INTRODUCTORY LESSONS. XXs 
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- 
sepalous. So, also, 
the corolla may be 
Gamopetalous. When 
stamens cohere they 
are Monadetphous it 
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, asin leaves, 
by the terms entire, 
48 49 50 
cleft or lobed and 48. Bud of Eschseholtzia, with the mitriform calyx removed and 
e ‘ _ Shown above. 49. Open flower of the same, with two of the petals 
paried. Thus: Bind removed, one of these below with the stamens adhering to the claw. 
= 50. Flower and leaf of Conyolvulus arvensis; above is the c rolla split 
weed (Fig. 50) has an 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- 
sia, Strawberry, etc.; then they are said 
