222 Account of the Genus Dahlia. 



D. rose. Thouin, Ann. du Mus. vol. 3. 421. 

 Georgina rosea. Willdenow, Spec. PL vol. 3. 

 2124. 



D. rosea. Buonaiuti in Macd. Gard. Diet. 



vol. 2. pag. penult. 

 D. sphondyliifolia. Salisbury in Hort. Trans 



vol. 1. 91. 



Georgina variabilis a (lilacina). Willdenow, 



Hort. Berol. vol. 2. 94. 

 Emm. Hort. 



Bot. Berol. 899. 

 2. Dahlia frustranea caule pruinoso, flosculis radii neutris. 



Hortus Kewensis, Edit. 2. vol. 5. 88. 

 Georgina frustranea. De Candolle, Ann. du 



Mus. vol. 15, 310. 

 D. coccinea. Cavanilles, Icon. vol. 3. 33. 

 D. ponceau. Thouin, Ann. du Mus. vol. 3. 



422. 



Georgina coccinea. Willdenow, Spec. PL vol. 

 3. 2124. 



D. coccinea et crocata. Buonaiuti in Mac. 



Gard. Diet. vol. 2. pag. penult. 

 D. bidentifolia. Salisbury in Hort. Trans. 



vol. 1. 92. 



Georgina coccinea. Willdenow, Hort. Berol. 

 vol. 2. 96. 



Enum. Hort. 



Berol. 899. 



The names superflua and frustranea, by which the two spe- 

 cies are now distinguished, are terms designating that part of 

 the character of the plants, which depends on the fertility or 



