56 
EXHIBITION \ND LECTITRE MEETINGS, 1951 
Bor. (chromosome mimber unknown) of Sonth-west England, C. prateTtsis 
L. emend. (2n = 56) of the lowland areas of Britain, and C. polemonioides 
Bony (2n = 64) of Northern Britain and mountainous areas. The species 
ai’e morphologically well characterized, although the last two at any 
rate hybridize wherever they meet, and all have different geographical 
ranges. Increase in chromosome number can be correlated with a more 
northerly range, a greater tolerance of acid soils, and a reduction in 
statiire, leaf-size (especially in the lamina of the upper leaflets) and 
style-length . 
Herbarium material of the four species was exhibited. 
D. E. Allen, 
A Possible HyBRin Between POLYGALA VIILGABISI L. and P. 
CALC AIRE A F. Schultz. 
A live plant, and pressed material, from a roadside bank between 
Tarrant Bushton and Tarrant Monkton, Dorset, were exhibited, to- 
gether with pressed specimens of P. vulgarh and P. calcorea from Bad- 
bury Bings a few miles away. The presumed hybrid had the following 
indications of hybridity : — the shape of the leaves at the base of the 
stem is similar to that of P. ridgarh, but they were gathered into a 
loose rosette, approaching in this respect P. calcarea ; the plant is 
sterile; the luxuriant development of the plant suggests hybrid vigour. 
There is a similar specimen in the Marshall Herbarium at Cambridge, 
collected at Cranham Common, Painswick, v.-c. 33, by H. J. Biddelsdell 
as Polygnla ? Tn the notes for B.E.G. Be, port for 1912, p. 235, at- 
tached, authors mention the absence of fruit as preventing satisfactory 
identification. P. F. Yeo. 
BTTPUS VILjTjJCAZJTJC Koehl. and its allies, their place op origin 
VND DISTRIBUTION 
The following is a revised list of iiiUicaulis Koehl. and its 
allies found in Great Britain and Ireland. 
R. villicauHs Koehl. {castrensia Wolley-Dod). England, Ireland, Wales, .Tersey. 
R. Lnngei G. Jensen ex F. & G. {reclangnlafvs Maass; Riddel /tdelU Rilst.l. 
South England, Lines., Forfar. 
R. aeptentrlonalls W. Wats, (covdvls Llndeh.). North Scotland. 
7? ivsvlorls Areseh. England. Scotland, Ireland, Wales. 
R. broensis W. Wats, {villicaulls t. sllvestrla F. & G.-. Tinleri/thros Rog.l. Surrey. 
Berks. 
7? atrocnuJls P. J. Miiell. South England. 
R. Fnvnnii W. Wats, (vyramirlnlis Rog, p.p.). South England, West Scotland. 
R. ivcvrvatvs Bah. England. Scotland, Ireland, Wales. 
R. macroacanthos Weihe & Nees. Norfolk. 
R. Iricvs Rog. Ireland. 
R. stairnevs Bart. & Ridd. South-west England, Surrey. 
By crossing B. gratvs 9 with B. hifrors c? Focke obtained a fertile 
bramble closely resembling B. vilUcavlis. He knew of no place in Ger- 
many where P. grains and B. hifrons were found together, or where 
