THE ANDECECIUM. 



57 



now called pollen, are ready to be conveyed to the stigma. The anther is rarely 

 sessile, i.e. without filament (Arum, fig. 293). 



When the corolla is monopetalous, the stamens almost invariably adhere to it 



293. Arum. Stamen (mag.) 



292. Stock. 

 Stamen. 



294. Belladonna. 

 Corolla and andrcecium laid open. 



295. Campanula. 

 Flower cut vertically. 



296. Ranunculus. 

 Pistil and stamens. 



(Belladonna, fig. 294) ; amongst the few exceptions are Heaths and Campanulas 

 (fig. 295). 



Insertion of the Stamens. This term relates to the position on the floral axis 

 which the stamens occupy relative to the other whorls. The insertion of the corolla 

 always coinciding with that of the stamens, in the staminiferous monopetalous 

 corolla the insertion of the stamens may be inferred from that of the corolla. Thus 

 the stamens, like the corolla, are hypogynous (st. hypogyna], when they do not adhere 

 to the pistil or calyx, but spring from the receptacle below the base of the pistil 

 (Ranunculus, fig. 296; Primrose, fig. 297); perigynous (st. peri- 

 gyna), when inserted on the calyx, rather above the base of the 

 pistil, to which they are relatively lateral (Apricot, fig. 298 ; 

 Campanula, fig. 295) ; epigynous (st. epigyna) when 

 A ^K inserted on the pistil itself (Coriander, fig. 299 ; 

 Madder, fig. 300). 



297. Primrose. 

 Flower cut vertically (mag.). 



300. Madder. 

 Flower cut vertically. 



298. Apricot. 

 Open flower. 



299. Coriander. 

 Flower cut vertically. 



The perigynous and epigynous insertions being easily confounded, the term 

 calyciftoral (pi. calyciflorce] has been given to all plants whose corolla (whether mono- 

 or poly-petalous) and stamens are inserted on the calyx, and this whether the calyx 

 be below the ovary (Apricot, fig. 298), or above it (Campanula, fig. 295 ; Coriander, 

 fig. 299; Madder, fig. 300). The term thalamiftoral (pi. thalamiflorce) has been given 

 to plants whose polypetalous corolla and stamens are inserted below the pistil, or 

 hypogynous ; and corollifloral to plants with a monopetalous stamiiiiferous corolla 

 inserted below the pistil, or hypogynous (Primrose, fig. 297). 



