302 MOSSES (Gepp). [RapMdostegium 



HciLLA. — A widely csespitose moss, of a brilliant green colour, or 

 sometimes of a shining flavesoent green. Common, but seldom bearing 

 fruit, on the ground or at the foot of old trees in forests between 

 LopoUo aad the Monino river ; with fr. end of Deo. 1859. No. 36. 



This species is very closely related to JR. variegatum in the shape of 

 the leaves and the peristome ; but appears to be sufficiently distinct 

 in the glistening uniformly green colour, pinnate ramification, longer 

 branohlets, more erect leaves with more delicate less distinct cells, and 

 longer capsule. In R. variegatum the nerves and cell-walls of the 

 leaves are lutescent, and the cell contents are contracted into a thin 

 sinuate more or less evanescent thread. 



3. R. physaophyllos. 



Hypnum {Isoth&Aum) physaophyllos Welw. et Duby in Geneve, 

 Mem. Soc. Phys. XXI. ii. p. 434. t. iv. lig. 2 (1872). Isothedum 

 physaphyllos Jaeg. et Sauerb. Gen. et Spec. Muse. ii. p. 366 (1878). 



PuNGO Andoxgo. — A deep green, densely csespitose moss ; on damp 

 ground and at the foot of old tree-trunks in forests between Mutollo 

 and Candumba, but very rarely bearing fruit ; with fr. beginning of 

 March 1857. No. 100. 



This species is less robust than R. chrysotis Broth. [Engl. Bot. Jahrb. 

 XXIV. ii. p. 275 (1897)], and is of a brighter and more uniform green 

 colour ; but in that species it appears to find its nearest ally. In the 

 theca there is a close resemblance, but Duby found no cilia in the 

 peristome. The leaves of Welwitsoh's plant are more crowded, less 

 spreading, shorter, longly acuminate, with margins usually recurved, 

 with two very short nerves, and alar cells four instead of six, and not 

 forming an auricle. The branches are obtuse, not pungent, at apex. 



With the above species should be compared the following : — 



GoLUNGO Alto. — On bark with Rhyuchostegium hUeo-fdtens, Zengas 

 do Queta ; without fr. No. 817, in part. 



To the present genus are to be referred the following numbers 

 in the British Museum : — 



PuNGO Andongo. — A creeping moss with ascending branches. 

 Apparently rather rare on dead branches of Vellosioe, on the more 

 elevated rocks within the presidium ; with scanty fr. end of April 

 1867. No. 73. 



GrOLUNGO Alto. — In company with No. 170 (Stereophyllum Imgum- 

 folium) and with some Hepatics on the bark of trees growing in the 

 shady forests of Serra de Alto Queta ; with fr.' July 1856. Amongst 

 Hepatics, Queta Central ; with fr. July 1856. Alto Queta Central ; 

 with fr. July 1856 ; in company with No. 167 (Porotrichum elongatum) 

 on rather stout living trunks in dense primitive woods near Trombeta; 

 with fr. Aug. 1857. No. 171. 



38. TRICHOSTELEUM Mitt, in Journ. Linn. Soc. x. p. 181 (1869). 



1. T. truncatum. 



Somalia truncata Welw. et Duby in Geneve, M6m. Soc. Phys. 

 XXI. ii. p. 430. t. iii. fig. 5 (1872). 



PuNGO Andongo.— A widely csespitose, glaucous-green moss, 

 occurrmg sparsely in rooky shady places at Luxillo, but bearing very 

 scanty fruit; with fr. May 1857. No. 105. Creeping on the bare 

 roots of small ferns {Asplenium) by the banks of rivulets in Barranoo 

 de S. Antonio withm the preesidium ; without fr. May 1857. No. 114. 



