248 NINETEENTH REPORT. 



CRUCIFERACE.E. 



Arabis laevigata (Muhl.) Poir. var. heterophylla, N. var. 



Arabis heterophijlla Nutt. ; T. & G. Y\. N. Amer. I, 81, 1838. (?) 

 Lower part of stem, including leaves, and the rosette leaves pubescent 

 with short, spreading hairs, elsewhere glabrous and glaucous. Rosette 

 leaves and lowermost stem leaves lyrately pinnatifid gradually passing to 

 obovate and laciniate, thence to ovate, ovate-, oblong-, and linear-lanceo- 

 late and dentate or entire. The rosette leaves and those on the lower 

 part of the stem are purjilish underneath. Flowers erect on erect or 

 slightly spreading pedicels ; petals white, six or seven millimeters long, 

 from one-half as long again to twice as long as the sepals ; pods spread- 

 ing or recurved five to seven centimeters long by one and three-quarters 

 to two millimeters wide with a short, stout style not over a millimeter 

 long or sessile stigma. Zoological Park near Royal Oak No. 4210, 

 July 13, 1916. 



This plant cannot be typical A. laevigata as that is always described 

 as entirely glabrous and glaucous while the lower parts of this plant are 

 pubescent. The longest leaves are on tlie basal part of the stem and are 

 about five centimeters long; the shortest are the uppermost and are six 

 or seven millimeters. It may be the A. heterophylla of Nuttall which 

 was described as with hirsute radical leaves. 



SAXIFRAGACE^. 



TiARELLA CORDIFOLIA Lin. Var. BRACTEATA, N. Var. 



Scape bearing on the middle section a petioled leaf somewliat similar 

 to the basal but much reduced in size ; petiole three millimeters to two 

 centimeters long and the ovate, three-lobed blade from one-half to two 

 centimeters in length and breadth. Near Disco, Macomb Co., No. 4153, 

 May 25, 1916. 



CALCARATACE^. 



Viola Canadensis Lin. var. pubens, N. var. 



More or less densely and almost canescently pubescent throughout 

 with short, spreading hairs. Otherwise like the specific type which is 

 here considered to be the common glabrous form. Near Disco in Macomb 

 Co., No. 4155, May 25, 1916. 



Viola conspersa Reichb. var. masonii, N. var. 



Flowers pure white. Has the appearance of V. striata but can be 

 readily distinguished by the entire sepals. Near Utica, No. 4163, June 

 6, 1916. Named for Mr. E. W. Mason of Lapeer who first observed 

 it near Utica and who called my attention to it. 



