I 



Volume 22 



Part i 



r ■ 



North American Flora 



/ 



ROSALES 



John Kunkei. SmaIvI, 



PODOSTEMONACEAE 



J 



Gkorge Vai^kntink Nash 



CRASSULACEAE 



r 



Nathaniki* I/ORd Britton, Joseph Nklson Rose 



PENTHORACEAE, PARNASSIACEAE 



Per Axel Rydberg - 



'j 



PUBLISHED BY 



THE NEW YORK BOTANICAL GARDEN 



May 22, 1905 



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