PLANTS OF ARKANSAS. 233 



nitidum, Lam.; Coville. Dr. Vasey concludes that 

 this form must be separated from P. dichoto- 

 mum. It has undoubtedly been found by 

 others, but referred to the latter species — 

 Coville. 

 prolifericm, Lam. var. genictdatum (Ell.), Vasey; 



Nuttall. 

 sang7iinale, L. 

 scoparium, Lam.; Coville, Harvey. Nuttall's P. pauci- 



florum probably goes here — Coville. 

 vernicosinn, Muhl.; Nuttall. 

 virgatutn, L. 

 Oplismexus, Beauv. 



setarius, R. & S.; Nuttall. 

 Setaria, Beauv. 



glauca (L.), Beauv. 

 Cenchrus, L. 



tribuloides, L.; Nuttall, d'Ailly. 

 Spartina, Schreb. 



cynosuroides (L.), Willd.; Nuttall, Harvey. 

 {polystachya, Michx., Willd.; Nuttall. The occurrence 

 of this plant in Arkansas is doubtful — 

 Coville.) 

 Tripsacum, L. 



dactyloides, L. 

 Zizania, L. 



aquatica, L.; Nuttall, Lesquereux. 

 miliacea, Michx.; Nuttall. 

 Homalocenckrus, Mieg. {Leersia, Svv.) 

 lenticularis (Michx.), Harvey. 

 oryzoides (L.), Poll. 

 virginica (Willd.), Britt. 

 Thurberia, Benth. 



arkansana (Nutt.), Benth.; Nuttall. 

 Erianthus, Michx. 



