246 THE FLOWER. 



be parted (that is, the component parts not united) quite or 

 nearly down to the tube or base, as in Fig. 472, 475 ; or less so, 



as in Fig. 473, 476 (with limb 

 5-lobed) ; or with merely angles 

 or points to represent the tips 

 of the component members, as in 

 Fig. 474 ; or with even and entire 

 border, as in common Morning- 

 Glory, Fig. 482. 



447. The line, or sometimes a manifest or conspicuous portion, 

 between the limb and tube (in the corolla always a portion above 

 or at the insertion of the stamens, when these are borne by the 

 corolla) is called the THROAT, in Latin FAUX, pi. fauces. This 

 is mostly more open than the tube, yet less expanded than the 

 limb ; but it often presents insensible gradations from the one to 

 the other. 



448. Such appendages as the CORONA or CROWN (385, shown 

 in Fig. 403, 404, 471) usually belong to the throat of a gamo- 

 petalous corolla or perianth, as in Oleander, Comfrey, Borrage, 

 Narcissus, &c., or to a corresponding position when the parts 

 are not coalescent. 



449. Forms of Corolla, Calyx, &c. As to terminology, some 

 of these are special and are applicable to corolla only, as the 



Papilionaceous, the peculiar irregular corolla of the tj'pical 

 portion of Leguminosae (388, Fig. 342-334), which has been 

 already illustrated, and in which the petals, two pairs and an 

 odd one, take particular names. Also the 



Caryophyllaceous, or Pink-flower (Fig. 471), a regular corolla, 

 of five long-clawed (unguiculate) petals, the claws enclosed in a 

 tubular calyx and the blades spreading ; and the 



Cruciferous, of four somewhat similar petals, the four abruptly 

 spreading blades in the form of a cross (cruciate), as in Fig. 394. 



Rosaceous, with roundish and widely spreading petals on very 

 short or hardly any claws, as in Rose and Apple-blossoms. 



Liliaceous, a 6-plryllous perianth of campanulate or funnelform 

 shape ; the members either distinct, as in most common lilies and 

 tulips, or gamophyllous, as in Lily of the Valley. All but the 

 first and last of these sorts are examples of regular and chori- 

 petalous perianth. 



Orchidaceous flowers are of a peculiar irregularity, combining 

 both calyx and corolla : one member, the petal in front of the 



FIG. 475. Rotate or wheel-shaped and five-parted corolla of the Bittersweet (So- 

 lan um Dulcamara). 



FIG. 476. Wheel-shaped and five-lobed corolla of the common Potato. 



