452 THE BOTANICAL EXCHANGE CLUB OF THE BRITISH ISLES. 
Cnicus Forsteri^ Sm. N.W. end of L. Owel, Co. Westmeath, 13th 
July, 1894. Mr. Bennett says of this plant, “ probably referable to 
Smith’s plant ; but not quite the same as the original in Borrer’s 
herbarium.” — H. C. Levinge. There is an interesting note on this 
hybrid in the ‘ Phytologist,’ ii., p. 888. 
C. tuberosus, Hoffm. Gathered in the locality mentioned in 
Mr, Preston’s ‘Flora of Wiltshire,’ namely, in the vicinity of Avebury, 
Wiltshire, in the middle of September, 1894. The species is plentiful 
over a very limited area of chalk overgrown with turf. In the young 
state it is only with difficulty distinguished from C. acau/is with which 
it grows, and with which I believe it hybridises. In September, it 
could be readily recognised not only by the different texture of the 
leaves, but esp dally by the shape and colour of the anthodes. The 
shape being rather hemispherical as opposed to the more cylindrical 
heads of C. acaulis. In colour the flowers of C. tuberosus are rather 
of a rose pink, while those of C. acaulis are more purple in tint. 
These characters are lost to a great extent when dried. The individual 
flowers of C. tuberosus are rather smaller than those of C. acaulis. 
Some specimens of C. tuberosus were as much as thirty inches high, 
they often had two or even three flowered stems. I might say that 
the flowers had something of the look of C. pratensls. — G. Claridge 
Druce. Excellent specimens of this rare plant. — W. R. L. 
C. pratensls, Whlld. Willington, Derbyshire, Aug.. 1894. Leg. 
R. C. Bindley. — W. H. Painter. New Record for v.-c. 57. 
C. . N.W. end of L. Owel, Co. Westmeath, 13th July, 1894 
(hybrid). Mr. Bennett remarks, regarding this thistle, that he hardly 
knows what to suggest. C. pratensls, he says, evidently has something 
to do with it, but the heads will not do iox palustrls. I found exactly 
the same plant at Lisdoonvarna, in Co. Clare, in 1891, and Messrs. 
Linton seem to have observed and gathered it at Roundstone, in 
Connemara, some years ago. — H. C. Levinge. “The plant Mr. 
Levinge sends is the same as the one he refers to, which we gathered 
at Roundstone in 1885. A note appears on it in the ‘Report’ for that 
year, p. 131. Under cultivation, its heads have become cottony, and 
it has produced good seed. We do not now regard it either as having 
anything to do with C. tuberosus, or as a hybrid, but as a curious form 
or variety of C. pratensisl ’ — E. F. L. and W. R. L 
C. acaulis x arvensls ? Dry exposed bank by roadside, Tidenham 
Chase, W. Gloucester, 7th Sept., 1894. — W. A. Shoolbred. This is 
a not infrequent form of acaulis, which in dry soils will occasionally 
run up into a long stalk. ! have gathered specimens similar to Mr. 
Shoolbred’s plant in Hunts and E. Derbyshire. There is no evidence 
of an>ensis here. In the ‘ Phytologist,’ i., p. 902, there is an account 
of the hybrid, which shows it to be quite a different plant. — W. R. L. 
Centaurea nigra, L., form with loosely imbricated phyllaries. 
Faversham, E. Kent, ist Sept., 1894. Mr. Townsend thinks this is 
C. decipiens, Thuill., but Mr. Bennett does not, and says we have not 
Thuillier’s true plant represented in Britain. The form now sent is 
characterised by its very spreading and even-reflexed appendages to 
