330 Plants of the Rocky Mountains — Supplement I. 



iition U2O3, CO2, in which state it exists, according toEbelmen, 

 n its double suits with the carbonates of potash and ammonia. 

 Ill conclusion, it will be observed that none of these carbon- 

 itescoiifonn to the theory of Berzelins, that the number of atoms 

 •f acid, in a neutral salt, corresponds to the number of atoms of 

 Lxygen in the base. On the contrary, their composition is gen- 

 rallv tlie same as that of the salts of the protoxyds, one atom 

 >f acid to one of base. 



Laboratory of the Lawrence Scientific School, Cambridge, July, 1862. 



Art. XXJX.—Supplements to the Enumeration of Plants of Dr. 



Cvllecii 



p. 261.) 



(contir 



Supplement l.— Comferce, by Drs. Parry and Engelmann. 



Dr. Parry collected too few specimens of the following 

 Coniferse for distribution, but as his notes are replete with inter- 

 est they are given here (under marks of quotation) together wiih 

 a few remarks of my own. g. E- 



Abies grandis, Lindl. Not common in this region, resembling much 

 the Eastern A. balsamea, Fendler's N. Mex. No. 828 is the same. 



Abies Douglasii, Lindl. "Abundant through the eastern mountain 

 district, except on the higher elevations. A veiv sightly tree, of the 

 average height of 80 feet, with a graceful oval outline; the spreading 

 branches curving upwards at the extremities. Wood of slow growth, but 

 very mditferent, inclined to warp and crack, turning reddi.^i-l'rown 'J 

 drying." This species, as well as the nearly allied A. Canadensis, is well 

 distinguished from all our other Pines by the distinctly petioled leaves. 

 Fendler's N. Mex. No. 829. 



Abies Menziesii, Lindl. "A finely shaped tree, though of ratlj'-r - 

 outline, of rapid growth ; wood very compact, hut rather coarse u- 

 and pitchy; tlie lugs taper too rapully to saw up to advantage." ' 

 pendulous from tlie end of the branches. Leaves stouter than ii 

 other alhed species, stiff 



acterized by the .'-lender and 



Probably the same as the northe 



from Canada to the norllrern liockv Mountains, where it has been ^f^' 

 ered by Bourgeau ; but it has not' fallen under Dr. Parry's or Dr. Hay; 

 den's observation, on the headwaters of the Kettle, Colorado, Mis^."" 



