IX] SUPERIOR AND INFERIOR COROLLA 79 



There is one matter concerning the corolla more par- 

 ticularly than the calyx, however, which deserves special 

 consideration. 



In the case of hypogynous flowers each petal, or the 

 base of the gamopetalous corolla, springs from the floral 

 axis beneath the carpels or ovary, and whether the 

 stamens are similarly and separately inserted, or whether 

 they are borne on the corolla (epipetalous), we must 

 consider the ovary as superior e.g. 



Buttercup Barberry Mahonia 



Tamarisk Lime Maple 



Bittersweet Heath Ling 



Strawberry-tree Bearberry Azalea 

 Rhododendron, &c. 



In perigynous flowers the petals arise from the basal 

 part of the calyx, as in the 



Furze Whin Laburnum 



Robinia Holly Blackberry, &c. ; 



or from the throat of the calyx-tube as in the 



Cherry Plum Almond 



Bird-cherry Gean Roses 



Red Currants Black Currants Gooseberry 

 Buckthorn, &c., 



and the ovary is then generally half-inferior. 



In epigynous flowers the petals or corolla are inserted 

 on the closed throat of the calyx-tube, or on the top of the 

 inferior ovary, as in 



Ivy Cornel Honeysuckles 



Elder Snowberry Wayfaring Tree 



Guelder Rose Whortleberry Cowberry 

 Cranberry, &c. 



