276 



Tllli ILOWER. 



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

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

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

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

 a corolla of two petals is dipetahus ; of three, tripetalous ; of four, 

 tetrapetalous ; of Ave, pentapetalous ; of six, hexapetalous ; of seven, 

 heptapetalous ; of eight, octopetaloits ; of nine, enneapetalous ; of ten, 

 decapetalous. 



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

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

 called the claw (imcfuis) ; and hence the petal is said to be unguicic- 

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

 432), and Gj'nandropsis (Fig. 433), &c. ; the expanded portion, like 

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

 or hlade. 



509. Some kinds of polypetalous flowers receive particular names, 

 from the form or ai'rangement 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 

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

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

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

 spread towards then- summits ; the caryophyUaceous, 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 unguiculate petals. 



FIG. 450. Flower of Gilia or Ipomopsis coronopifolia ; 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 ; the petals a little farther united into a flve-lobed 

 spreading border. 



FIG. 462. Flower of the small Scarlet Morning-Glory, the five petals it k composed of per- 

 fectly uuited into a tnunpet-shapecl tube, and a uearly entire spreaUiug border. 



