OF THE PISTILS. 



69 



Fig. 

 Fig. 

 united 

 Fig. 

 Fig. 

 Fig. 



211 212 213 



208. Simple pistil of Larkspur. 



209. The five simple pistils of Columbine, all distinct. 



210. The three pistils of a St. Johnswort, — ovaries united but styles distinct. 



211. Compound pistil ©f another St. Johnswort, the three pistils entirely 



212. Flax, — the five ovaries united but the styles distinct. 



213. Pink, — the two ovaries united, styles distinct. 



214. Saxifrage, — the two pistils slightly united. 



together, forming a monopetaloiis corolla, so the pistils may 

 combine into a compound jpistll. The parts of such a pistil 

 are conveniently called carpels. 



125. As to the extent of this union of the pistils, it is found 

 in all possible degrees, always beginning at base and pro- 

 ceeding upwards. For example, in Columbine (Fig. 209), 

 the iiv^e carpels (pistils) are entirely distinct; in Early Saxi- 

 frage (Fig. 21-i), the two carpels are united at the base; in 

 Pink (Fig. 213), the two unite to the top of the ovary, leav- 

 ing the styles distinct ; so also in Flax (Fig. 212) ; in Even- 

 ing Primrose, the four pistils cohere to the top of the style, 

 leaving the stigmas distinct ; and finally, in the Lily, the 

 three carpels are united throughout. (See Figs. 209-21-1.) 



12G. AVe may know^ the number of carpels in a compound 



125. As to the cohesion or union of pistils, — how is it in Columbine? iu 

 Pink? in Early Saxifrage f Evening Primrose? Lily? 



