ALYSSUM — ARABIS. 259 



Alyssum calycinum L. English type. Colonist. Area 

 8765.32. Range 0-200. Not unfrequent in cultivated 

 fields, especially in the sandier portions of the Central Valley. 

 Wath, Kirklington, Nether Poppleton, Acomb, Thirsk, Wood- 

 end, Carlton Miniott, Northallerton, Great Ayton, Ganthorpe, 

 etc. The highest station in which I have seen it is the plateau 

 of the calcareous hills above Rievaulx. 



Alyssum incanum L. Alien. In a forage field near 

 Pickering; G. H. Lightfoot \ Seed field near Breckenborough; 

 Miss Hincks. 



Cardamine amara L. British type. Native. Area general. 

 Range 0-300. Frequent in watery places in the Lower Zone, 

 ascending to Holwick and 1,000 feet in Gayledale above 

 Hawes ; F. A. Lees. 



Cardamine pratensis L. British type. Native. Area 

 general. Range 0-800. Common in damp and grassy places, 

 ascending to the Main Limestone of Mickle Fell. 



Cardamine hirsuta L. British type. Native. Area 

 general. Range 0-800. Common upon banks and rocks, 

 with the same vertical range as the preceding. C. sylvatica 

 Link is frequent in shaded woods, especially in the dales. 



Cardamine impatiens 1>. Incognit. Reported by R. 

 Teesdalc from the ncighl)Ourhood of Richmond, l)Ut not seen 

 recently. 



Arabis thaliana L. British type. Native. Area general. 

 Range 0-500. Frecjuent upon walls and dry banks, ascending to 

 Hell Gill and the Main Limestone .scars of the Buttertubs Pa.ss. 



Arabis petraea Crantz. Incognit. Reported from rocks 

 U[)on the slope below Whitston Cliff, apparently in error for 

 Cardamine hirsuta. 



Arabis hirsuta R.Br. British type. Native. Subxero- 

 philous. Area 9876.32. Range 50-500. Frequent upon 

 the Limestone Scars of the western dales, ascending to Cronkley 

 Scars and the Main Limestone cliffs of Punchard's (iill and 

 Boo/.e Moor. About the Magnesian Limestone at Tanfield and 



Aug. 1889. 



