36 



flowers of C. Imlbosa being pure white. In spite of 

 6. M., the radical leaves may he orhicular- 

 Variation: 



$here are prohahly different hereditary leaf -types. 

 Sheets 8-11 (Tarhel) shows some specimens with stem-leayes 

 nearly entire, perhaps slightly sinuate, while other plants 

 hare marki aert?atlon; a few of these specimens have each 

 one or two nearly orhicnlar leaves near the middle of the 

 stem, while others hare marktly ohlong or elliptical leaver 

 ^ little ahove the base. Probably these are several 

 distinct hereditary types of leaf -form represented by the 

 plants from Tarbel, while the other specimens give some 

 evidence of such differences. 



18. Ciardamine douglassii (TorrO Brltton< 



Scientific name: 



Arabis rhomboldea var . purpurea forr. Am. 



Jour. Sci* 4: 66. 1822. 

 Arabis douglassii ^orr.; T. & 6. Fl. N. A. 



Ij 83. As synonym. 1838. 

 Cardamlne Douglassii Brltton, Trans. 



N. T^ Acad. Sci. 9: 8. 1889. 

 Cardamlne purpurea Brltton (Sat^?) 



