THE FLORA: 
oR, 
SELECTIONS FROM THE NATIVE AND CULTIVATED PLANTS 
OF THE UNITED STATES. 
Designed as first exercises in Analytical Botany. 
Expianations,—The Tables in this work are designed to be complete, that is, each Ordinal 
Table includes all the genera belonging to that order known within the limits of the Flora (i. 4, the 
States east of the Rocky Mountains); and each Generic Table includes, in like manner, ald its 
Known species. The numbers annexed to the genera in the Ordinal Tables, refer to the descrip- 
tions immediately following. If no number be annexed, the pupil will understand that that genus 
is not further noticed. 
COHORT I. 
THE POLYPETALOUS EXOGENS. 
Essential Character—Flowering Plants (Przyoeamta), 
with their stems growing by additions to their outside in 
layers (Exocens), their seeds inclosed in a seed-vessel or peri- 
carp (ANGIosPErMs), their flowers with a double perianth and 
their petals distinct (PoryrrraLz). (But to this last condition 
there are many exceptions.) 
Orver I. RANUNCULACEX The Crowfoots. 
Herbs, rarely shrubs, with a colorless, acrid juice, with 
leaves mostly alternate and much divided, without stipules; 
sepals 8-15, deciduous, distinct, and colored when apetalous; 
petals 3-15, distinct, often deformed or contracted or wanting; 
stamens ow, distinct, hypogynous ; 
pistils » (rarely 1 or few), distinct, becoming in 
fruit either achenia, follicles, or berries. 
