7G 



ORGANOGEAPHY AND GLOSSOLOGY. 



membrane, and turned inside out, the sepals would then form a ring round the 

 mouth of a sort of bottle, represented by the inverted receptacle, whose throat would 

 be occupied by the stamens and petals, and its inner surface by the ovaries ; and the 

 strawberry would be thus changed into a rose. The last evidence of the hollow body 

 of the rose being a cup-shaped expansion of the axis rests on the cases in which the 

 receptacle forms, instead of a cup, a central convex projection, which bears carpels ; 

 the rose thus being converted into a strawberry. 



In all these cases the plant is calvcifloral ; the stamens and petals are not 

 hypogynous, as in the Lychnis (fig. 380) and Primrose (fig. 297), but are inserted above 

 the base of the pistil, at the distal end of the torus (Sumach, fig. 450), or on the 

 outer circumference of a ring or cup formed by the 

 torus (Circcna, fig. 450 bis ; AlchemilJa, fig. 451); 

 they are thus either perigynous or epigynous, accord- 



461. Alchemilla. 

 Flower cut vertically (mag.). 



45O. Sumach. 

 Flower cut vertically (mag.). 



432. Nnatnrtlinn. 

 Flower cut vertically. 



ing to their insertion around (fig. 450) or above the ovary (fig. 450 bis). When 

 the torus both spreads over the base of the calyx and around that of the ovary, the 

 androecium may be hypogynous, and the corolla peri- 

 yynous ; this is very rare, but occurs in Tropatolum (fig. 

 452). 



The term disk has been reserved for the tumid 

 ring which, in hypogynous flowers, surrounds the base 



4.V Inn Circwa. 453. Radish. 

 Flower cnt Pistil 



vertically. and nectaries. 



4S5. Sedum. 



Pistil and 



nectaries (mag.). 



457. P.M in.--iii. 



Petal 

 and nectaries. 



456. Fritjllary. 



Stamen, 

 petal and nectary. 



454. Periwinkle. 



Pistil 

 and nectai ies. 



of the ovary (Orange, fig. 445) ; and for the thickening which crowns the inferior 

 ovary, enclosing the. base of the style (Circcea, fig. 450 bis). These thickenings of 



