76 MORPHOLOGY. 
leaves (thus episepalous), the flower is called obdiplostemonous ’ 
(Gruinales, Crassulacew, Saxifragacez). 
According to the number of circles of the parts of the flower, 
the latter is spoken of as tri-, tetra-, or pentacyclous ;? and accord- 
ing to the number of members of the circle, as tri-, tetra-, or 
pentamerous’ circles. The typical dicotyledonous flower is 
pentacyclous-pentamerous (Fig. 12), the typical monocotyledo- 
nous flower (Fig. 13) pentacyclous-trimerous. 
In addition to a drawing (projection of the flower upon a 
plane), or by means of a diagram, the structure of the flower 
i O 
* 
f x 
i 1 
' , 
A US77 7 oe 
J - O f . 
Fia. 12. Fie. 18, 
Fie. 12.—Typical diagram of a dicotyledonous flower. 
Fia. 13,—Typical diagram of a monocotyledonous flower (Liliacese) (Tschirch). 
can also be expressed by formulas,‘ as e. g., the typical dicotyle- 
donous flower : 
K (calyx) 5 
C (corolla) 5 
A (andreceum) 5 +5 
: G (gyneceum) (5 ) 
which indicates that the androeceum consists of 2 pentamerous 
circles, and the gyneceum of a superior ovary [ (5) ], formed of 
5 coalesced carpels (Fig. 12). Ifa circle is deficient, it is de- 
1 Ob, opposite. 
* Tpis, rérpa, wévre (three, four, five), xvxAos circle. 
*Tpis, rétpa, wévre (three, four, five), uépos part. 
*See under Androeceum in Eichler’s ‘* Syllabus.” 
