202 NATURAL SYSTEM. 
So far all botanists are agreed : after this, the further ar- 
rangements of the orders are different in the systems of dif- 
ferent writers. I shall follow chiefly the scheme of Jussieu. — 
° 
MonocoTyLEDONE. - 
694. The Monocotyledonez are, in Jussieu’s method, i 
vided into three classes, according to the mode of insert 
of the stamens. 
(1.) The Monohypogynee, in which the stamens are /ypo- 
_ gynous, or inserted at the base of the ovary, which is her 
called superior. 
(2.) The Monoperigynee, in which the stamens are pert 
gynous, or inserted in the perianth or calyx around the 
ovary, which may be superior, inferior, or semi-inferior- 
(3.) The Monéepigynee, in which the stamens are epigyno 
or inserted aboye the ovary, which is here called infertor 
DICOTYLEDONES, 
695. The dicotyledonous orders are much more numero 
and require further subdvision. Accordingly, they are first 
arranged in three divisions. —The first embraces those which 
are destitute of petals, or apetalous: the next, those which 
have the petals united in one leaf, or are monopetalous : the 
next, those which have several distinct petals, or are polype- 
: __ Apetalous Dicotyledons. 
=< 696. The dicotyledonous apetalous plants are subdivided, 
in Jussieu’s arrangement, into three classes, according as 
“Stamens are epigynous, perigynous, or hypogynous,—| 
_ Epistaminez, Peristaminee, and Hypostaminee. Many 
_ the apetalous plants have scaly organs resembling a floral et 
velope; these consist of bracter, or of a single floral en’ 
hne Mezereum, it is convidered as a calyx, if it be si 
