848 'Wisconsin Academy of Sciences, Arts, and Letters. 
522. Linum sulcatum, Riddell. Yellow Flax. 
Rare; prairies and dry, gravelly hillsides. 
Rutaceje. Rue Family. 
523. Xanthoxylum Americanum, Mill. Pricldy Ash. 
Common; wood borders. 
524. Ptelea trifoliata, L. Hop-Tree. 
Rare; thickets and stream borders. 
PolygalACE iE. Milkwort Family. 
525. Polygala verticillata, L. Milkwort. 
Prequent; grassland, usually in dry soil. 
526. Polygala sanguinea, L. Milkwort. 
Common; prairies. 
527. Polygala Senega, L. Seneca Snakeroot. 
Common; prairies. The Ill. Flora says of it, “In 
rocky woods.” This is not so with us. 
528. Polygala Senega, L., var. latifolia, T. & G. 
Rare; wooded hank along Pike Creek, Somers, Ke¬ 
nosha Co. Hot known from any other station. 
Euphorbiace;e. Spurge Family. 
529. Acalypha Virginica, L. Three-seeded Mercury. 
Rare; gotten in waste ground near Wind Lake, Ra¬ 
cine Co. Rot seen elsewhere. 
530. Euphorbia polygonifolia, L. The name Spurge applies 
to the entire genus. 
Frequent; but only on beach of Lake Michigan, both 
counties. 
531. Euphorbia maculata, L. 
Common; waste places, mostly in sandy soil, through¬ 
out. 
532. Euphorbia Preslii, Guss. 
Frequent; along railroad tracks and in waste places, 
in various soils. 
533. Euphorbia corollata, L. Flowering Spurge. 
Common; prairies and roadsides. 
