BOTANY 



OF THE 



ROCKY MOUNTAINS, 



SERIES I. 



PH^ENOGAMIA OR FLOWERING PLANTS. 



PLANTS bearing true flowers, that is, having stamens and 

 pistils and producing seeds which contain an embryo. 



CLASS I. ANGIOSPEKM.E. 



Pistil consisting of a closed ovary which contains the ovules 

 and forms the fruit. 



SUBCLASS I. DICOTYLEDONS. 



Embryo with a pair of opposite cotyledons. Leaves netted- 

 veiued. Flowers usually 4- or 5-merous. 



DIVISION I. POLYPETAL.E. 



Perianth consisting usually of both, calyx and corolla ; the 

 petals not united with each other, sometimes wanting. 



