OF ARTS AND SCIENCES. 45 



rima a connectivo parum remota ; squamis caulinis angusto-oblongis 

 acutiusculis m;igis fimbriato-erosis. — 'Humboldt Co., California, V. 

 Rattan. Ten or twelve miles east of the station of the preceding 

 species, and at least a thousand feet higher, associated with Boschniatia 

 ttrubilacea and Allotropa virgata. Washington Territory, George 

 Gibbs. In the earlier state the plant bears a singular resemblance to 

 Pleuricospora Jim briolata* 



Ranunculus Macauleti. E grege R. nivalis; foliis diversissi 

 mis. nempe omnibus integris lingulatis, apice truncato tridentato, 

 radicalibus (pristinis oblongis) in petiolum attenuatis, cauliuis sessili- 

 bus ; sepalis extus nigricanti-villosissimis ; petalis aureis ; carpellis in 

 stylum brevem snbnlatnm attenuatis. — Rocky Mountains in San 

 .luan Co., Colorado, Lieut. C. II. McCauley, U. 8. A., Mr. F. N. 

 Pease. Lieut. McCauley collected two specimens of this most distinct 

 species in the summer of 1877, but with only the blossom and upper 

 leaves. The flowers so exactly resembled those of R. nivalis in the 

 typical arctic-alpine form and with very dark villous calyx, that I 

 entered it under that name in the catalogue of the plants of his col- 

 lection, just now published by the Engineer Department in the report 

 of an official exploration of the region. But Mr. Allen of Yale College 

 now sends us two complete specimens, showing the remarkable foliage. 

 These were collected ''about Crystal Lake, San Juan Co., at 11,700 

 feet of elevation, July 8, 1878," by his correspondent F. N. Pease. All 

 that is now wanted is the fruit, which we trust Mr. Pease will sup- 

 ply. From the blossom it may be conjectured that the head of mature 

 carpels may be oblong ; and these are more gradually attenuated into 

 a shorter style than in R. nivalis. The petals in the specimens are 

 light yellow. Lieut. McCauley displayed such zeal and activity in 

 making a botanical collection under many difficulties, and is likely in 

 future explorations to turn his experience to such good account for 

 our science, that it is with much pleasure that I avail myself of the 

 opportunity now afforded to name this species in honor of its first 

 discoverer. 



Cardaminb Clematitis, Shuttleworth in coll. distrib. Rugel. 

 Spec, distinctissima, glaberrima, semi-subpedalis e rhizomate tenero ; 

 foliis radicalibus primariis rcniformibus subintegris, coeteris trisectis 

 (segmenlis rotundatis nunc angulaiis, terminali majori reniformi- 

 cordato seu angulato-trilobo) vel supremis oblongatis trilobis, petiolo 



* Doschniakia strobilacea, Gray, was abundantly found by Mr. Rattan in the 

 same district. The seeds have a deeply favose coat. 



