m 



i 



Ki 



as in that plant, the inner cotyledon of the conduplicate embryo 

 being abortive. It is wanting also in A. mellifera. In several 

 species of this genus, if not in all of them, the filaments adhere 

 throughout nearly their whole length to the tube of the perianth. 

 The lobes of the perianth are dilated, and deeply emarginate, but 

 appear ovate in the bud, from the lobules being conduplicate. 



CHENOPQDIACE.£E. 



Sarcobatus vermiculatus. S. Maximilioni, Nees in Prince Max- 

 im. Trav.) Engl, ed., p. 518. Fremontia vermicularis, Torr. in Frem. 

 1st report, p. 96; and 2d report, p. 317. Batis vermicular is, Hook. 

 ■ fi. Bor. Am. 2, p. 188. Abundant on the Del Norte, and upper 

 part of the valley of the Gila. 



This is the pulpy thorn of Lewis and Clark. It has a very ex- 

 tensive range in the desert regions on both sides of the mountains. 

 Since my notices of this plant were published in Fremont's reports, 

 I have ascertained that Nees' description of his genus Sarcobatus 

 dates a little anterior to mine, so that his name must be adopted. 



Obione argentea, Moq. Atriplex argentea, JYutt. Abundant in 

 sandy saline places on the Del Norte. 



O. polycarpa, n. sp. Valley of the Gila. 



Eurotia lanata, Moq. Valley of the Del Norte. A shrubby Sa- 

 licornia, an Atriplex, and a species of Sueda, were found in saline 

 soils along the Gila. 



AMARANTIIACEiE. 



Amaranthus hybridus, Var.1 Glabrous; stem and leaves nearly 

 smooth, flowers (purplish) crowded in a dense compound terminal 

 spike; bracts somewhat awned, shorter than the flowers; utricle 

 opening transversely. On the Del Norte, below Santa Fe\ 



Alternanthera'? (Endotheca) lanuginosa. — Achyranthes lan- 

 uginosa, JYutt. in Am. Phil. Trans., (JV. Ser.,) 5, p. 166. Abundant 

 on the sand hills above Socoro, along the Rio Del Norte. It spreads 

 on the ground, forming patches, and rooting at the joints. The 

 natives call it paga-paga. Nuttall referred this plant to Achy- 

 ranthes, but it is clearly not of that genus. For the present, it is 

 doubtfully placed in Alternanthera, but may hereafter be separated 

 as a distinct genus. The flowers are in small axillary sessile clus- 

 ters, and when the fruit is matured, they become imbedded in the 

 branches by the growth of the surrounding parts, so as to be en- 

 tirely concealed. The filaments are united into a cup at the base, 

 and leave minute, entire, intermediate teeth. The anthers are two- 

 celled before dehiscing, but afterwards one-celled, ovary, with a 

 single ovule; style almost wanting; stigma globose. This plant 

 was first discovered by Nuttall, on the north fork of the Canadian; 

 Colonel Fremont collected it on the upper Arkansas in his last ex- 

 pedition; it has also been found in Texas by Mr. Wright and by 

 Fendler and Dr. Gregg in New Mexico. 



