13 



itles wbere It vas collected* but has not been found else^ 

 where by the writer- 

 Diagnosis : 



Stem-leaves bright green* thin* smooth* usually 

 few -serrate » 

 Variation: 



The specimens show decided evidence of the exist- 

 ence of two or more different types of leaves within the 

 species. Sheet 1 (Fall Cr* ravine* 5-22-1912) has two 

 marktly different specimens - one with stem-leaves near- 

 ly as in Britton and Brown's illustration* the other 

 with leaves Buich longer and relatively narrower* nearly 

 all the stem-leaves being decidedly lanceolate and near- 

 ly entire. Sheet 2 ($aughannock* 1911)^ one specimen* 

 and Sheet 3 (Esty*s Glen* 1912) show types rather inter- 

 mediate between those of Sheet 1* while Sheet 8 (evi- 

 dently Fall Cr. ravine* 1911) has a specimen with* ap- 

 parently* the broadest leaves of all. The contrast of 

 the specimen of Sheet Zt even with that of Sheet 3> is 

 very decided. 



''• Arabis lyrata L . 

 Scientific name: 



Arabis Ijrrata L. Sp. PI. 665. 1753. 



