KEY TO NATURAL ORDERS. 



Class I. DICOTYLEDONS. 



Pith surrouuded with concentric layers of wood and bark. 

 Leaves net veined. Flowers often 5-merous. Embryo with 2 coty- 

 ledons ; radicle forming a tap-root. 



Division 1. ANGIOSPERMS. 



Ovules in a closed vessel and fertilized through a stigraa. 

 Embryo with 2 cotyledons. 



Sub-Class I. POLYPETAL^. 



Calyx and corolla present. Petals several^ distinct, rarely want- 

 ing. 



A. Thalamiflorse — Torus small, rarely disciform. Ovary supe- 

 rior. Stamens hypogynous. 



1. Ramcnculacece. — Herbs or climbing- shrubs. Leaves alternate or 

 opposite. Sepals deciduous. Stamens indefinite. Seeds without au 

 arillus. 



2. Dilleniacece. — Trees or shrubs. Leaves alternate, simple ; lateral 

 veins prominent. Sepals persistent. Carpels usually distinct. Seeds 

 with an ai'illus. 



3. MagnoliacecB- — Shrubs or trees- Leaves alternate, simple ; sepals 

 and petals trimerous, imbricated, deciduous. Stamens indefinite. Carpels 

 distinct. Albumen uniform. 



4. Anonacecn^ — Trees or shrubs, often scandent. Leaves alternate, 

 simple. Stipules 0. Sepals 3> petals 6, in 2 series of .3 each. Stamens 

 indefinite. Carpels distinct in fruit (united in Anoiia). Albumen 

 ruminate. 



5. Menispermacece — Climbino- or twining shrubs- Leaves alternate. 

 Stipules 0. Flowers small, unisexual, deciduous, usually trimerous 

 Stamens definite, free, or connate, opposite the petals* Embryo usually 

 curved. 



6. Capparidefe. — Trees or shrubs often scandent or herbs. Leaves » 

 alternate. Petals 4. Stamens indefinite. Ovary stalked, seeds on 

 parietal placentas. Albumen 0. 



7. Besedacete- — Herbs or shrubs. Leaves entire or pinnatisecfc. 

 Flowers bractcate- Disc usually conspicuous (0 in Olignmeri.'^'), Sla« 

 mens numerous. Fruit a capsule or berry. Seeds numerous. 



