27G 



THE FLOWER. 



tion.s in the latter case form the tube of the corolla; the distinct parts 

 are the lobes, 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 dipetalous ; of three, tripetalous ; of four, 

 tctrapetalous ; of five, ])entapetalous ; of six, /texapetalous ; of seven, 

 Iteptapetalous ; of eight, octopetalous ; of nine, enncapctulous ; often, 

 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 data {unguis) ; and hence the petal is said to be unguicu- 

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

 432), and Gynandropsis (Fig. 433), &c; the expanded portion, like 

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

 or blade. 



509. Some kinds of polypetalous flowers receive particular 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 

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

 Roe, 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 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 unglticttlate petals. 



FIG 450. Flower of Cilia or Ipomops is coror.opifolia , 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 five-lobed 

 spreading border 



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

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



