New and Interesting South African Mosses. 
217 
erecto-patentia, 1'5-1*75 mm. longa, e basi oblongo-ovata in acumen rohus- 
tissimum sae][)ius leniter curvatum suhacutum angustata. Costa crassissima, 
prope basin circa 120 /x lata, supra paullo angustata, hasin versus acuminis 
cum limbis subaequilatis valde crassis confluens, nude totam fere acumen 
incrassatum, omnino opacum cartilagineum fit. 
Cellulae laminae ellipticae vel rhomboideae, incrassatae, irregulares, 5-6 /x 
latae, circa duplo longiores quam latae ; inf erije sensim elongatae, rhomboideo- 
lineares. Catera ignota. ) 
Hah.— 'Nesir Hogsback, alt. 4-6000 ft., Tjumie, CP., 1916 ; coll. D., B. &M. 
Hend. (No. 213). 
Among the species hitherto described of this section, I have not found 
any with the leaf form and structure corresponding at all closely to this. 
Most of them are much larger plants, with leaves less closely imbricate, 
usually larger and often strongly falcate ; while those with the size and 
same foliar arrangement as this have the border and nerve less strongly 
developed, and especially the nerve excurrent into a comparatively short, 
cuspidate point. Here the borders and nerve are so stout that frequently 
their combined width is equal to that of the rest of the lamina in its widest 
portion, while the same cause leads to their union close to the base of the 
acumen, and the nerve is properly speaking excurrent from that point ; 
in other words the very stout acumen, forming something like half the 
length of the leaf, is practically composed almost entirely of the excurrent 
nerve. 
It is a most interesting addition to the S. African flora. 
Two or three species formerly referred to Sciaromium, from the West 
African Islands, are of quite a different character, and are now placed in 
Echinodium — a very distinct genus. 
Microthamnium ctenidioides Dixon sp. nov. (PI. XII, fig. 18.) 
§ PsEUDO-MicROTHAMNiuM. GracilUmum ; caulis primarius filiformis, 
repens, irregulariter distanter subpinnatus, ramis nonnunquam iterum 
ramulosis ; folia sicca madidaque horride patentia, luteo-viridia, subnitida, 
haud complanata, e basi ovato-cordata, amplexicauli, longiuscule argute 
acuminata, superne integerrima, inferne saepe minute denticulata ; costa 
brevissima, gemella ; cellulae superiores medianae lineares vel fusiformes, 
marginem versus breviores, rhomboideo-lineares, sigmatoideae, onines pellu- 
cidae, dorso laeves ; alares sat numerosae, irregulariter subquadratae, magis 
opacae. Autoicum. Folia perichaetialia suberecta, longe angustissime 
subulata, seta 1 cm., vel paullo ultra, tenuis ; calyptra nuda ; theca parva, 
inclinata, curvata, operculo conico, obtuse. 
-ffafe.— Near Hogsback, alt. 4-6000 ft., Tjumie, CP., 1916 ; coll. D.B.&M. 
Hend. (No. 220). 
This is a slender species, with stellately spreading leaves, in habit 
resembling some Ctenidia ; M. horridulum Broth., from Pondoland, is near 
