INFLORESCENCE FINISHED. 



103 



LESSON XX. 



INrLOBESOENCE FINISHED. 



222. Head; Bread-fruit, Fig. 223. Composite heads. 224. 

 Leguminous heads. 225. Keduction, development. 226. Definite In- 

 florescence: 227. Cyme; 228. Euphorbia; 229. Eascicle ; 230. 

 Glomerule; 231. Verticillaster ; 282. Stone-erop; 233. Mixed In- 

 florescence. 



222. Indefinite Inflores- 

 cence continued. The re- 

 duction of the rachis has led. 

 us to the Head : here the 

 rachis is suppressed in length, 

 but dilated in breadth, and 

 bears sessile flowers, which 

 may be unisexual, bisexual, 

 polygamous. In the Bread- 

 fruit (Fig. 213) and Bois 

 d'arc the head contains fe- 

 male flowers only ; they are 

 seated on a globose receptacle 

 (the rachis dilated) ; and 

 their calyces become accres- 

 cent (increasing in size) and 

 fleshy, making the Bread- 

 fruit of the one, the Osage 

 Orange of the other. In the 

 Fig (Fig. 140) we see the 

 Bois d'arc Orange reversed ; 

 here the receptacle is fleshy, 

 "t <*. hollow, and lined with dicli- 

 nous (unisexual) flowera, 



Fig. 140.— Fig (ftais Carica) : a, !i, cf i 

 9 Ab. ; a and c X. 



both sexes in the 

 same head. The 

 Dorstenia (Fig. 141) 

 is, as it were, a fig 

 laid open ; its recep- 

 tacle is broad, flat, 

 with both sexes em- 

 bedded in its sur- 

 face. 



223. Composite 

 Heads characterize 

 and give name (Com- 

 positm) to the Sun- 

 flower Order. Each 

 head thousfh simu- ^^^' 1^^- — -^i receptacle of Dorstenia Contrayerva. B, sec- 

 lati'ng a single WonofsameX: ", ? Ab.; b, J fls. C, cf fl. still more X. 

 flower, is composed of many flowers, called _;?o?'eis. Each floret has its 



