242 



3. Flowers outside receptacles 



Flowers inside receptacles 



4. Leaves strongly 3-nerved 

 Leaves penuinerved 



5. Female flowers in spikes 

 Female flowers in globular heads 



6. Female flowers in large pear-shaped 



masses 

 Female flowers in globular heads 



7. Leaves subserrate, suddenly acuminate; 



styles 6 times longer than perianth 

 Leaves entire, blunt ; styles short 



8. Tree 

 Shrub 



9. Leaves 3-nerved 

 Leaves penninerved 



10. Leaves crenate ... 

 Leaves entire ... 



11. Leaves smooth and glabrous ... 

 Leaves rough or velvety 



12. Plant climbing ... 

 Stem erect 



13. Leaves 5-11-partite 

 Leaves entire ... 



14. Flowers spicate ; female calyx tubular 

 Flowers fascicled or cymose ... 



15. Leaves opposite 

 Leaves alternate 



16. Leaves symmetrical 

 Leaves oblique at the base 



17. Hairs stinging ... 

 No stinging hairs 



18. Flowers on a discoid receptacle 

 Flowers fascicled 



19. Female calyx tubular, enclosing achene 

 Female calyx 3-4-partite ; achene free 



20. Stigma discoid ; perianth adnate 

 Stigma fihf orm ; perianth free 



21. Glomerules racemose-spicate ... 

 Cymes solitary, axillary, stalked 



22. Leaves symmetrical 

 Leaves oblique at the base 



23. Flowers some or all on a fleshy 



receptacle ... 

 Flowers cymose 



24. AU flowers on a fleshy receptacle 

 Male flowers only on a fleshy receptacle 



4. 



13. Ficus. 



5. 



6. 

 11. Morus. 

 10. Broussonetia. 



15. Artocarpus. 



7. 



9. Malaisia, 



14. Cudrania. 



9. 

 12. 

 11. 

 10. 



1. Ulmus. 



4. Gironniera. 



2. Celtis. 



3. Trema. 



5. Humulus, 



13. 



6. Cannabis. 



14. 



23. Boehmeria. 



15. 

 16. 

 22. 

 17. 

 18. 



16. Urtica. 



18. Pilea. 



19. Lecanihus. 



24. Pouzolzia. 



20. 

 21. 



25. Villebrunea. 

 24. Pouzolzia. 



17. Fleurya. 

 8. Fatoua. 



19. 

 23. 



24. 



20. Pellionia. 



21. Elatostema. 



22. Procris. 



1.— ULMTTS. 



1. U. parvifolia, Jacquin ; Planch, in DC. Prodr. xvii. 161. 

 garden at Canton. Fl. green, August ? 



In a 



