A KEY 
TO THE 
NATURAL ORDERS OR FAMILIES 
OF PLANTS DESCRIBED IN THIS WORK. 
Series 1. FLowerine Puants. Plants with flowers, having slamens and 
pistils, and producing seeds, which contain an embryo. 
Cuass J. Exogenous or DicoryLeponous Puants. Stems distinctly 
Eewed o of bark, wood and pith ; the wood in stems lasting from pet to year, 
nergy by annual layers on the outside next the bark. Leaves netted- 
ined. “Embryo with two opposite pecnerse ne heh ig ely Pine family) seve- 
fat es x Wat Parts of the flow ers usually 
Sup-cLass 1. ANGIOSPERMS. Pistit a closed ovary, containing ovules 
deat becciainye the fruit. Cotyled 
E Sivieen ston I. PotypetaLous: Calyx and corolla both present (except in 
some oe of Order I); the petals entirely separate (except in Order 
where they are sometimes un ited). 
= A. STAMENS NUMEROUS, MORE THAN 10. 
1. Stamens borne on the receptacle. entirely free from the calyx, corolla or ovary. 
Piptils more thin. one; ellen separa fea ‘sack cased 
“ 
= Herbs with perfect flowers and divided ee RANUNCULACER, 26 
- §Small trees with 6-petalled flowers and en 
— Ter hinders pi «86 
Pistils numerous, grown together one above 
pits: akan 2 g the long receptacle. MAGNOLIACEA, 
Pistils only. 1 ot - several, more or less completely 
ores aaa and I-celled, with only one 
plac 
Petals large. Filaments shorter than the 
