1910.] NATURAL SCIENCES OF PHILADELPHIA. 579 



10. Panicum virgatum L. 

 Delaware. — Lenni. 



11. Panicum microcarpon Muhl. 

 Delaware. — Williamson. 



12. Panicum lindheimeri Nash. 

 Delaware. — Middletown Barrens. 



13. Panicum tennesseense Ashe. 

 Delaware. — Middletown Barrens. 



14. Panicum commonsianum Ashe. 

 Delaware.— Wawa (C. S. Williamson). 



15. Panicum addisonii Nash. 

 Chester. — Brinton's Quarry. 



16. Panicularia nervata (Willd.) Kuntze. 

 Delaware. — Williamson. 



17. Cyperus diandrus Torr. 

 Chester. — West Chester; Unionville. 



18. Dulichium arundinaceum (L.) Britton. 

 Delaware. — W illiamson . 



19. Eleocharis palustris glaucescens (Willd.) A. Gray. 



Chester. West Chester. 



20. Scirpus cyperinus (L.) Kunth. 

 Chester. — Nottingham Barrens. 



21. Tradescantia virginica L. 

 Chester. — Cedar Barrens. 



* 22. Salomonia commutata (R. and S.) Britton. 

 Delaware. — Williamson. 



23. Hypoxis hirsuta (L.) Coville. 

 Chester. — West Chester. 



24. Peramium pubescens (Willd.) MacM. 

 Delaware. — Middletown Barrens. 



