DR. STIRTON’S BRITISH MOSSES 
69 
DR. STIRTON’S NEW BRITISH MOSSES REVISED. 
Br H. N. Dixon, M.A., F.L.S. 
(Concluded from p. 52.) 
Ortiiotrichaceje. 
Ancectangium marinum Stirt. in Ann. Sc. N. H. xviii. 244 (1909). 
(Corran, near Onich; Ang. 190S; and Ardgour, near Onich ; Sept. 
1908.)—I have examined these and several others of the packets. 
They are all fairly well-marked forms of A. compactum var. 
'pellucidum. 
Zygodon teichophilus in Scott. Nat. No. xv. p. 36 (1887).—• 
Th is, as I understand it, is Stirton’s name for the moss described by 
Schimper as Z. Stirtoni and by Lindberg as Z. aristatus. 
Jjlota scoticci Stirt. in Ann. Sc. N. H. xiv. 106 (1905). (“Near 
Arisaig ; 31 Aug., 1904. Publ. 17 Nov., 1904.” And, “ on branches 
of hazel, Kinloid Road, Arisaig ; 20 July, 1906. The best form.”)— 
The slight distinctions drawn by Stirton between this and U. phyl- 
lantha do not seem to be borne out by the specimens. Thus Stirton 
says “ No basal marginal row of pellucid cells as in IT. phyllanthaT 
But I have found these cells well marked in the specimens. It is 
true that many leaves do not show them, but that is frequently or 
usually the case with this species. I can see nothing but a slight 
form of IT. phyllantha at most. Stirton writes of the Kinloid Road 
plant “ 18 capsules, pale, short, with pink teeth ” ; and in Ann. Sc. 
N. H. xvi. 171, he describes the fruit at some length. But an 
examination of these capsules shows that they are entirely due to an 
intermixture of Orthotrichum pulchellum, and there are no capsules 
of the TTlota present. One would have thought that the pink colour 
of the teeth, to which Stirton refers, would have led him to their 
identity, but no doubt the somewhat crisped leaves misled him. 
Still an almost cursory examination shows the difference of foliation 
from the TJlota. 
Orthotrichum prcenubilum Stirt. in Ann. Sc. N. H. xix. 242 
(1910). (Onich; 13 Aug., 1908.)—Stirton describes it as barren, 
but it has immature fruit. He relies on the strongly revolute margin 
and irregular apex of the leaves as the specific characters, but both 
apply exactly to either O. affine or O. stramineum ; and the calyptra 
and vaginula show it to be the latter species. 
O. prasinellum Stirt. in Ann. Sc. N. H. xix. 241 (1910). (Onich ; 
Sept. 1908, on Elder.)—There is only one tuft, with a single im¬ 
perfect capsule, of this. A further specimen is labelled “ Onich ; 
Sept. 1909. Type.” But it is not type according to the data in 
the published description cited above. However, both specimens 
undoubtedly belong to the same species. Stirton compares it with 
O. tenellum , stating that the capsule is larger—which apparently is 
the only distinguishing character ; I do not, however, find it so, and 
can see'no difference at all from ordinary O. tenellum. 
