RUDBECK^IA COLUMNA'RIS. 
COLUMNAR RUDBECKIA. 
Class. Order. 
SVNGENESIA. FRUSTRANEA. 
Natural Order. 
COMPOSITE. 
Native of 
Height. 
Flowers in 
Duration. 
Introduced 
N. America. 
3 feet. 
Aug. Sept. 
Perennial. 
in 1811. 
No. 336. 
Rudbeckia, from Rudbeck, the name of two cele- 
brated Swedish botanists. Columnaris, from the cy- 
lindrical or columnar receptacle of the flower. 
Through the nicer distinctions made by recent 
botanists, the old genus, Rudbeckia, has suffered a 
’ little amputation. Out of its severed members, two 
genera have been established by Mr. D. Don. The 
one Echinacea, the other Centrocarpha, leaving Rud- 
beckia restricted to such species only as have divided 
leaves and elongated cylindrical receptacles. 
As no generally acknowledged specific rules are 
laid down, by which to restrict the botanist in his 
subdivision of groups of plants, to form genera, the 
natural consequence is, that as science progresses, as 
men acquire greater botanical penetration, so will 
the division of received groups be continued. It 
will prevail partly from an impression of benefit ren- 
dered to science, and partly from the pride of acute 
discrimination. 
The Rudbeckia columnaris does not increase so 
freely at the root as some others, but will admit of 
separation every second year. A light loamy soil is 
congenial to its growth. 
London’s Ency .of Plants, sp. 12462. 
