List of Families and of Genera. xv 



Family 17. ASCLEPIADACE^E (Milkweed Genus Vincetoxicum, Mo- 

 Fam.) ench. (Black Milk- 



weed). 



Genus Gonolobus, MX. 

 (Rough -Fruited Milk- 

 weed). 



Family 18. CONVOLVULACE^E (Convol- Genus Ipomoea, L. (Morn- 

 vulus Fam.) ing-Glory). 



Genus Convolvulus, Tourn. 



(Bindweed). 

 Genus Breweria, R. Br. 



(Breweria). 

 Genus Cuscuta, Tourn. 



(Dodder). 



Family 19. SOLANACE^E (Nightshade Genus Solanum, Tourn. 

 Fam.) (Woody Nightshade). 



Genus Lycium, L. (Matri- 

 mony-Vine). 

 Family 20. BIGNONIACE^E (Bignonia Genus Tecoma, Juss. (Trum- 



Fam.) pet-Creeper). 



Family 21. LABIATE (Mint Fam.) Genus Nepeta L. (Gill-over- 



the-Ground). 

 Family 22. POLYGONACE^: (Buckwheat Genus Polygonum, Tourn. 



Fam.) (Knotweed). 



Family 23. ARISTOLOCHIACE^E (Birth- Genus Aristolochia, Tourn. 



wort Fam.) (Pipe- Vine). 



Family 24. URTICACE^; (Nettle Fam.) Genus Humulus, L. (Com- 

 mon Hop). 

 Family 25. LILIACE^E (Lily Fam.) Genus Smilax, Tourn. 



(Greenbrier). 

 Family 26. FI'LICES (Fern Fam.) Genus Lygodium, Swartz. 



(Climbing Fern). 



Family 27. LYCOPODIACE^E (Club-Moss Genus Lycopodium, L. 

 Fam.) (Club-Moss). 



