PARRY — PHYSIOGRAPHY OP ROCKY BITS. 285 



glossy, deep green, and furrowed, especially towards the 

 top;" dry, it is 1\ inches long, and 1^ inches in diameter. 



The flowers of Dr. Parry's plant are more highly colored 

 than that of Dr. Hayden's, and may preserve the name of 

 var. pictum, which the discoverer has applied to the species ; 

 it seems to bear the same relation to the duller colored north- 

 ern form that JST. luteum, var. rubro-petalum (Caspary in 

 Schriften der phys. cekon. Gesellsch. zu Kcenigsberg, vol. 2, 

 1861, tab. 1), does to the common European plant; in that 

 variety the stamens as well as the disc are yellow, like the 

 sepals, only the petals, and especially their upper surface, are 

 " brown blood-red." On page 50, Prof. Caspary alludes to 

 our JV. adve?ia as being more frequently found with red 

 petals and points of stamens, than with yellow ones, a fact 

 which will be new to many of our botanists, as, at least in the 

 Western and South-western States, a red tinge has not 

 been observed by them.* 



II. 



ALTITUDE OF LONG'S PEAK, AND OTHER POINTS IN 

 COLORADO. 



Dr. Parry has, in his recent expedition, continued the 

 barometrical measurements commenced two years before, 

 the results of which were published, p. 131 et seq. of this 

 volume. I have calculated the altitudes, from his observa- 

 tions, in the manner detailed, p. 127, and, where the results 

 of both years disagreed, have assumed the mean of both as 

 nearest the truth, provided the different sets of observations 

 were equally trustworthy. A number of new stations have 

 also been added to the list. Thus, the following little table 

 was obtained, which may serve as an addition and emenda- 

 tion of the former one. 



It is due to Mi-. L. Blodget to state, that in the United 

 States Agricultural Report for 1853, pp. 429 and 431, he 

 had already stated the fact, more prominently brought for- 

 ward by Dr. Parry's observations, that the limits of cul- 

 tivation and of forest growth, on the western plateau, 

 is elevated far beyond what we would be led to expect 

 from the effects of latitude and altitude combined, hi his 

 Climatology of the United States, published 1857, the 

 same fact is incidentally alluded to. 



1. Western Plains. feet. 



Omaha (Library in State House) 1,211 



Denver City 5Jo 17 



2. Base of Mountains. 

 Franklin (St. Vrain's) 6,256 



* After this was written, I received from Prof. A. Gray a specimen of Nuphar advena 

 found in Massachusetts, with a brownish-red tinge on the outer, and a red blush on the 

 inner sepals red-tipped petals and reddish ovary and stigmatic disc ; the outer stamens 

 only showed a slight red tinge just below the polliniferous part. 



