Wadmond—Flora of Racine and Kenosha Counties. 819 
195. Lenina minor, L. Duckweed. 
Common; with the two preceding. 
196. Wolffia Columbiana, Karst. 
Extinct; Dr. Davis has kindly shared with me her¬ 
barium material of this minute plant, collected by him 
in 1886 in the Gas House Slough at foot of Center St., 
city of Racine. Station years ago destroyed by filling. 
CommelinacEuE. Spiderwort Family. 
197. Tradescantia Virginiana, L. SpiderWort. 
Common; along railroad tracks, borders of woods, 
roadsides. 
PoNTEDERiACEiE. Pickerel-Weed Family. 
198. Heteranthera graminea, Vahl. Water Star-Grass. 
Rare; on muddy shore of Root River, at Horlicksville, 
Racine Co. Ours is a small form. 
JuNCACEiE. Rush Family. 
199. Juncus efiusus, L. The Junci are commonly known as 
Rushes. 
Extinct; a sheet in Dr. Davis’ herbarium labeled, 
“Racine Harbor, 1880.” Station long since destroyed. 
This rush, so common in the north, appears to be 
wanting with us. 
200. Juncus Balticus, Willd. 
Occasional or frequent; a noble species growing in 
dense clumps, often three feet high, in the wet sand 
of Lake Michigan beach. It occurs also on Racine 
prairie, but there it is dwarfed and inconspicuous. The 
rootstocks are stout and beautifully varnished. Seeds 
plum-colored. 
201. Juncus bufonius, L. 
Occasional; wet sand of Lake Beach, and in abandoned 
quarries at Horlicksville. A tiny species, five to six in¬ 
ches in height. 
6—S. A. 
