INTRODUCTORY LESSONS. 



XXi 



A Perfect Floicer may consist of x^istils and stamens only, and of 

 these the styles and filaments are not essential. 



Cohesion of Floral Organs. When sepals cohere or grow fast to 

 each other (Figs. 48- 



51) the calyxis 6^a?7io- T ^^_ _^ k ^ 



sepalous. So, also, 

 the corolla may be 

 Gamopetalous. When 

 stamens cohere they 

 are Monadetplious if 

 in one set, Diadel- 

 ]>]iOus if in two sets 

 (usually 9 and 1), etc. 

 Cohering pistils (car- 

 pels) form a Com- 

 pound Pistil. The de- 

 grees of cohesion in 

 calyx and corolla is 

 described, as in leaves, 

 by the terms entire, 

 flrft or lobed and 

 parted. Thus 



weed fFi^^ 50) has an ^^' ^I'^^^^andl . -if of convolvulus arvensls; above is thee rolla split 

 ^ o* ' down, displaying five unequal stamens. 



entire corolla limb; Zauschneria (Fig. 51) 

 has a 4-lobed calyx; Nemophila has a 

 5-parted or deeply 5-lobed corolla, etc. 

 If the flower has a limb (border) dis- 

 tinct from the tube, these terms apply to 

 the limb. 



Adhesion of Floral Organs. The 

 calyx 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 calyx, as in Fuch- 

 ?^ia, Strawberry, etc.; then they are said 



49 50 



48. Bud of EsrhPfeholtzia. wit^i the niitriform calyx removed and 

 Bind- ^^°^'° above. 49. Open flower <f ihi same, with two of the pptals 

 removed, one of these below witli t!ie stamens adhering to the claw. 



