216 
Transactions of the Royal Society of South Africa. 
(No. 7239) ; Hogsback, Tjumie, CP., 1917; coll. D. Hend. (No. 335). All 
c. fr. 
Thuidium siiblaevipes Dixon sp. nov. (PL XII, fig. 16.) 
T. laevipedi Mitt, affine ; differt habitu rohustiore, ramulis minus com- 
^lanatis, f oliis siccis magis incurvo-crispatis ; seta longiore, usquae ad 2*5 cm. 
longa (illius 1-1-5 cm.) ; theca diqjlo fere major e, longiore, 2 mm. longa, 
curvata, sicca vacua suberecta. 
Hah. — Kaapsche Hoop, Transvaal, coll. H. A. W. -(No. 295), c. fr. ; 
Tjumie, 4-6000 ft., CP., 1917 ; coll. D. Hend. (No. 358) c. fr. 
Although near to T. laevipes, this is, I have no doubt, a different species, 
distinguished by the characters italicised above. 
Thuidium promontorii C M. Near Hogsback, 4-6000 ft., Tjumie, CP., 
1916 ; coll. Hend. (No. 187) ; near Lovedale, CP., 1913 ; coll. J. Henderson 
(No. 98) ; Pretoria, 1915 ; coll. Sim (No. 8558), c. fr. 
Hypnacbae. 
Hygroamhlystegium filicinum (L.) Loeske. Upper Bushman's E,iver, 
7000 ft., Natal, 1905 ; coll. Sim (No. 8670). Only a small quantity of this 
was sent, mixed with Dicranella Symonsii sp. nov. It is a very dwarf form, 
but cannot, I think, be separated in any way from our northern species, 
which have similar, and even smaller forms. It has not been hitherto 
recorded from South Africa. Distrib. : Europe, north to Spitzbergen, East, 
West and North Asia, North America, Algiers, New Zealand. H. procerum 
Dixon sp. nov., from Mt. Kenia, may perhaps be considered a subspecies. 
Sciaromium Mitt. § Limbidium. 
A genus of aquatic mosses having leaves of a very distinct structure, not 
hitherto represented in Africa ; only one of the described species has yet 
been found in fruit. Most of the species belong to this section, distinguished 
by its leaves with very distinct, stout, thickened, entire border. They are 
nearly all confined to the subantarctic region of the southern hemisphere, or 
the higher mountains of S. America. The differences between the species 
are for the most part slight, and Cardot has expressed the doubt (' Flore 
Bryol. des Terres Magellaniques, <fec.,' p. 180) whether they are not mostly 
forms of a single species, S. conspissatum (Hook. f. & Wils.) — a view in 
which my examination of various species would lead me to concur. The 
present plant, however, differs from these species fully as markedly as most 
of them differ from one another, and for the present at least it must be 
treated as a new species. 
Sciaromium capense Dixon sp. nov. (PI. XII, fig. 17.) 
Sat robustum, aquaticum, nigritum ; caules circa 5 cm. longi, sicca 
rigidiusculi, madida molles, parce divisi, hie illic quoque breviter irregulariter 
ramulosi. Folia dense conferta, hand vel vix secunda, sicca madidaque 
