ARTIFICIAL KEY TO ORDERS OR GENERA.* 



1. Fruit fleshy 2 



1. Fruit dry 25 



2. Drupaceous, 1 to few seeded '. 3 



2. Not drupaceous ] 2 



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



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



(Compare Eosa.) 



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 Rhus 133 



7. Drupe flattened, dark, submersed aquatic herbs Potamoyeton 3 



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



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



9. Stones 2 10 



9. Stones 3 11 



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



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



11. Pulp thin and waxy, fruit orange, herbs Triostcum 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 on a receptacle, 2-valved. . .Xanthoxylum I2t» 

 13. Capsule single, orange, 3-valved, aril sculet Celastrus 135 



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



14. A pome Pyrus 89 



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 Moms 37 



14. A 1 to many seeded berry 15 



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



15. Not enclosed in inflated calvx 16 



•The numbers refers to the genera or the order according- as the names are in 

 italics or small capitals. 



