of growth ; and Exorhize from the radicle being free. 
SECTION IT. 
_DICOTYLEDONEZ. 
Exogena of De Candolle,—Ezorhize and Synorhize of Richard. 
Cuaracters.—Embryo with two opposite cotyledons, : 
or several in a whorl. Radicle not enclosed in a sheath. — 
Generally with a distinct calyx and corolla, or double 
rianth ; which, and also the sexual organs, very frequent- 
ly consist of 5 parts, or some multiple of 5: or occa- 
sionally of 2, or some of its multiples. Leaves often opposite, 
or nerves much and irregularly ramified. (See Frontis- 
piece, Fig. 4.) Stem consisting of concentric cylinder: 
surrounding a central column of pith, and composed of t 
parts, wood and bark, between which the newly form 
matter is added, (See Frontispiece, Fig. 2.) 
ExAmpres.—Oak, Elm, Rose, Pea, Poppy. 
The Dicotyledonex are called Exogene from their mo 
The Synorhize are also included i in the Dicotyledons. 
ce Dicotyledonous plants are arranged in three subsections 
3 the Apetalous, the . Son aoe and the Polypetalous. 
I. APETALE. 
_ Diesen plants, ee or none- 
