distributor’s report for 1948 
91 
have the peduncles glabrous, and the calyx of the typical bullace kind. 
The fruits in size and sha])e resemble the bullace. Plants with glal)rous 
jiedicels occur fairl_y frequently in Britain, but I have not yet been 
able to decide whether they should be regarded as a separate variety 
or subsjiecies distinct from the Continental forms with puberulous 
jmduncles or that liybridisation with the plum has taken place. Both 
plum and bul'ace are hexa])loids with somatic chromo,some number 48, 
.so that crossing may be expected.”— B. Melville. “ 1 do not regard 
P. dnmestica and P. insititia as specifically separable. There is evi- 
dence that both are ultimately derived from P. cerasifera (diploid) x 
P. spinosa (tetraploid) and the species may well have originated seve- 
ral times. Hybridisation between different strains has doubtless also 
occurred, and it is uncommon to find a plant with all the alleged charac- 
ters of either P. domestica or P. insititia. I should prefer to call this 
plant P. domestica L. subsp. insititia (L.) Poiret, though it shows cer- 
tain characters of subsp. oeconomica (Borkh.) C. K. Schneid (i.e. P. 
domestica L. sensu stricto). Notes of the flower colour (ivhether pure 
white or greenish) and stones freed from the flesh of the fruit are use- 
ful for determination in this species.” — E. F. Warburg. 
Prurms spinosa L. var. erytlirocalyx (Bony & Cam.) [P. spinosa L. 
var. hicida (Clavaud)]. (Bef. No. 5487.) 7, N. Wilts.; Liddington, 
April 11th, 1948, and Aug. 12th, 1948. — J. D. Grose. “ From the 
descriptions this fits better P. spinosa L. var. erytlirocalyx (Bouy & 
Cam.), which flowers before the leaves appear and has a vinous calyx 
with teeth poorly developed, and corolla lobes broad and rounded.” — 
B. Melville. “ This does not seem to be var. lucida Clav. as the 
leaves and flowers are not contemporaneous. It comes under ‘ P. vul- 
gatus ’ in Bouy & Camus’ (1900, Flore de France, 6. 16) classification 
There is, however, little point in giving names to the numerous small 
genetic variations of P. spinosa.” — E. F. Warburg. 
Parnassia palustris L. (Bef. No. 1484.) 61, S.E. Yorks. ; Kelley- 
thorpe Marsh, near Driffield, Aug. 29th, 1948. — B. Lewis. 
Fjpilobin<m angvstifotivm L. (as Chamaenerion angustifolivm (L.) 
Scop.). (Bef. No. 6853.) Long-podded form. 57, Derby. ; Dore, near 
Sheffield, Aug. 8th, 1948. — E. S. Edees. “ Yes, the pods are certainly 
long, due I should say to habitat, etc. Haussknecht lists 14 forms for 
Fpilohivm angnstifolium., and these plants would come under forma 
rnacrocarpa.” — G. M. Ash. 
Bvpleurvm fruticosvm T-. (Bef. No. 5563.) 3, S. Devon. ; cliffs, 
Strete, July 8th, 1948.— J. D. Grose. 
Fhm. lati folium L. (Ref. No. 1488.) 61, S.E. Yorks.; in and 
around a pond near the railway between Withernsea and Patrington, 
west of Hellym, Sept. 4th, 1948. — R. Lewis. 
