aula fee eet Se 
AMERICAN 
WEEDS AND USEFUL PLANTS. 
SERIES I. 
FLOWERING PLANTS. 
Pxants with flowers, having stamens and pistils, and producing seeds, 
which contain an embryo. 
CLASS I. 
EXOG’ENOUS, OR DICOTYLE’DONOUS PLANTS. 
Stems — — of bark, wood and pith; the wood, in stems 
—" from to year, increasing by annual layers on the outside 
Fagg ag Leaves netted-veined. Embryo with two ite 
ctylobang: or Fase devon acs whet Parts of the flower astally i 
fives or fours. : 
SUB-CLASS I. 
ANGIOSPER’MOUS EX’0GENS. eg 
Pisti. a closed ovary, containing ovules and becoming the fruit. 
Cotyledons 2. a oe : : 
DIVISION 1. << 
POLYPET’ALOUS EX’OGENS. 
Frorat Envetores consisting generally of both aes and corolla, | 
with sae aps! _ distinct .* oe 
nacaiocll: gat laaeteen ke 
ocdhite teh ame eS - 
