SUB-CLASS II. DICOTYLEDONES. 185 
Bursa bursa-pastoris (L.) Britt. (Capsella bursa-pastoris 
Moench.) Shepherd’s Purse.. A very common introduced 
weed. Decorah (Savage), Calmar, ete. 
Camelina sativa (L.) Crantz. False. Flax. An introduced 
weed. (Fitzpatrick.) 
Draba caroliniana Walt. Carolina Whitlow-grass. In sandy 
places. (Fitzpatrick.) 
Sophia intermedia Rydb. (Sisymbrium canescens Nutt., in 
part.) Western Tansy-mustard. On dry ridges, ete. Decorah 
(Savage). 
Arabis lyrataL. Lyre-leaved Rock-cress. On rocks, ete. 
Locally common. Decorah. 
Arabis dentata T. & G. Toothed Rock-cress. In rocky places. 
Decorah (Savage). 
Arabis laevigata (Muhl.)’ Poir. Smooth Rock-cress. On 
rocky slopes, etc. Decorah (Savage). 
Arabis canadensis L. Sickle-pod. In woods, ete. (Fitzpat- 
rick.) 
Arabis brachycarpa (T. & G.) Britt. (A. confinis S. Wats.) 
Purple Rock-cress. In rocky places. (Fitzpatrick.) 
Erysimum cheiranthoides L. Worm-seed Mustard. Along 
borders and on banks. Not rare. Decorah, ete. 
Berteroa incana (L.) DC. Hoary Alyssum. Not common. 
Decorah. 
Family 3, Capparidacee. 
Polanisia trachysperma T. & G.  Large-flowered Clammy- 
weed. In sandy places. Ft. Atkinson. 
Order 11. Rosales. 
. Family 1. Penthoracec. 
Penthorum sedoides L. Ditch Stonecrop. In low wet places. 
Locally common. Decorah, ete. 
Family 2, Parnassiacee. 
Parnassia caroliniana Michx. Grass of Parnassus. Quite 
rare, in bogs near Hesper. 
Family 3. Saxifragacee. 
Saxifraga pennsylvanica L. Swamp Saxifrage. Not rare, in 
bogs. Hesper. . 
