THE FLOWER 267 
In form, the calyx may be regular or irregular; regular, if its 
parts are evenly developed, and irregular if its parts differ in size 
and shape. The more common forms are tubular, resembling a 
tube; rotate, or wheel-shape; campanulate, or bell-shaped; urceolate 
Fic. 183. “Fic. 184. Fic. 185. 
Fic. 183.—Campanulate calyx, surrounded by an epicalyx, of the Rose of 
Sharon (Hibiscus). 
Fic. 184.—Perigynous and chorisepalous calyx (cf) of Rose with concave 
receptacular tube (ct) with stamens (e) inserted perigynously on its edge. 
Fic. 185.—Persistente pigynous calyx (c) of the Quince (Cydonia), showing the 
receptacular tube completely enveloping the matured carpels. (After Small.) 
Fic. 186. Fic. 187. Fic. 188. 
Fic. 186.—Caducous hairy calyx of the Poppy (Papaver). 
Fic. 187.—Globose persistent calyx of Winter Cherry (Physalis). 
Fic. 188.—Perigynous chorisepalous calyx of Indian Cress (Tropa@olum) with 
spurred receptacular cup. (After Small.) 
or urn-shape; hypocrateriform, or salver-shape; bilabiate, or two- 
lipped; corresponding to the different forms of corolla, under 
which examples illustrating each will be given. 
The calyx usually remains after the corolla and stamens have 
fallen, sometimes even until the fruit matures, as in the Night- 
