STATE GEOLOGIST. 25 



A. laevigata, Poir. Smooth Rock Cress. 



lji.keFepia,MUss Manning; Goodhue county, Sajirt/jertf,- Minneapolis, Twining, 

 Roberts; Isanti and Siierburne counties, Upham; Stearns county. Garrison; lalce Su- 

 perior, Whitney. 



A. Canadensis, L. Sickle-pod. 



Frequent througli tlie south half of the state ; extending north to the upper Mis- 

 sissippi river, Oarrison. 



A. perfoliata, Lam. Tower Mustard. 



Poplar river, lake Superior, Juni; upper Mississippi river, Garri-^on ; Stearns 

 county, Campbell; Blue Earth county, Leiberg ; lake Pepin, Miss Manning. 



A. Druinmondii, Gray. Drummond's Tower Mustard. 

 Frequent, often common, throughout the state. 



THELYPODIUM, Endl. Rock Cress. 



T. pinnatifiduni, Watson. (Arabis hesperidoides, Gray). Rock Cress. 

 Northfield, Chancy. South. 



BARBAREA, R. Br. Winter Crkss. 



B. viilg-aris, R. Br., var. stricta, Regel. Winter Cress. Yellow Rocket. 

 Put in bay, lake Superior, Juni; upper Mississippi river, Garrison; Minneapolis, 



Roberts. 



ERYSIMUM, L. Tkeacle Mustard. 



E. cheiranthoides, L. Worm-seed Mustard. 

 Frequent, or common, throughout the state. 



E. asperimi, DC* Prciirie Rocket. Western Wall-flower. 



Abundant at Walhalla, Dakota, thirty miles west of the Ked river, Scott; "a very 

 prominent object on dry, gravelly soil throughout the prairie region" of Manitoba, 

 Macoun, and ranging thence south to Mexico ; doubtless extending sparingly into the 

 west edge of Minnesota; also found by Rev.J. Pemherton a.t Redwood Falls, and by 

 Dr. Sandberg on the limestone blult of Belle creek opposite to the mill in Vasa, Good- 

 hue county, occurring (like Vesicaria Ludoviciana in the same county) far east from its 

 general limit. 



E. parviflorum, Nutt.f Small- flowered Pran-ie Rocket. 



-Red river valley, Datvson, Scott; Minneapolis (besi'le railroad a mile southeast 

 from the university: determined by Mr. Watson a,s this species; liaving light yellow 

 "petals but half longer than the (3 to 4 lines long) sepals" ; yet much branched near the 

 base, numerous stems of nearly equal hight (l to I'i feet) being thus sent up from a 

 single root; leaves narrowly lanceolate, mostly entire; pods about I'i inches long, 

 beaked with a stout style, erect on short pedicels), Upham. West. 



*Ebysimum asperum, DC. Biennial, canescent with short appressed hairs : stems 

 solitary and simple, rarely branched above, 1 to .3 feet high, or less : leaves oblanceolate 

 or narrowly spatulate ; the cauline linear to linear-lanceolate, entire or sparingly 

 repand with short acute teeth, l to 3 inches long : sepals narrow, 4 to 6 lines long, 

 strongly gibbous : petals 8 to 12 lines long, light yellow to deei) orange or purple : pods 

 1 to 4 inches long, a line wide, beaked with a stout style, ascending on stout spreading 

 pedicels 3 lines long. Brewer and Watsim's Botany of California. 



ISee description of Erysimum parviflorum, Nutt., on next page. 



