1858.] THIRSK NATURAL HISTORY SOCIETY. 501 



THIESK NATUKAL HISTORY SOCIETY. 

 Botanical Exchange Club. 



The monthly meeting of the Thirsk Natural History Society 

 was held in the evening of Wednesday^ the 3rd of June. Mr. 

 W. Foggett, of Thirsk, \¥as admitted as a resident member^ and 

 Miss Edmonds, of Brighton, and Mr. John Barton, of Christ's 

 College, Cambridge, were duly enrolled as members of the Bo- 

 tanical Exchange Club. 



Mr. J. G. Baker communicated the following notice relative 

 to Draba verna : — 



" M. Jordan maintains that Draba verna of authors, by some 

 called Erophila vulgaris, is made up of several truly distinct 

 species, and, in his ' Pugillus,' describes five of these, which I am 

 going to enumerate, giving at the same time a condensed epitome 

 of the diagnoses which he furnishes. 



"1. E. brachycarpa. Sepals ovate, hispid. Silicles half to a 

 quarter as long as the upper pedicels, subelliptico-rotundate, 

 rounded above, slightly narrowed below. Styles short, thin. 

 Seeds pale, 16-20 in a cell. Leaves ovate-lanceolate, entire or 

 subdentate, tolerably hairy. Habit of growth slender. 



" 2. E. glabrescens. Sepals ovate, slightly hispid. Silicles 

 fully half as long as the upper pedicels,- oblong-elliptic, narrowed 

 slightly at both ends. Styles short. Seeds 20-24 in a cell. 

 Leaves intensely green, limb narrowed into a petiole which is 

 usually as long as itself, glabrous or slightly hairy. 



"3. E. hirtella. Sepals ovate-oblong, unequal at the base, 

 clothed above with incurved hairs. Silicles fully half as long as 

 the upper pedicels, oblong, narrowed slightly at the apex and 

 gradually to the base from two-thirds of the way down. Styles 

 long. Seeds 30-35 in a cell. Leaves lanceolato-linear, acute at 

 the apex, narrowed below into a broad petiole, furnished usually 

 with one or two sharp teeth on each side, clothed both upon their 

 under and upper surfaces with long, spreading, grey hairs. 



" 4. E. stenocarpa. Sepals long, hispid. Silicles about half 

 as long as the upper pedicels, linear-oblong (four times as long 

 as broad). Seeds about 40 in a cell. Leaves linear, acute, nar- 

 rowed into petioles which about equal the limbs, densely coated 

 with hairs. 



