ZUNI AND COLORADO RIVERS. 171 



EUPHORBIACEiE. 



Hendecandra Texensis, Klotzch, in Erich. Arch. (1841) 1. p. 252. H. multi- 

 flora, Torr. in Frem. 1st report. Croton muricatum, Nutt. in Trans. Amer. 

 Phil. Soc. (n. ser.) 5, p. 173. Ojo Pescadi, head of the Rio Zuni; August. 



Euphorbia maculata, Linn.; Gray, Bot. N. St., p. 406. Rio Laguna; August. 



E. herniarioides, Nutt. 1. c: Engelm. and Gray, PI. Lindh. 1, p. 52. Little 

 Colorado ; October. 



JUGLAND^.CEJE. 



Juglans rupestris, Engelm. (mss.): foliis numerosis, (17-23,) lanceolatis apice 

 attenuatis, basi obliquis inequalibus subfalcatis margins integris vel remote den- 

 ticulatis petiolisque minute pubescentibus ; fructibus globosis compressiusculis 

 glanduloso-pubescentibus; nuce longitudinaliter sulcato; putamine creberrimo. 

 New Mexico, in various places, commonly in stony places. Also found in 

 western Texas. 



This species is usually a shrub 8-12 feet high, but, in favorable situations, 

 sometimes rising to thirty feet. Leaves a foot or more long; leaflets 2-3 inches 

 long, and 6 to 8 lines wide, often perfectly entire; fruit about the size of a mus- 

 ket-ball, usually depressed, globose, the pulp thin; nut about 6 lines in diame- 

 ter, rather deeply sulcate, the sulcas simple or forked; shell remarkably thick, 

 so that the kernel is scarcely larger than a pea. 



I first received specimens of this plant from Dr. J. M. Bigelow, when he was 

 attached, as botanist, to the Mexican Boundary Commission, in 1850. He 

 thought it was probably a new species, and wished me, in case it should prove 

 to be undescribed, to name it J. Whippleana , in compliment to Lieut. Whipple, 

 who was also a member of the Boundary Commission. Accordingly I read an 

 account of it, under this name, before the American Scientific Association, in 

 August, 1851; but the description was not published. Afterwards I was informed 

 that Dr. Engelmann had obtained the plant before me, and had already named 

 it J. rupestris, which name is therefore adopted. Last year I received from Dr. 

 Woodhouse, and also from Dr. Bigelow, specimens of what I at first took for a 

 second new species of Juglans, very near J. rupestris, but with broader and more 

 closely serrated leaflets, with fruit three times larger, as well as less strongly 

 sulcate, and the shell is proportionably thinner. It was figured and engraved 

 before I began to doubt whether it was a distinct species. For the present it 

 may be noticed as a variety, thus: 



major; foliis oblong-lanceolatis; fructibus subovato-globosis apiculatis levi- 

 ter sulcatis. 



Dr. Woodhouse found the plant in western New Mexico, and Dr. Bigelow 

 collected it at the Copper Mines. 



