Ao.i.j GRAY AND HOOKEB ON mi. ROCKY MOUNTAIN FLORA. 



AUai. Upine, 



D Alpine. 



Llpina. 



Juii< M 



amis. 













ndi. 



. 





Jodooi 



Jonciu caataneua. 

 Juncne chlorocepbalos. 







UUa. 



Carer sciipoidca. 



' 











t'arej I 





Caxt\ 



■ tt:i. 

 in.iirv.i. 



Brcweri. 





1 



'rata. 



1'iua. 



Ipina. 











[ frigid*. 







Carex fcetida. 







.a.i. 

 : Lgida. 



Lagopina. 















' 



podooarpa. 













I jilifolia. 







Ourex luzulfpfolia. 





Alop as. 





Fblr am ali»iaam. 



Phleam alpinam. 



Pblc-am alpinam. 



•ingii. 









Ili.r.M hloa .1' 





rum. 



Trisetum subspicatam. 



.?um. 











Poa laxa. 

 I'. '.1 arctic*. 





1 



Poa alpina. 



Poo alpina. 





01 rubra 



.1 brevifolia or rubra. 







ill sp. 



Tin- analysis of this alpine flora aeed oot detain as. The botanist 

 glance thai it is the arctic flora, or rather prolongations of i - . 

 tended southward along the mountains of sufficient elevation, with cer- 

 tain admixtures of types pertaining to the vegetation of the regions. 



The peculiar elements in the scanty alpine flora of the Eastern United 

 States are only five species, viz: < > Df arctic affinity, Calamagt 



it : ao orchid, HaJx naria obtusata .- a Qi uw, which has its princi- 

 pal borne on the snbalpine summits of the Alleghanies farther south, 

 and is aearrj represented by a species oe the Northern Pacific <■■ 

 and two species of HTabalu8 t which will be allowed to be altered stau 

 species peculiar to North America and oearly peculiar to the Atlantic 

 side. 



The Pacific alpine flora has a higher proportional Dumber of aon arctic 

 species, as must Deeds be, con-id. ring its long stretch through so many 

 parallels of latitude ; but the number pertaining to non-arctic £ 

 small. They are — 

 ' nia puynum. ' 



jynia pectinate, Aplopaj 'Hi. 



J | <■ ;•■ m, i specif-. 



All of them are of _• only 



Buliai to An 1 third and a qua 



