NATURAL SYSTEM. OOS 
Monopetalous Dicotyledons. 
697. The dicotyledonous monopetalous plants are divided 
ito the hypocorollee with hypogynous stamens ; pericorollee, 
with perigynous stamens; and the epicorollee, with epig'- 
dus stamens. The latter are divided into the Synantheree, 
the anthers united; and the Chorisantherex, with the 
nthers distinct or free. It must be remembered that the 
tion of the petals always corresponds to that of the 
lamens ; we never have epigynous stamens and a hypogy- 
ous corolla; the terms ‘ epigynous” and hypogynous”’ 
er indifferently to the stamens and corolla. 
Polypetalous Dicotyledons. 
698. The dicotyledonous polypetalous plants are divided 
into the epipetalee, with epigynous stamens ; the hypopetalee, 
with hypogynous stamens ; and the peripetalen, with perigy- 
nous stamens. ae 
699. The names of the classes are very charnctedeae: 2: 
The three classes in the monocotyledonous divisions are 
marked by the prefixture mono. ll the others (except the 
ia) are in the dicotyledonous divisions. The first 
‘three classes in this division are apetalous ; accordingly the 
terms petal or corolla are not mentioned in their names. 
the next three classes the plants are monopetalous :— 
here, then, the*term petal, which is generally used to ex- 
press one of the parts of a polypetalous corolla, is not used. 
The terni employed is corolla, which signifies the whole 
corolla, and may be properly applied to express an entire — 
corolla. In the names of the last three classes, which are 
polypetalous, the term petal is used, signifying that the co- 
rolla here consists of several pieces or petals. ‘These names 
were =e the classes by Richard. pee ie 
