98 ILLINOIS BIOLOGICAL MONOGRAPHS [188 



EXPLANATION OF PLATE 



Fig. 13, a-e — CusctUa pringld 



Fig. 14, a-e — CusctUa choisiana 



Fig. 15, a-e — Cuscula deltoidea 



Fig. 16, a-e — Cuscula tincloria typica 



Fig. 16, f-g — Cuscuta tinctoria kellermaniana 



Fig. 17, a-e — Cuscuta gracilUma sublilis 



Fig. 17, f-g — Cusctita gracillima saccharaia 



Fig. 18, a-e — CusctUa lacerata 



