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THE BOOK OF EVEKGEEENS. 



thick, ligneous, obtuse, loose, squarrose, lowest sterile ones 

 recurved, yellowish-brown color. Seeds, rather large, ir- 

 regularly ovate or obovate, with persistent, sharp, keeled 

 margins, representing minute wings. Cotyledons, 8 or 9. 

 This species, the identity of which has been questioned 



for the last forty 

 years, is now happily 

 assigned the position 

 that its discoverer 

 claimed for it. This 

 question has been 

 satisfactorily solved 

 by the researches of 

 Dr. Parry, who had 

 excellent opportuni- 

 ties of examining 

 specimens, and was 

 enabled to correct 

 a few inaccuracies 

 that occurred in pre- 

 vious descriptions. 

 It was discovered 

 by Dr. James on the 

 Rocky * Mountains, 

 growing mostly on 

 the sub-alpine tracts, 

 and extending al- 

 most to the utmost 

 limits of vegetation. 

 Mr. H. Engelmann 

 collected it on the 

 head waters of the Platte, and it has been noticed by 

 several other explorers. Dr. Parry, in his Ascent of Pike's 

 Peak, remarks that " the vertical range of this species, as 

 observed between latitude 38 and 40 W., is from 7,000 

 to 11,000 feet above the sea. It rarely occurs in large 



r. 18. PINUS PLEXILIS, FROM A ROCKY 

 MOUNTAIN SPECIMEN, COLLECTED BY 

 DOCT. PARRY. 



