56 



PRINCIPLES OF PLANT-TERATOLOGY. 



Conclusions on Fasciation. — Having already fully 

 discussed the subject of " fasciation," much more need 

 not here be added. What remains still to be said 

 has reference to a question of terminology. Having 

 reached the conclusion that " fasciation " really repre- 

 sents a division and not a fusion, it becomes impos- 

 sible to accede to the old-fashioned view of classing all 

 these cases under " synanthy " or " syncarpy," for 

 these terms denote that the phenomenon is always 

 due to fusion. It is quite likely that some cases of 

 polymery in flowers are due to synanthy ; but evidence 

 of this can only be forthcoming when it is shown that 

 the phyllotaxy on the stem is disturbed and that 

 thereby flowers have actually become approximated 

 and fused. There is no evidence that this was so with 

 any of the flowers above described. Fasciation in all 

 these cases, as in that of a fasciated stem, must be due 

 to extension and subdivision of a single individual. 



BIBLIOGRAPHY. 



Anon. — "An Abnormal Sweet Pea." Grard. Chron., ser. 3, 



vol. i (1911), p. 192. 

 Atwell, C. B. — " Abnormality in Lilium philadelphicum." 



Torreya, vol. xv (1915), pp. 231-232. 

 Beuckman. — " Fasciations in Arissema, Rudbeckia, and Viola" 



Torreya, vol. vi (1906), pp. 193-195. 

 Beuhin. — " Teratologisehe Beit rage." Verhandl. zool.-bot. 



Ges. Wien, Bd. xvii (1867), pp. 94-98 [Bellisj. 

 Camus. — "Anomalie e varieta nella Flora del Modenese." 



Rendicont. Soc. Nat. Moclena, ser. 3, vol. ii (1881), 



p. 136 [Bellis]. 



Log. cit., ser. 3, vol. iii (1886), p. 79 [Bellis]. 



Costerus. — "Raspberries on a bifurcate thalamus." Rec. 



Trav. bot. Neerl , vol. vi (1909), pp. 63-66. 

 Cotjlon. — l( Un grain de raisin monstrueux." Trib. Hort., 



no. 75 (1907), p. 717 [grape]. 

 GtEREmicca. — " Sopra un fatto teratologico che illustra Tor- 



dinamento della cariossidi nella spiga di Zea Mais." 



Boll. Soc. natural, Napoli, ser. 1, vol. xx (1907), pp. 



125-131. 



