50 
I'llK JOURNAL OF SOT ANY 
B. ckloropkana Stirt. in Ann. Sc. N. H. xii. 110 (1903). (Ben 
Lawers ; 1807.)—This gave me a good deal of trouble. Stirton 
compares it with B. reeurvifolia. It is very much like a robust 
form of that, with leaves fully 3 mm. long, but differs in several 
marked characters, as it does from all the allied species of Barbula 
with which I compared it. It turns out to be a very marked form 
of Grimmia apocarpa subsp. gracilis, with hairless leaves ; the nerve 
highly muricate at back is quite characteristic ; the recurved leaves 
are unusual, and I think, if this plant be treated as a subspecies, 
rather than as, a var. of G. apocarpa , Stirton’s may well be given 
varietal rank under it. I propose therefore to call it 
Grimmia gracilis Schleich. var. chlckropiiana (Stirt.) Dixon 
comb. nov. 
B. ferruginascens Stirt. in Ann. Sc. N. H. ix. 170 (1900). 
(Orkney, Mainland ; Aug. 18S9 : published 14 Apr., 1900.)—The 
date 1887 in the published description is an error. There is only one 
packet. It is Barbula rubella var. ruberrima Braithw. The margin 
is not actually thickened, as the description might seem to imply, 
but very closely reflexed, as Stirton makes clear in his MS. notes. 
B. incavata Stirt. in Scott. Bot. Rev. i. 93 (1912). (Onich, 
rocks near the sea, and old walls; Sept. 1909.)—This is a very com¬ 
pact form of Weisia rupestris —indeed, the var. compacta B. & S. 
B. limosa Stirt. in Ann. Sc. N. H. xiv. 100 (1905). (Muddy 
stream near the sea, Arisaig ; Aug. 1904.)—This is a small form of 
Trichosiomumjlavo-virens, with no very distinct characters. Stirton, 
in describing lus Mollia subbifaria (which appears to me very 
ordinary Trick. jlavo-virens'), states that he is now disposed to put 
B. limosa as a var. under it. In another publication Stirton refers 
to this plant as Mollia limosa. 
B. limosella Stirt. in Ann. Sc. N. H. xvi. 175 (1907). (Arisaig; 
Sept. 1907.)—This is one of the very few of Stirton’s species which 
appears to me of value. It clearly has affinity with Trickostomum 
jlavo-virens ; but it is an extremely small plant with very small 
leaves, which are more or less strongly recurved when moist, the 
margins plane, not incurved above, the apex subobtuse with the nerve 
excurrent in a short cuspidate point. The cells are slightly larger 
than in T. jlavo-virens, and are very pellucid, nearly smooth, instead 
of being highly obscure with dense papillae as in that species. I 
propose to retain it as an independent species, but it is possible that 
it ought to be considered as a subsp. of T. jlavo-virens. 
B. obtusula Lindb.—Stirton (Glasgow Nat. vi. 99 [1914]) has 
recorded this as a British plant on the basis of a specimen from the 
Bridge of Allan. The specimen is labelled “ Nr. Bridge of Allan ; 
25 Apr. 1914,” but Stirton has corrected this to “ Markinch, end of 
May, 1914.” 
B. obtusula Lindb. rs described as twice or thrice as large as 
B'.revoluia, the leaves more spirally contorted, seta paler, perichsetium 
more prominently exserted, more open, Ac., Ac. I do not And any 
of these characters in Stirton’s plant, which appears to me to differ 
in no way from our southern B. revoluta. I have not seen B. obtusula, 
which Lindberg states he has not seen from any where beyond Sweden. 
