342 THE BOTANICAL EXCHANGE CLUB OF THE BRITISH ISLES. 
namely, 3a. T. balticum, Dahlst., which occurs in Finland, Oeland, 
Denmark, and North Germany, &c. Indeed he queries Britain on 
the evidence of Herb. Jacquin, and T. lapponicuin^ Kihlm., occur- 
ring in Iceland, Faroes, Norway, &c. 
I am unable to find any reference in the ‘ Monograph ’ to 
T. spectabik, Dahlst., or to maculiferum^ Dahlst. The latter is 
reported from St. Kilda, the former from Shetland. 
Monographie der Gattung Potentilla in Bibliotheca 
Botanica. Stuttgart, 1908, pp. 714, tt. xx. An exhaustive ac- 
count of the genus in which 305 species are described. The follow- 
ing have been found in Britain : — 
895. Potentilla argentea, L., has 10 varieties, of which 
two appear to be British, i.e. var. dissecia, VVallr., and var. decumbens 
(Jord.), Focke. 
894. P. canescens, Bess., is treated as a full species {F. 
inclinata, Vill., is given up). 
892. P. recta, L., has 10 varieties, of which sulphurea, 
Lam. and DC., and obscura (VVilld.), Koch, have been found by 
me as casuals in Britain. 
893. P. hirta, L., has 11 varieties. 
893 bis. P. thuringiaca, Bernh. (the F. opaca, J. C. Melv. 
in ‘ Rep. B. C.’), and var. Nestleriana., Tratt. The latter has been 
found as a casual at Oxford. 
899. P. Crantzii, Beck., is described as F. a/pestris, Hall, f., 
with var. debilis (Schleich.), and has many varieties and hybrids 
given. 
900. P. VERNA, L. p.p., has also several varieties and hybrids. 
One, the alpestris X verna 1 is the Grassington plant, which I sent 
to Herr Wolf, who reported “an forsan alpestris x vcrnaP 
901. P. REPTANS, L., has 5 varieties — the microphylla, Tratt., 
being British, as well as the two hybrids. 
902. P. procumbens, Sibth., with the hybrid, F. procumbcns 
X erecta. 
903. P. ERECTA, Hampe, is given as F. Tormentilla^ Neck., 
with 5 varieties, including sciaphila (Zimm.). 
890. P. Anserina, L., has 7 varieties, of which nuda., Gaud., 
and sericca, Hayne, are British. Herr Wolf does not include 
Sibbaldia among the Potentillas. The geographical sources and the 
