TOG 



THE FLOn'ER 



196. One-celled, with free central placenta. — The free central 

 pliii eiita of tlie Pink (compare Fig. liO) y have come about bj- the 

 dissepiments having been suppressed in growth. 

 Indeed, traces of tiie original partitions are often to 

 be detected. On the other 

 hand, it is equally supposable 



138. I'lat'entatiun 

 (if Farnas- 



l.'i'.). Placeutatidn 

 uf Drusera 

 iiUformis. 



140. Pistil of Sjifi-f/tduriu nihra^ 

 one of the Pink family, with 

 free central placentatien. 



that in the Primrose (Fig. l(io) the free central placenta has been 

 derived from parietal placentatioii liy the united carpels liearing ovules 

 only at the base. Xow, however, the placenta arises directly from the 

 end of the floral axis, not from the carpels. 



197. To I lie great majority of flowers with which one meets, one 

 or aiiotlier of the above types will apply. These types exhibit nmst 



cleai-ly the structural principles of the 

 piistil. Occasiomdly, sonn; different 

 mode of disposing the ovules or of 

 .separating the ovary into chaiuliers 

 will be discovered. 



198. Pistils of the Gymno- 

 sperms. — These are no distinct 

 and tlie group of plants vvhieli 

 pi-oduee tloeni is so important 

 tliat tliej^ need a separate de- 

 scription. 



199. Tlie fertile flowers of the 

 Pine ' and other trees of tlie 

 same g-nuip ap[icar in early spring- 

 as snndl rii/hly colored cones 

 ( fig. 141 ). Tlie scales are soft, 

 ;ind tliougli not vei-\- thin are 



341. The tlii'wer of a Gyiiiiio- 

 sppnii. ,\t the riitit a 

 siiiiiK.' carppllai}" scale 

 heariiii;- t w o ovules. 



' What is here dfsiuTiateil a single female flower is also spoken of as 



. ilitli ■resiN iiri;. 



