FLOWERING PLANTS AND FERNS OF INDIANA. 565 



Castalia odorata (Dryand) Wood v. and Wood (= Nymphcea odorata Ait.). 

 Sweet-scented Water Lily. 



Castalia tuberosa (Paine) Greene (= Nymphoea reniformis D. C). Tuber- 

 bearing Water Lily. 



Nelumbo lutea (Willd.) Pers. Yellow Nelunibo, or Water-chinquapin. 



Sarracenia purpurea L. Pitcher-plant. Side-saddle Flower. 



Ranunculus Purshii Kichards (=i?. imdtifidus Pursh.). Yellow Water 

 Crow-foot. 



Batrachium trichophyllum (Chaix.) Bossch. (= Ranunculus aquatilis tricho- 

 phyllus Gray). Common White Water Crow-foot. 



Roripa palustris (L.) Bess. (=Nasturtium palustre D. C.) Marsh Cress. 



Roripa Nasturtium (L.) Rusby. (=Nasturtium officinale R. Br.) True 

 Water Cress. 



Roripa Americana (Gray) Britton (= Nasturtium lacustre Gray). Lake 

 Cress. 



Callitriche heterophylla Pursh. Water Starwort. 



Isnardia palustris L. (=Ludwigia palustris Ell.) Water Purslane. 



Hippuris vulgaris L. Mare's Tail. 



Myriophyllum spicatum L. Water-milfoil. 



Myriophyllum verticillatum L. 



Myriophyllum heterophyllum Michx. 



Myriophyllum pinnatum (Walt ) B. S. P. (==M. scabratum Michx.) 



Myriophyllum humile (Raf.) Morong. (=M. ambiguum Nutt.) 



Sium cicutozfolmm Gmelin. Water Parsnip. 



Hottonia inflata Ell. Featherfoil. Water Violet. 



Utricularia vulgaris L. Bladderwort. 



Utricularia purpurea Walt. 



Utricularia gibba L. 



Dianthera Americana L. Water-willow. 



Bidens Becldi Torr. Water Marigold. 



To this list there would properly be added the numerous forms of 

 rushes (Juncacece), sedges fCyperacece) and grasses (Graminece), 

 which are omitted because the species are unfamiliar and in many 

 cases of difficult discrimination. Many forms, which are more strictly 

 marsh plants, might also have been listed at this place. These marsh 

 plants stand for a soil very rich in water and are true hydrophytes. 



THE XEROPHYTE FLOKA. 



The researches of Dr. H. C. Cowles, of Chicago University, upon 

 the Dune Floras of Lake Michigan, have made it possible to present in 

 considerable detail various plant unions of this type. From the mono- 



