OR, PLAIN TEACHING. 



291 



721. 



form of the 

 edges may 

 be con- 

 trasted 

 with the 

 irregular 

 form of the 

 edges in 

 l other flow- 

 ers of the 

 same shape, 

 10. Then 

 there is the flattened rotate, or 

 wheel-shaped corolla, 



11, of which an ex- 

 ample is afforded by 

 the pretty little flower, 

 the "forget-me-not" 

 The salver-shaped co- 

 rolla, 12, presents 



spreading head 

 surmounting a 

 very length- 

 ened tube. 

 Although there 

 appears to be 

 five petals in 

 this example, 

 it is really a 

 mono - petalous 

 flower, as will be found by exa- 

 mining the favourite primrose, 



12, the whole of the corolla being 

 formed of one flower-leaf. 



The funnel-shaped corolla, 13, 

 differs from the 13 

 salver shaped, 

 chiefly in hav- 

 ing the tube 

 expanded at 

 its free part. 

 The labrate, or 

 lipped, corolla, 724. 

 10, has its opening extremity 

 divided into two parts, resembling 

 lip?. In other kinds these lips 



723. 



are thrown apart, and then they 

 are called ringent, or spreading, 

 14 ; and when the upper lip is 

 15 



725. 



hollowed and expanded, as in the 

 monkshood, it is called helmet- 

 shaped, 15. 



The forms of poly -petalous, or 

 many-petaled corollas, are less 

 varied than the mono -petalous, or 

 one-petaled, already described. 

 Of these, the cruciate corolla, 

 16, is divided 

 into four parts, 

 like a Maltese 

 cross. A flower 

 is said to be 

 cruciate when 

 four equal pe- 

 tals are placed 

 opposite to 

 726. each other at 



right angles. The flower of the 

 pea, 17, present an example of a 

 very curious corolla. It consists 

 of five petals, 

 four of which 

 are arranged in 

 pairs, and one 

 singly. The 

 pairs form the 19 

 carina, or heel, 

 18, and the alo3, 

 or wings, 19, 

 which lie on 



