288 THE BOTANICAL EXCHANGE CLUB OF THE BRITISH ISLES. 
R, thyrsiger, Bab. In quantity at Llantrissant, Glam., Aug. 
1907. Discovered there by Mr. Rogers in 1905. — H. J. Riddels- 
DELL. 
R. rosacens, subsp. infecundus, Rogers. Port Talbot, v.-c. 
41, 29th July 1907. Named by Mr. Rogers. — H. J. Riddelsdell. 
R. rosaceus, sp. coll., subsp., Purchastajim. Sellack, Here- 
fordshire ; 7th September 1907. — Augustin Ley. 
R. Marshalli, var. semiglaber, Rogers. Port Talbot, v.-c. 41, 
’29th July 1907. Named by Mr. Rogers. — H. J. Riddelsdell. 
R. velatus, Lefv. Wood at Glynhir (near Llandebie), Carmar- 
thenshire ; July 1907. New County record. — Augustin Ley. 
R, dumeiontm^ W. and N., var. radnliformis, Ley. Near 
Eltham (also at Barnetby and other stations), N. Lincoln ; August 
1907. New County record. — Augustin Ley. 
R. dumetomin W. & N., var. triangularis, Ley. Whitbourne, 
Herefordshire; August 1907. The specimens are not very char- 
acteristic ; but are this variety. — Augustin Ley. 
R. Balfourianus, Blox. Woods near Grasby, abundant and 
characteristic (also at Barnetby), N. Idncoln. Petals usually white, 
sometimes pink. — Augustin Ley. Rightly named, I believe, thdugh 
untypical in the glabrous or glabrescent stem, very broad roundish 
terminal leaflet and narrow stipules. — W. Moyle Rogers. 
R. Balfourianus, Blox. Hedges, Bridstow, Herefordshire; July 
and September 1907. Petals uniformly white. — Augustin Ley. 
Geum rivale, L., albino. Stanton, Staffs., cult., nth June 1907. 
— W. R. Linton. 
Potentilla erecta, Hampe, var. sciaphila (Zimm). P. Tormen- 
tilla. Neck., var., sciaphila, Asch. & Gr., Syn. VI. 838 .(1904). 
Sandy, ericetal places, Richmond Park, Surrey, 28th Aug. 1907, 
leg. A. B. Jackson & K. Domin. This well marked variety has 
only hitherto been recorded from East and West Cornwall by Mr. 
Davey (see ‘Watson Exchange Club Report,’ 1905-6, p. 50), and 
from heathy hills of the rolled pebbles of the 'I'hanet sands 
(‘B. E. C. Report,’ 1905, p. 167); but an examination of the 
material preserved under the name Potentilla Tormefitilla, Neck. 
( = /*. silvestris), at the British Museum and Kew shows that the 
variety is of fairly general distribution in Britain. It may be dis- 
tinguished from tlie type by its smaller, prostrate habit, the .stems 
