 4, p. 860? Endl. synoni 
Conif. p. 254.—Shore of the Salt Lake. A leafless shrub with 
umerous branches, growing about four feet high. It is very 
‘lla é 
native of Quito. Although it is not uncommon in the interior of 
California and in New Mexico, T have never received the female 
Report cai the name of Z. occidentalis, (a mistake for E. Ameri- 
cana,) differs from this ppecies in its three-parted sheaths with longa i Bere. 
 subulate points. 
