144 



PARTICULAR FORMS OF FLOWERS 



carpels may follow the rule. Flowers on 

 the plan of 5 are said to be pentamerous; 

 those on the plan of 3 are trimerous 

 (merous is from Greek, signifying "mem- 

 ber"). In descriptive botanies 

 these words are often written 

 5-merous and 3-merous. 



292. The corolla often as- 

 sumes very definite or distinct 

 forms when gamopetalous. It 

 may have a long tube with a 

 wide-flaring limb, when it is 

 said to be funnelform, as in 

 morning-glory (Fig. 240) and pumpkin. If the tube is 

 very narrow and the limb stands at right angles to it, the 



242. Rotate flowers oi potato. 



corolla is saberform, as in phlox. (Fig. 241.) 

 very short and the limb wide-spreading and 

 nearly circular in outline, the corolla is rotate 

 or wheel-shaped, as in potato. (Fig. 242.) 



293. A gamopetalous corolla or gamo- 

 sepalous calyx is often cleft in such way as to 

 make two prominent parts. Such parts are 

 said to be lipped or labiate. Each of the lips 

 or lobes may be notched or toothed. In 5- 

 merous flowers, the lower lip is usually 3-lobed 

 and the upper one 2-lobed. Labiate flowers 

 are characteristic of the mint family (Fig. 

 213), and the family therefore is called the 

 Labiatse. (Properly, labiate means merely 

 lipped, without specifying the number of lips 

 or lobes; but it is commonly used to designate 

 2-lipped flowers.) Strongly 2-parted poly- 

 petalous flowers may be said to be labiate; 

 but the term is oftenest used for gamopeta- 

 lous corollas. 



If the tube is 



243. 



Personate flowers 

 of snapdragon. 



