ARTIFICIAL KEY TO ORDERS OR GENERA.* 



1. Fruit fleshy 2 



1 . Fruit dry 25 



2. Drupaceous, 1 to few seeded 3 



2. Not drupaceous 12 



3. An aggregation of drupelets on an oblong receptacle Rubus 91 



3. Pome-like, with 1 to 5, 1 -seeded stones. Crataegus 90 



(Compare Rosa.) 



3. Not as above 4 



4. Stone 1 5 



4. Stones 2 or 3 9 



5. Stone 2-celled Cornus 182 



5. Stone 1-celled 6 



6. Pulp waxy, scant 7 



6. Pulp juicy 8 



7. Drupe black, trees Celtis 36 



7. Drupe, white or red, shrubs or woody vines Rkus 133 



7. Drupe flattened, dark, submersed aquatic herbs Potamogeton 



8. Stone disc-shaped, with thickened margin Menispermum 68 



8. Stone oval or globose, somewhat 2 edged Prunus 97 



9. Stones 2 :.. 10 



9. Stones 3 11 



10. Fruit black, 7 mm, calyx inferior Itkammts 141 



10. Fruit red, 3 to 5 mm, calyx superior Symphoricarpns 239 



11. Pulp thin and waxy, fruit orange, herbs Trionteum 240 



11. Pulp juicy, fruit dark purple, shrubs Sambucus 238 



12. Dehiscent, a fleshy capsule 13 



12. Indehiscent 14 



13. Capsules stalked, 3 to 5 o*n a receptacle, 2-valved. . .Xanthoxylum 126 

 13. Capsule single, orange, 3-valved. aril sea' let C< lastrus 135 



13. Capsule single, purple, 4-lobed, 4-valved, aril "scarlet. .Euonymus 134 



14. A pome Pyrus S9 



14. A fleshy receptacle enclosing bony akenes Ros<( 96 



14. A fleshy receptacle bearing small akenes on the surface. . Fragaria 92 



14. Fruit multiple, each akene enclosed in fleshy calyx Morus 37 



14. A 1 to many seeded berry 15 



15. Many seeded, enclosed in an inflated calyx Physalis 220 



1"). Not enclosed in inflated calvx 16 



•The numbers referb to the genera or the order according a* the names are in 

 italics or small capitals. 



