91 



NOTES ON BEISTOL PLANTS. 



By Cedric Bucknall, Mus. Bac. Oxon. ; David Fry ; and 

 Jas. W. White, F.L.S. 



These notes are a continuation of those published in this 

 Journal for 1893, pp. 115-117; for 1897, pp. 123-126; and for 

 1899, pp. 417-418. As before, new vice-comital records are pre- 

 ceded by an asterisk, and Watson's vice-counties 34 (W. Gloucester) 

 and 6 (N. Somerset) are distinguished by G. and S. respectively. 



Cerastiiim arvense L. — On a bank above Portbury, S. ; Miss Ida 

 Roper. Previously known in only one spot in the county of 

 Somerset. 



■'Medic((f/o apicnlata Willd. — Several plants on waste ground at 

 Portishead, S., where it is probably an introduction. Not hitherto 

 recorded for Somerset. 



Riibus anjentatas P. J. Muell. The Lord's Wood, Houndstreet, 

 S. — *-R. micans Gren. & Godr. Clifton Down, G. — *i?. Leyanus 

 Rogers, Damory Bridge, G. — B. ccBsiua x B. riisticanus. Keyn- 

 sham, S. The abundance of this hybrid where it occurs is re- 

 markable, as it grows at intervals for a considerable distance in 

 hedges on both sides of a lane. For help in determining these 

 plants we are again indebted to the kindness of the Rev. W. Moyle 

 Rogers. 



Piosa canina L. var. dumetomm (Thuill.). Burrington Combe 

 (Mendip) ; Portbury ; Portishead, Mrs. Grerfory ; Canal bank at 

 Radford, S. 



Oirsiiiiii arvense Scop, var. obtHsilobiini, f. suhlncanum G. Beck. 

 Fl. N. 0. p. 1239. Koch, Syn. ed. iii. p. 1553. Bank of the Avon 

 below Bath, where this distinct-looking variety has been known for 

 many years under the name of Cardims setosus Bess. [Cirsium 

 setsosum Biebst.). The latter form is described in Koch, Syn. ed. ii., 

 as C. arvense y integrifolinm., and has all the leaves entire or sub- 

 dentate ; and Syme, in Eng. Bot., says that the leaves are faintly 

 sinuated or the upper ones nearly entire, and glabrous beneath. 

 In the Bath plant most of the leaves are strongly sinuately lobed, 

 with the lobes and the apex obtusely rounded and furnished with a 

 short spine at the tip, and white-felted beneath. In these characters 

 it agrees with the plant described in an arrangement of the forms 

 given in the works quoted above, where they are grouped under 

 three varieties as follows : — Var. commune G. Beck. Leaves atten- 

 uated into the terminal spine, with acute teeth. — Var. obtnsi/obum 

 G. Beck. Leaves mostly pinnatifid, with lobes and apex obtusely 

 rounded and furnished with a spine at the tip. — Var. hydrophilum 

 G. Beck. Middle and lower leaves interruptedly decurrent. 0. seto- 

 siim Biebst. is placed under var. commune as a form with nearly 

 entire leaves, almost or quite glabrous beneath. Although in the 

 Bath plant the leaves are sinuately lobed rather than pinnatifid, it 

 must be placed under the var. obtusilobum, and, as they are white- 

 felted beneath, it is the f. subincanum. On dust-heaps on the 



