FLORA 
OF THE 
SOUTHERN UNITED STATES. 
SERIES I. 
PHZENOGAMOUS or FLOWERING PLANTS. 
VEGETABLES furnished with flowers, consisting of stamens 
and pistils, and usually floral envelopes of some kind, and 
Donan seeds which contain m bE ae ie. 
Crass I. DICOTYLEDONOUS on EXOGENOUS PLANTS. 
Stem composed of bark and pith, which are separated by 
an interposed layer of woody fibre and vessels, and increas- 
ing in diameter, in all perennial stems, by the annual depo- 
sition of new layers between the wood and bark. Leaves 
reticulate-veined, commonly articulated with the stem. . 
Floral envelopes usually in fours or fives.  Cotyledons — 
two, rarely more. 
Sugctass l| ANGIOSPERMZ. 
Ovules enclosed in an ovary, and fertilized by the action 
of the pollen, through the medium ofa stigma. Cotyledons 
two. 
Drviston I. POLYPETALOUS EXOGENOUS PLANTS. dl 
beeen eon double, iba 9b both caly: 
