276 



TUE I'LOAVER. 



tions in the latter case form the tube of the corolla ; the tlistinct parts 

 are tlie lohes, segments, «&;c. ; and the orifice is called the throat, 

 just as in tlie calyx. The number of parts that compose the corolla 

 is designated in the manner already mentioned for tlie calyx ; viz. 

 a corolla of two petals is dipetalous ; of three, tripetaloiis ; of four, 

 tetrapetalous ; o( ^vc, pentapetalous ; of a'lx, kexapetcdous ; of seven, 

 heptapetcdous ; of eight, octopetalous ; of nine, enneapetalous ; of ten, 

 decapetalous. 



508. Frequently the petals (and rarely the sepals) taper into a 

 stalk or naiTow base, analogous to the petiole of a leaf, which is 

 called the claw (iinguis) ; and hence the petal is said to be vnguicu- 

 late ; as in Cruciferous flowers (Fig. 405), the Pink family (Fig. 

 432), and Gynandropsis (Fig. 433), &c.; tlie exjianded portion, like 

 that of tlie leaf, being distinguished by the name of the lamina, limb, 

 or blade. 



509. Some kinds of polypetalous flowers receive })articiilar names, 

 from the form or arrangement of their floral envelopes, especially of 

 the corolla. They may be divided into the regular and the irregular, 

 — terms which have already been defined (446, 471), Among the 

 regidar forms we may mention the rosaceous flower, like that of the 

 Rose, Apple, &c., where the five spreading petals have no claws, or 

 very short ones ; the liliaceous, of wliich the Lily is the type, where 

 the claws or base of the petals or sepals are erect, and gradually 

 spread toAvards their summits ; the caryophyllaceous, as in the Pink 

 and its allies (Fig. 449), where the five petals have long and narrow 



FIG. 449. Corolla of Soapwort, of five separate, long-clawed or unginculnte. petals. 



FIG. 450. Flower of Gilia or Ipomopsis coronopifolia j the parts answering to the claws of 

 the petals of the last figure here all united into a tube. 



FIG. 451. Flower of the Cypress-Vine j the petals a little farther united into a five-lobed 

 spreading border. 



FIG. 452. Flower of the small Scarlet Morning-Glory, the five iietals it is composed of per- 

 fectly united into a trumpet-shaped tube, and a nearly entire spreading border. 



