156 THE JOURNAL OF BOTANY 
There is little doubt that the first ee" moore were dated 
‘*1815,” and that fascicle 10 was dated < ic and it is not 
certain that these fascicles were not i iach before the 
close of those years. In fact, all of the dates Pe which notices 
appeared in the Bibliographie de la France may be as much as six 
or eight weeks later than the actual sabhestiol of the fascicles. 
PLAGIOTHECIUM PILIFERUM IN BRITAIN. 
By D. A. Jonzs, F.L.S. 
In August, 1902, Messrs. Cleminshaw and Duncan and I paid a 
visit of a fortnight’s duration to Ben Lawers, and devoted most of 
that time to the investigation of the rich moss-flora of its slopes. 
Last year, in looking over his collection, Mr. Duncan noticed a 
Plagiothecium in trait” which somewhat resembled a small form of 
P. denticulatum in habit. Upon closer inspection, however, it was 
found to differ considerably from any forms of that panei Wik 
v 
were narrower. The small straight scouts was also very charac- 
teristic. It was sent to Professor Barker for his opinion, and 
declared it to be P. piliferum, which determination was subsequently 
confirmed by Mr. H. N. Dixon. 
The following is for the most part a translation of Schimper’s 
eg ae in the Bryologia Europea, to which the measurements 
fro cht’s Laubmoose Deutschlands, &c., have been added :— 
E tsitencd tufts, beautifully green and fruiting freely. 
Stems sified branched, prostrate, and sparingly radiculose ; branches 
nearly erect or curved. Leaves small, crowded, distichous, com- 
planate, widely ovate-lanceolate, 1-1-2 mm. long, and 0°5-0°6 mm. 
wide, suddenly contracted to a very long, fine, and oer acumen, 
bracts resets paler, gradually an ongly acuminate ; - the aa ior 
ones convolute and re Peviguted bracts widely ovate, acu- 
erga he red, 10-15 m. long. a ineli or almost 
brown. Calyptra long, na: pit to the maiddle. Lid conical, 
cord clio gi sberistome-tcth distinct, very hygroscopic, 0°45 
mm. long, and 0-035 mm. broad, pale, with distant articulations, 
hyaline andexede Sno papillose; inner peristome colourless ; basal 
membrane very short, 0°07 mm. high. Cilia none or rudimen 
Spores yellowish atom Hat fei 014mm.,smooth. Monoicous: male 
flow: ertil 
It grows Sisnost iamell on granite or siliceous rocks, 
covering their vertical and overhanging faces in wide flattened tufts. 
