7 6 



PART I. ORGANOGRAPHY. 



are called epigynous. See Figs. 227, 228 and 229. In the ma- 

 jority of cases where the corolla is gamopetalous, the stamens 

 are inserted on its tube, as in the Phlox ; they are then described 

 c d c c d c c d c 



Fig. 227. 



Fig. 228. 



Fig. 229. 



Fig. 227. — Diagram of flower showing hypogynous calyx, corolla and stamens. 

 Fig. 228. — Diagram of flower showing perigynous corolla and stamens. 

 Fig. 229. — Diagram of flower showing epigynous calyx, corolla and stamens. In each 

 of these three figures, a represents the calyx ; b, the corolla ; c, a stamen ; and d, the pistil. 



as epipetalous. Sometimes they are inserted on or grow fast to 

 the pistils, as in the Orchidacese, Fig. 230, when they are called 

 gynandrous. 



Very commonly, stamens may become more or less united 

 with each other. This union may take place by the filaments, 



Fig. 230. 



Fig. 231. 



Fig. 232. 



Fig. 233. 



Fig. 234. 



Fig. 230. — Gynandrous stamens of the Lady's-slipper, one of the Orchidacea?; s, rep- 

 resents the stigma, and it a', the anthers; they are grown together. 



Fig. 231. — Monadelphous stamens of the Mallow; j, the stigmas, and a, the anthers. 



Fig. 232. — Diadelphous stamens of the Pea. In this flower, one stamen stands by 

 itself, while the other nine are united by their filaments. 



Fig 233. — Polyadelphous stamens of the Orange. 



Fig. 234. — Syngenesious stamens of the Dandelion; a, the anthers, and it, the stigma. 

 % 



or by the anthers, or by both. By their filaments they may be 

 united into one or into more than one set. When in one set, as 

 in the Mallow, Fig. 231, they are called monadelphous ; when in 

 two sets, as in the Pea, Fig. 232, they are termed diadelphous ; 



