104 Cheney and True—Flora of Madison and Vicinity . 
Maianthemum, Wigg. 
571. M. Canadense , Desf. 
Low, wet woods north of Lake Wabesa. Tn a simi¬ 
lar place west of Lake Wingra. Local. 
Uvularia, L. Bell wort. 
572. U. grandiflora, Smith. 
In all woodlands. 
Erythronium, L. Dog’s-tooth violet. 
573. E. albidum , Nutt. White dog’s-tooth violet. 
Rich woods about the lakes. 
Lilium, L. Lily. 
574. L. Philcidelphicum , L. Wild orange-red lily. Wood' 
lily. 
Along railroads and in other places on wild land. 
575. L. superbum , L. Turk’s-cap lily. 
Margins of wild meadows. Rather rare. 
Trillium, L. Wake robin. Birthroot. 
576. *T. erectum , L. 
In rich woods east of Lake Mendota. Not com¬ 
mon. 
577. *T. grandiflorum , Salisb. 
With T. erectum. Much rarer. 
PONTEDERIACEiE. (PICKEREL-WEED FAMILY.) 
Pontederia, L. Pickerel-weed. 
578. P. cor data, L. 
Abundant in northwestern part of Lake Wingra. 
Local. 
Heteranthera, Ruiz & Pav. Mud-plantain. 
579. H. graminea , Vahl. 
Yahara river below Lake Monona. Dr. Chas.. 
Morong kindly determined this species. 
COMMELINACEiE. (SPIDERWORT FAMILY.) 
Tradescantia, L. Spiderwort. 
580. T. Virginica, L. Common spiderwort. 
Along railroads. Not uncommon. 
