192 Transactions of the Moyal Society of South Africa. 
obscure cells and decidedly twisted peristome. The teeth in T. rvfiseta are 
only very slightly twisted, in the negative direction. 
Tortella tortuloides (Sull. & Lesq.) Broth. Barberton, 3000 ft., 
Transvaal, 1917; coll. Sim (No. 8684). 
Trichostomum sulphur eum Rehm., M. Austr. Afr. 471, appears to me to 
be a small state of this species. Paris' reference of this to Leptodontium, 
as L. transvaaliense Par,, is due to some confusion merely ; Trichostomum 
stdphureum Pehm. is ante-dated by T. sulphureum C. M. (Leptodontium 
sulfur eum Mitt,), and this no doubt led to the confusion on the part of 
Paris ; Rehmann's plant could under no circumstances be considered a 
Leptodontium. Kehmann's name is moreover a nomen nudum only, and as 
it seems to me almost certainly the same thing as the present species, 
I think the name may very well be allowed to disappear, 
Triquetrella strictissima (Eehm.) C. M. Near Cape Town, 1915 ; 
coll. H, A. W, (No. 345). Alicedale, CP., 1912; coll. Prof, G, Potts, 
comm. Sim. Mr. Sim sent the last as T. tristicha CM., remarking that he 
could not separate Rehmann's Zygodon strictissimus from it. The two 
seem to me doubtfully distinct ; Rehmann's specimen of T. tristicha has 
short, closely imbricate leaves and strongly triquetrous stems, and if these 
characters be of any value I think Prof. Potts' gathering must be referred 
to T. strictissima. 
? Triquetrella filicaulis Dus. Near Hogsback, 4-6000 ft., Tjumie, 
CP., 1916; coll. Hend. (No. 187a). A few stems picked out of Thuidium 
promontorii. A very different plant from the above, with elongate, 
flexuose stems, 4-5 cm. long, very sparsely branched, with distant leaves, 
which are widely spreading to squarrose, and strongly decurrent at base, 
and especially marked by having the stems finely niuriculate throughout. 
In all these characters it agrees with T. filicaulis Dus. from Southern 
Chile, original specimens of which I have compared. That species, 
however, is compared by Dusen with T. scahra C M, from Victoria, 
Australia, from which he says it can hardly be separated vegetatively, but 
the peristome characters appear to afford some specific differences. In 
the absence of fruit it appears to me impossible to say with certainty to 
which of these two species, if either, the African plant is to be referred. 
The mnriculate stem is a sufficiently unusual character to justify a strong 
presumption in favour of T. filicaulis, but I have not been able to examine 
specimens of T. scahra to see if it obtains there also. Dusen in his 
description of T. filicaulis does not mention this character ; he also 
describes the leaves as "vix decurrentia," but I find them markedly 
decurrent in his specimens, and the stems are muriculate as in the African 
plant. 
Leptodontiu7n squarrosum (Hook.) Par. (syn. L. epunctatum [C M.] Par.). 
Woodbush, Northern Transvaal, 1910 ; coll. T. Jenkins, comm. W. Ingham, 
