Ex. Doc. No. 41. 151 



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EUPHORBIACE^. 



Eremocarpus setigerus, Benth. in hot. of Sulvh., p. 53, t 26 

 Plains of San Diego, California. ^ ^ P-, ^'^> ?• ^^' 



Ilendecandi-a Texensis, Klotzsck. H. multiflora, Torr. in Frem 

 ^^i report. Crofon muricatum, JVutt. Valley of 'the Del Nort^' 



suffirinrf w"^'^-""' ^^ ^^^''^^' ^^^ '^' ^^terials are scarcely 

 suttic ent for determining it satisfactorily. ^ 



Millengia spinulosa, n sp. Suffruticose? leaves rhombic-o.^te, 

 Si.^r'"''?"^. f^ *^' ^''' prominently 3-nerved, mucronatel/ 



terr^n?] '; -1^^^'"'^'""^°'^ ^", ^^'^ ^^^^S^"^ spikes axillary and 

 terminal; sterile flowers sepile; bracts acuminate, with a stipitate 



gland on each side at the base. Abundant in the desert west of 

 me Colorado. Stem (apparently) about a span high, with spreading 

 m'n ^ • Leaves an inch or more in length, sessile, neatly mar- 

 ginea, with spreading spinulose teeth, glabrous on both sides. 

 ^piKes numerous; with solitary fertile flowers at the base. Sterile 

 nowers about as long as the scale. Perianth hemispherical, irreg- 

 ularly lobed and undulated. Stamens 2. Fertile flowers imperfect 

 in our specimens. Fruit glabrous. . 



^^uphorbia hernianoides, JVuit. Banks of the Gila. A pubes- 



ni variety of this species was found in the desert west of the 

 »^olorado. 



CUPULIFERiE. 



Quercus Emoryi, n. sp. Leaves coriaceous, oblong, on very 



crnn f^^^^° ^^' re°iotely and repandly toothed, the serratures mu- 



ronate smooth on both sides; fruit pedunculate, solitary and in 



annr A ^^^^^-^^^^^gj mucronate; cup hemispherical, the scales 

 ppressed. Common in the elevated country between the Del 



an/ n ^^^ ^^^^' ^^'^ s°^^^^ leaved oak resembles Q. agrifolia 



"? ^'"^ndulata, {Torr. in Ann. lye. JV. York 2,p. 248, t. 4,) but is 

 quite distinct from both. , 



SALICACE^. 



Q 1 . 



Gil ^ ^^' . ^eral narrow leaved willows were found along the 

 fruct'f?'^ • ^" the region west of the Colorado, but being without 

 food f *^^°^ they cannot be determined. One of them is used as 



tor cattle when there is no grass. 



PLATANACE.5:. 



i> ^^^fJf^ Mexicanus, Moricand pi. nouv. ou rars d'jimer. t. 26. 



Y*all ''r'*^,*^"^' ^^nth. hot. Sulpk.yp. 54. P. racemosus, JTuft.? 

 valley of the Gila. r y^ j 



