FLOWERING PLANTS AND FERNS OF INDIANA. 771 



D. brachycarpa Nutt. Short-fruited Whitlow Grass. 



In dry, sandy soil and quite abundant in localities in which it 

 is found. 



Habit of growth and flowering season as in preceding species. 

 Gibson and Posey (Schneck); Daviess (Clement); Lake (Hill). 



SOPHIA. Adans. 



6. pinnata (Walt.) Britton. TaDsy Mustard. 



(Sisymbrium canescens Nutt.) 

 Occurring in dry soil in several counties. It is often found 

 along railways or in gravel banks bordering streams. 

 Flowers in June. 



Tippecanoe (Cunningham); Vigo (Blatchley); Cass (Hessler); 

 Putnam (MacDougal); Franklin (Meyncke); St. Joseph (Roth- 

 ert); Knox (Spillman). 



STENOPHRAGMA Celak. 



8. Thaliana (L.) Celak. Mouse-ear Cress. Wall Cress. 

 (Sisymbrium Thaliana Gaud.) 

 Specimen from only one station in St. Joseph County, col- 

 lected by Mr. Otto Rothert. Probably brought in along the 

 railroads from the east. Not spreading. 



ARABIS L. 



A. Virginica (L.) Trelease. Virginia Rock Cress. 

 (A. Ludoviciana Meyer.) 

 Formerly quite frequent in the State, especially in southern 

 part. Of late years becoming quite rare. 

 Flowering season, March to May. 



A. lyrata L. Lyre-leaved Rock Cress. 



In sandy soil, and especially abundant along the shores of Lake 

 Michigan, near Michigan City. Confined to northern counties. 

 Flowering season, April to July. 

 Lake (Barnes and Hill); Laporte (Barnes); Steuben (Bradner). 



A. dentata Torr. and Gray. Toothed Rock Cress. 



Apparently confined to the southern half of the State and 

 nowhere abundant. In our area it frequents dry, rocky soil, and 

 is more commonly found in open woodland. 



Flowers in June. 



