CRUCIFER^. 15 



51. N. palustre, BC. X. tmrxtre, Sm. 



Native ; on river banks, and in wet places, very rare. 

 G. Frome Glen, near Stapleton. 



S. On a peaty moor north of Shapwick. VII.- IX. 



BARBAREA, E. Br. 



52. B. vulgaris, 77. Br. 



Native : in damp places, common. 



A plant differing widel}- from the type was gathered in 

 the marsh by Stapleton llridge, .Tune, 1880. Its upper- 

 most leaves were pinnatifid, with a toothed terminal 

 lobe, pedicels and pods long, the latter spreading erect 

 patent. V. — VIL 



53. B. praecox, /.'. Br. 



Colonist ; in dry and rockv places, frequent. 

 G. Conham. Montpelier. St. Vincent's Rocks. Stapleton. 

 S, Brislington. South Stoke. Clevedon. V. VI. 



ARABIS, L. 



54. A. hirsuta, 77. Ur. 



Native. Frequent on the limestone about (lifton, and on 

 old walls in many places. \1. VII. 



55. A. stricta, Hiuh. 



Native ; on the limestone on both sides of the Avon at 

 Clifton, and at Penpole Point. The only British habitat. 

 This great rarity is to be found in many spots within its 

 limited area, mostly upon the living rock, but sometimes 

 amid debris from the quarries, and in turf. Unfortu- 

 nately its situations are nearly always easy of access, 

 and we are not aware that the plant bas ever shewn a 

 preference for the precipitous portions of the cliffs. 

 Exposed as it is, therefore, to the ravages of plant 

 collectors and thoughtless strangers, it behoves everj- 

 botanist to do all that in liim lies to guard it from 

 destruction. IV. \. 



