120 PEINOIPLBS OF PLANT-TERATOLOGY. 



Pfefpee. — "Zur Bliithenentwickelung der Primulaoeen und 



Ampelideen." Pringsh. Jahrb. Wiss. Bot., Bd. viii 



(1872), pp. 194-215, pis. xix-xxii. 

 Planchon. — Bull. Soc. bot. Fr., tome xiii (1866), pp. 234- 



235 [Quince]. 

 RoLFE. — " A Morphological and Systematic Eeview of the 



Apostasiese." Journ. Liim. Soc, vol. xxv (1890), pp. 



211-243, pi. xlviii. 

 " The Cypripedium Group." Orch. Rev., vol. iv 



(1896), pp. 327-334,- 363-368. 

 ScHiMPEB, 0. — Correspondenz. Flora, Jahrg. xii (1829), 



p. 443 \_Pseonia] . 

 ScHMiTZ.— "Zur Deutung der Euphorbia-Bliithe." Flora, 



Jahrg. liv (1871), pp. 417-422, 433-443, pi. iv [2 whorls 



of carpels]. 

 Spinnbe. — " Sur des f luits anormaux de Cheiranthus." 



Bull. Soc. Neuchat. Sc. nat., tome xxxii (1905), pp. 



140-146. 

 VELENOVSKr. — Die Vergieichende Morphologie der Pflaiizen, 



Tfil iii, p. 998. Prag, 1909. [Epilobium.'] 



Addendum to Fasciation, p. 47. 



In a fasciated flower of the common buttercup 

 {Ranuiicnlus acer) seated at the apex of a fasciated 

 peduncle, one side was very much more advanced in 

 development than the other, having large green ovaries 

 around which all the stamens, petals, and sepals had 

 fallen off, while on the opposite side all these members 

 were present, and no trace of the pistil could be seen 

 except in microscopic section, which revealed its very 

 I'udimentary state of development. This phenomenon 

 was due to the unequal growth on either side of the 

 peduncle, and consequently of the flower, and is, as 

 described in Vol. I, a common accompaniment of 

 fasciation. 



