\ 



A^I>I>EISrDIX M 



D 



S 



\\ 



of 



SxMXT Louis, Bcccmher 31, 18G0 

 time has prevented mo fully to elaborate the very 

 botanical material brought together, imder your orders, by my brother, TTenry E 

 mann, the geologist and meteorologist of your expedition. 



icl 



1 



I lierewith inclose to you an account of a few species, \vhich seem to have a par 



pi 



I 



() 



} 



1 hope to submit them, througli \ 



the. scientific public at a future period. 



Very respectfuly, &c., 



G 



Oapt. J. II. SiMPSox, 



TopograpMcal En[jinccrs^ TJ. S. A., Commauflhig Exprdlthm. 



TtOSACEZ!:. 



Cercocarpus ledtfolius, NiittaU in Torrcy and Grmjs FL K Am. 1, jd. 427; a: 

 ontinmfion of Mkhaux's Sylva, 2, p. 2S, t 51; Ilooher, i c. ^jI t 324; J/o© 



of the inliabitants of t 



:lescribed by Nuttall in "botl 



^ 



1 



'ks mentioned 



that not mil el 



1 



be ad 



His fignire, however, is not a yen 



sentation. lie says that it 



fc! 



like a Dcach-tree, at most 15 feet hiijh, and 



the trunk is sometimes as much as a foot in diamet 

 d to OTOw rarely as a tree, but usually branching fi 



On the exDcdit 



from one root; its heiffht was from 8-15 feet, and the stems seen had the thickness of 

 3-6, or, at most, 10 inclies. The bark is light gray, tough, smoothish, with superficial 



n 



ned 



I wrinkles and 



rht reddisli-]>r( 



with white 



P 



The wood is hard, heavy, verj 

 ledullary rays very numeroi 



but 



extremely fine, scarcely visible with the naked eye; 

 but harder and heavier. 



ood 



A specimen before me has a dl 



which 

 much 



rood, showinof 24 annual rincrs, so that each ring: has a thickness of 



4 



The shoots, or lono^er branches, have a white, smooth barl 



internodes of about 



1 



Tl 





