SYNOPSIS OF THE ORDERS OF PLANTS CONTAINED IN VOLUME VIII 



OF THE SILVA OF NORTH AMERICA. 



Class I. DICOTYLEDONOUS or EXOGENOUS PLANTS. 



Stems increasing in diameter by the annual addition of a layer of wood inside the bark. Leaves netted-veined. Embryo 

 ■with a pair of opposite cotyledons. 



Sub-Class I. Angiospemise. Pistil, a closed ovary containing the ovules and developing into the fruit. 

 Division III. ApetalflB. Corolla 0. Stamens inserted on the petaloid calyx, or hypogynous. 



51- Cupuliferse. Flowers monoecious or rarely perfect. Stamens 2 to 4 or indefinite. Ovary inferior, after anthesis 

 imperfectly 2 to 3 or rarely 4 to 6-celled. Ovule solitary, or in pairs, ascending or descending, anatropous. Fruit a 

 nut usually more or less inclosed in bracts free or united into a woody involucre. Leaves alternate, stipulate. 



