INTRODUCTORY LESSONS. 



XV 11 



36. A Perfect Flower may consist of pistils and stamens only, and of 

 these the styles and filaments are not essential. 



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

 each other (Figs. 48- 



51) the calyx is Gamo- 

 sepalous. So, also, 

 the corolla may be 

 Gamopetalous. When 

 stamens cohere they 

 are Mbnadetphous if 

 in one set, Diadel- 

 phous 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, 



Ciejt Or lOOea and 4 g Bnd Qf Eschseholtzia, with the mitriform calyx removed nnd 

 Varied Thus* Bind- pllown above. 49. Open flower of thJ same, with two of the petals 

 * removed, one of these below with the 8tirnens adhering to the claw. 



Weed (Fi ". 50) has an *0. Flower ttd laf of Convolvulus arvensis; above is the corolla split 

 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. 



38. 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- 

 sia, Strawberry, etc.; then they are said 



