INTRODUCTORY LESSONS. 



XXI 



. A Perfect Floimr may consist of pistils and stamens only, and of 

 tliese the stjdes and filaments are not essential. 



When sepals cohere or grow fast to 



Cohesion of Floral Organs. 

 each other (Figs. 48- 

 51) the calyx is Gamo- 

 sepalous. So, also, 

 the corolla may be 

 Gamopetalous. "When 

 stamens cohere they 

 are Monadeiplious if 

 in one set, Diadel- 

 plioiis if in two sets 

 (usually 9 and 1)' etc. 

 Cohering pistils (car- 

 pels) form a Com- 

 pound Fisiil. The de- 

 grees of cohesion in 

 calyx and corolla is 

 described, as in leaves, 

 b}^ the terms entire, 



Ctejt or tubed and 43. Bud of Eschseholtzia, with the mitriform calyx removed ard 

 varied Thus* Bind- ^'^o'^'*'^ ^^o^'®- 49. open flower of th^ same, with two of the petals 

 I ' ' removed, one of these below with the stimens adhering to the claw. 



weed (Fi^. 50) has an ^^* ^Ic^'^^andlt^af of convolvulus arvensls; above is the corolla split 

 ^ *^' ' ' down, displaying iive unequal stamens. 



entire corolla limb; Zauschneria (Fig. 51) 

 has a 4-lobed calyx; Nemophila has a 

 5-23arted or deeply 5-lobed corolla, etc. 

 If the flower has a limb (border) dis- 

 tinct from the tube, these terms aj^ply to 

 the limb. 



Adhesion of Floral Organs. The 

 cal^'x may grow fast to the ovary (Fig. 51), 

 then it is said to be Superior, (ovary in- 

 ferior). The corolla and stamens fre- 

 quently grow on the calj'x, as in Fuch- 

 sia, Strawberry, etc.; then tliev are said 



