300 MOSSES (Gepp). [Trachyphyllum 



5. T. Ferriezii f rom Mayotte (Marie). a • -nt + 

 Leptohymenium Ferriezii Marie apud Besch. in Ann. Sci. Nat. 



ser. 7. ii. p. 95 (1885). 



6. T. CURVIFOLIOM from Eodriguez (Balfour). 



Pterogonium curvifoUum Mitt, in Phil. Trans. Eoy. Soc. 168, 

 p. 392, t. 37, fig. c. (1879). , • -c , 



Possibly Pylaisia Dusenii CM., described by Broth, in Jiingl. 

 Bot. Jahrb. xxiv. 2, p. 261 (1897), from Kamerun (Dusen, n. 810), 

 also belongs to this genus. 



36. RHYNCHOSTEGIUM Schimp. in Br. Seh. et Guemb. Bry. 

 Eur. V. (1851-55). 



1. R. Hopfferi. 



Eypnum (Brachytheciimi) Hopfferi Welw. et Duby in Geneve, 

 Mem. Soc. Phys. XXI. ii. p. 431. t. ii. fig. 2 (1872). Brachythedum 

 Popferi Jaeg. et Sauerb. Gen. et Spec. Muse. ii. p. 392 (1878). 



St. Thomas's Island. — A beautiful species, named after the dis- 

 tinguished Dr. Frid. Hopffer, Medical Officer of Health in the Cape de 

 Verde Islands. Welwitsch proceeds to describe this moss as csespitose, 

 with a Hypnoid habit, or rather with the habit of a Hooheria ; with 

 stems prostrate rooting, and leaves distichous bright green. Plant of 

 a bright and varying green colour ; leaves from a wide amplexicaul 

 base ovate-lanceolate, gradually acuminate, nerveless, densely areolate 

 with narrow elongate cells ; margin serrulate. Rather rare, growing 

 with Hepatics on old trunks in the dense primitive forests of Novo 

 Destino, at an elevation of about 2500 ft. ; with fr. Dec. 1860. No. 125. 



This species is closely related to R. mcgapelma C. Muell. in Dus6n, 

 Musci Afrioani Camerun. exsicc. No. 221, which is described under 

 Hypnum {Bhyiichostegium) megapelma by Brotherus in Engl. Bot. 

 Jahrb. xx. p. 212 (1894). But Welwitsch's plant is distinct in its 

 lighter brighter colour, its less crowded leaves, more chlorophyllose 

 leaf -cells, and stouter untwisted seta. 



2. R. luteo-nitens Jaeg. et Sauerb. Gen. et Spec. Muse. ii. 

 p. 434 (1878). 



Hypnv/m {Rhynchostegium ?) luteo-nitens Welw. et Duby in 

 Genfeve, Mem. Soc. Phys. XXI. ii. p. 435. t. iv. fig. 1 (1872). 



Goi.uxGO AlT(i. — Growing in company with Racopilum tomentosum, 

 Hepatics and Adiautum CapiUm Veneris, and covering with wide 

 patches of intense green the rocks by the great cataract of the Cuango 

 stream, but very rarely producing fruit ; sparingly with fruit and 

 opercula Aug. 1855 ; but when Welwitsch returned in the ensuing 

 December to collect this moss in good fruiting state, he found its 

 whole splendour destroyed by the superabundance of the water of the 

 fall, the plants being partly submerged. No. 178. Closely mingled with 

 Ectropothecium golungense on moist shaded rocks in primitive woods 

 above Undelle at the spot called " Quibolo " ; without fr. July 1856. 

 No. 154, in part. "With the same moss on the ground and on shaded 

 sandy rocks around the Ponte de Capopa near Sange ; without fr. March 

 1856. No. 180 in part. With the same moss on iron-sandstone rocks 

 m shaded spots between Undelle and the Capopa stream ; without fr. 

 April 1859. No. 187 in part. With a species of Rapliidostenium on 

 bark, Zengaa do Queta ; without fr. No. 217. Cascate de Congo and 

 de Cuanza, with scarcely any f r. Feb. 1856, March 1857. With No. 178 



