130 



AMERICAN CARNATION CtJl/TtJRE. 



therm. This fact is abundantly proven by one hundred carnations 

 that have been imported from Europe and as many from Califor- 

 nia, very few from either source having appeared on the recom- 

 mended list the second time. Sievers of California is credited 

 with the origin of Ethel Crocker, but it was not grown from Cali- 

 fornia .seed, and Siever's glass treatment of carnations at San Fran- 

 cisco tends to normalize their nature to the requirements of the 50- 

 degree isotherm. 



A higher mean annual temperature by greenhouse methods 

 may, if it has not already done so, evolve a new species of carna- 

 tion adapted to a higher artificial or natural isotherm than* 50 de- 

 grees. See chapter on a new species of carnation. 



A TYPE OF CARNATION WITH SERRATED PETALS. 



