78 NEW YORK STATE MUSEUM 



Brassica arvensis (Z.) B. S. P. 



B. Sbiapistrum Boiss. 



Charlock. Wild mustard 



Introduced and troublesome in fields of grain, specially in fields of 

 oats. Not abundant in North Elba. 



Brassica campestris L. 



Turnip 

 Introduced and cultivated but occasionally spontaneous in fields. 

 Allen farm. 



Brassica Napus L. 

 Rape 

 With the preceding and closely resembling it but distinguished from 

 it by having the base of its upper leaves auricled or sagittate. 



Bursa Bursa-pastoris (Z.) Britton 



Capsclla Bursa-pastoris Moench 



Shepherd's purse 



Gardens, fields and waste places. Very common. Flowering speci- 

 mens of this introduced and annoying weed may be found from early 

 spring to late autumn. The clustered basal leaves of the young plant 

 bear some resemblance to those of the dandelion and are sometimes 

 mistaken for them by inexperienced persons. 



Dentaria diphylla Mx. 



Two leaved toothw'ort. Crinkle root 

 Wet or damp places. Rare. Old Keene road. June. 



Draba incana arabisans {Mx.) Watson 



Twisted whitlow grass 



Thin soil on rocks. Rare. Indian pass, its only known locality in 

 the town and not plentiful there. It was in fruit in August. In Nenf 

 York state flora it is given specific value and bears the name Draba 

 arabisans Mx. 



