INTRODUCTORY LESSONS. 



XXx 



A Perfect Flower may consist of pistils 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 calyx is Gamo- 

 sepnlous. So, also, 

 the corolla may be 

 Gamopetalous. When 

 stamens cohere they 

 are Monadetphous if 

 in one set, Diadel- 

 phous if in two sets 

 (usually 9 and 1), etc. 

 Cohering pistils (car- 

 pels) form a Covi- 

 pound Pistil. The de- 

 grees of cohesion in 

 calyx and corolla is 

 described, as in leaves, 

 by the terms entire, 

 cleft or lobed and 

 parted. Thus 



■aracA ('TT^rr '^n\lina n r> 50. Flowor and 1 .'if of Convolvulus arveasis; ubovo is the corolla Bplll 

 weetl ^Xlg. OU) ua« <IU ^own. displaying nve unequal stamens. 



entire corolla limb; Zauschneria (Fig. 51) 

 has a 4-lobed calyx; Nemophila has a 

 5-partcd or dc!0])ly 5-lobed corolla, etc. 

 If the flower has a limb (border) dis- 

 tinct from the tube, these terms apply to 

 the limb. 



Adhe.tion of Floral Organs. The 

 calyx may grow fast to the ovary (Fig. 51), 

 then it is said to be Supt'rior (ovary in- 

 ferior). The corolla and stamens fre- 

 quently grow on the calyx, as in Fuch- 

 sia, Strawberry, etc.; then ihey are said 



48 49 60 



48. Bud of EsrhBeholtzia, with the mitriform calyx removed and 

 13ind-- "hewn above. 49- Open tliwer of th 3 same, with two of tlie petals 

 ^"^1" removed, onfi of these below with tlie Btnmens adhering to the claw. 



