198 
IOWA ACADEMY OF SCIENCES. 
Dioscoreace^. 
Dioscoreavillosalu. Union and Ringgold counties. Thickets; 
frequent. 
Liliace^. 
Smilax herljacea 'h. Union county. Thickets; rich soil; fre- 
quent. 
S. hispida Muhl. Adams, Ringgold, and Fremont counties. 
Woods; frequent. 
Allium canadense Kalm. Union county. Fields and woods; 
frequent. 
Yucca angustifolia Pursh. Fremont county. Loess hills; 
common. 
Polygonatum giganteum Dietrich. Ringgold, Page, and Pot- 
tawattamie counties. Woods; frequent. 
Asparagus officinalis. Page, Fremont, and Montgomery 
counties. Waste places; frequent. 
Smilacina racemosa Desf. Union county. Woods; frequent. 
Erytlironium mesoclioreum Knerr. Decatur county. High 
prairies; common; blooming before E. albidum Nutt., and the 
specimens all flowering ones; the leaves very narrow; found 
also in Harrison county, Missouri. 
Lilium philadelphicum L. Union and Adams counties. Prai- 
ries; common. 
L. canadense L. Montgomery county. Prairies; frequent. 
L. tigrinum Ker. Fremont county. An escape into waste 
places. 
Trillium nivale Riddell. Decatur county. Rocky woods; 
frequent locally. 
Melanthium virginicum L. Union and Adams counties. 
Damp prairies; frequent. 
Zygadenus elegans Pursh. Decatur county. Rich woods; 
frequent locally. 
PONTEDERIACE^. 
Pontederia cordata L. Ringgold county. Margins of ponds; 
frequent. 
COMMELINACE^. 
Tradescantia virginica L. Clarke, Union, and Ringgold 
counties. Prairies and fields; common. 
JUNCACEiE. 
Juncus tenuis Willd. Union and Pottawattamie counties. 
Grassy places; common. 
