172 
R. verticillacanthci Merat. Rowney Warren, Beds, v.c. 30, 
Sept. 2, 1921. — J. E. Little. The material is insufficient. The 
plant looks like a starved form. I do not think it is verticillacantha , 
though perhaps it belongs to the Andegavenses. Its prickles 
and leaflets recall R. arvensis, with which it may possibly be a 
hybrid. — A.I1.W.-D. More and better material would be 
desirable. So far as the present specimen permits of an opinion, 
it may perhaps be best put as a very weak form of var. 
verticillacantha Merat, weak in two respects, viz. the serration is 
hardly compound enough and the glands on the peduncles are 
very sparse — indeed, none at all, or one, or two, on the various 
pedicels. I don’t see any signs of its being a hybrid. — W. Barclay. 
R. dumetonm Thuill. 1 Near Offley Grange, Herts, v.c. 20, 
Aug. 15, 1921. — J. E. Little. R. dumetonm , var. urbica Christ. 
Off type in its small leaflets and very prickly, glandular petioles. 
— A.H.W.-D. Yes, var. urbica Lem. — W.B. 
R. collina Jacq. Left bank, Oughton Head, Hitchin, Herts., 
v.c. 20, Sept. 3, 1921. — J. E. Little. R. dumetonm, var. Deseglisei 
Christ (R. collina auct. Brit, non Woods nec Jacq.), I now make 
the var. collina of most British authors a synonym of var. 
Deseglisei, the true plant of Jacquin not having been satisfactorily 
determined as British. — A.H.W.-D. I agree with Col. Wolley- 
Dod. — W. Barclay. 
Pyrus Aria Ehoh., var. rupicola (Syme). Millers Dale, Derby, 
v.c. 57, one tree, Aug. 12, 1921. — A. B. Jackson. Comm. W. C. 
Barton. 
Sedum sexangulare L. Introduced on the edge of a shrubbery, 
Leigh Woods, Bristol, v.c. 6, July 1894. — J. W. White. 
Callitrichc polymorpha Lonnr. Peaty ditch, Unst, Shetland, 
Aug. 4, 1921. — 14. J. Burdon. All the sheets showing mature 
fruits are C. stagnalis Scop, in my judgment. On one of these, 
however, Mr. D. Lumb found two fragments, each possessing a 
fruit with extremely long styles — not divaricate. It is therefore 
apparent that at least two species grow in this water, and we 
should like to see good fruiting specimens of the latter. — W. H. 
Pearsall. Certainly not Lonnroth’s plant. The original speci- 
mens from Shetland were gathered by the late Mr. Beeby at 
Burn of Sundabanks, Scallory, Sept. 12, 1888; these were 
“probably referred to it,” but from Unst Mr. Beeby gathered 
specimens that were definitely so named, and well agree with 
Swedish examples in my herbarium from “Scania, 1881, 
N. Hjalmar Nilsson.” It may be well here to quote Mr. Beeby 
