KEY TO THE ORDERS. 



,*, Figrures in the margrin refer to pages. When names are not followed by figures the genus- or order 111* 

 dicated is not elsewhere described in this book. 



Calyx and corolla together of either more or less than six parts CLASS I, 6 



Calyx and corolla together of just six parts: petals never five. 



Stamens six or three 



Stamens many : sepals three, green f CLASS II, 12 



Stamens one or two united to the style: ovary inferior 



Stamens many: flowers solitary on long peduncles Papaveraceae, 18 



Stamens ten: petal one: a shrub LeguminossB, 39 



Stamens nine: flowers apetalous, small. 



An aromatic tree: flowers greenish Umbellularia. (Laurel.) 



Herbs with several or many flowers in involucral cups Eriogonum. 



CLASS I— EXOGENS OR DICOTYLEDONS. 



Calyx and corolla both present. 



, Petals not united (distinct) DrVISION 1, 5 



Petals more or less united (cohering) DIVISION 2, 9 



Calyx and corolla one or both wanting DIVISION 3, 10 



DIVISION 1.— POLYPETAL^. 



A. STAMENS MORE THAN 10. 



1. Stamens not adhering to the sepals or petals (on the receptacle). 



• Pistils few to many distinct carpels. 



Calyx deciduous, sepals 5: no stipules RanunculaceSB, 14 



Calyx persistent, sepals 3 or 4: growing in water NsrmphaeaceaB, 17 



Calyx pt-rsistont, sepals 5 or 10: leaves with stipules RosaceeB, 48 



Calyx of petal-like sepals: corolla often wanting Ranunculaceae, 14 



