240 Drxon: NEw Mosses FROM MALAY PENINSULA 
very regularly pectinate with short branches throughout their 
length . 
E. callichroides has not been recorded from the mainland of 
Asia; its distribution has hitherto been the Philippines and Bor- 
neo. 
It was described from sterile plants, and the fruit has, so far 
as I am aware, not been found. Perichaetia are present in the 
Lankawi Islands specimen; these are large, with long, spreading, 
rigidly loriform-subulate leaves, denticulate at the tips. 
Ectropothecium siamense Dixon sp. nov. (PLATE 3, FIG. 16) 
Dioicum videtur. LE. scaberulo Broth. (E. incubans f. scab- 
erula Fleisch.) forsan affine; mediocriter robustum; caules 
regulariter pinnati, ramis circa 5 mm. longis, percomplanatis; 
sordide viride; folia valde patentia, minuscula, circa .75 mm. 
longa, valde cemplanata, nec curvata; caulina e basi ovata sensim 
breviter argute acuminata, ramea ovata, late breviter acuta; omnia 
margine plano, e basi fere breviter, densissime serrulata; cellulae 
parvae, laeves, foliis caulinis medianae breviter lineares, mar- 
ginalibus una serie brevioribus; omnes granulosa ideo sub- 
opacae, ad angulos paucae laxiores pellucidae, alas minimas, 
sat notatas formantes; areolatio foliorum rameorum sat 
similis sed omnes cellulae breviores, apicales Jaiiores, ovato- 
rhomboideae. Cetera ignota. 
HAB. Khan Poi Hill Kasum, Siam, 1898; Mohammed Hanift 
& M. Nur (3919). 
There is a close resemblance between this plant and E. 
scaberulum Broth., which Fleischer considers a form of E. incu- 
bans (Reinw. & Hornsch.). This is enhanced by the cell ends ap- 
pearing punctate under the microscope, as if projecting; they are 
however entirely smooth; the shortly pointed branch leaves, 
the rather opaque, short cells, and especially the very regularly 
and closely serrulated margins distinguish it from all the species 
I know except an unpublished species I have in my herbarium 
from New South Wales. 
It was growing closely associated with fruiting Taxithelium 
nepalense. 
