104 
DTSTRTmTTOH’.H RETORT EOR 1052 
(Records of non-British material are enclosed in square brackets. 
Plants not on the current British list are not included.) 
Fumnrin mnralis Sender ssp. Bnrae.i (Jord.) Pugsl. 57, [S.W. York]; 
abundant on cultivated land neai’ Dore, Sheffield (Grid Ref. <13/d2H2), 
September 30th 1952. — F. W. Adams. “All correctly named.” — N. Y. 
Sandwith. 
Nasturtium officinale R. Br. x micro pln/JJxim, (Boenn.) Rchb. 39, 
Stafford; Springpool Wood, Whitmore, July Ith 19.52 (Ref. No. 8815).-- 
E. S. Edres. “('haracteristic matf'rial of the. hybrid.” — 11. K. .Aira' 
Shaw. 
Borippa austriarn (Cr.) Bes.ser. 17, Surrey; railway embankment. 
South Croydon (Grid Ref. 51/326.3), June .5th 19.52 (Ref. No. 4378). 
Has persisted here for at least 15 years, although mown down annually. 
— D. P. Young. “Correct.” — R. D. Mkiki.r. 
Cardnmine polcmonioides Rouy. 59, S. Lancashire; wet peaty dune 
slack near Ainsdale, June 18th 1952. — D. E. Alt.rn, comm. Botany 
School, Cambridge. “This is the northern, subarctic species of moun- 
tain rills and lowland bogs. The specimens distributed grew in jieat 
of strongly alkaline reaction. Toifortunately, lowland po])ulations of 
this species are usually involved in extensive hybridisation with C. 
pratensis L., and pure specimens are rarely to be found. Tn consequence, 
the present gathering is somewhat mixed. To avoid endangering its 
survival, oidy about ten specimens of reasonably pure C. polemon ioides 
could be included; the rest are introgressive types showing various 
tendencies in the direction of a local form of C. pratensis which also 
grows on these dunes. The population was .studied biometrically and 
stem height proved to be genetically determined. Pure C. polcmonioides 
has a stem which is only 9-11 cm. high, and the flowers are white and 
rather large.” — D. E. .Allen. 
Thlaspi alliaceum L. 15, E. Kent; abundant in an arable field. 
Ripper’s Cross, Hothfield, May 4th 1952 (Ref. No. 5205041). This alien 
was recorded from here in May 1923 (J. Min. Acjric., 30, 5.35-8) and 
refound by Dr. E. Scott. On the B.S.B.f. Field Meeting on April 6th 
1952 it was seen in abundance in flower and early fruit, and members 
may be glad to have ripe material to go with gatherings made that day. 
Further details will be found in the Report of the Conference. — J. E. 
Lousley. 
Sagina ciliata Fr. 17, Surrey; bare spots amongst thin turf on 
sandy heathland, Wisley Common (Grid Ref. 51/0758), June 15th 1952 
(Ref. No. 4396). This species seems to be characteristic of natural 
habitats such as heathy or rocky thin turf. — D. P. Young. 
Sagina filicavlis Jord. 17, Surrey; gravel paths. Great Burgh. 
Epsom Downs (Grid Ref. 51/2.358), September 16th 1951 (Rt'f. No. 
