Flagiochikt] iiepatics (Stephani). 315 



2. P. decurrens Steph. sp. n. 



Dioicous. Plant rather small, slender, densely csespitose, 

 olivaceous. Stem up to 4 cm. long, veiy much and almost fascicu- 

 lately branched ; branches subsimple and pinnately divided at 

 the top into short lloriferous branchlets. Leaves not spreading 

 much from the stem {at an angle of 30°), obliquely oblong, on the 

 postical side shortly inserted, longly incumbent on the stem, on 

 the antical side very longly decurrent, at apex truncate bi- 

 tridentate, upper margin sparingly dentate, the teeth being 

 widely triangulate and short. Apical cells 17 /x., median 17 by 

 25 /A, basal 17 by 35 /x, ; trigones rather large. Perianths 

 terminal on xiltimate branchlets, oblongo-obcuneate, on one side 

 winged, at apex truncate, closely and equally dentato-spinose, the 

 spines being slender and setaceous at apex. Innermost floral 

 leaves from a narrow base obliquely ovate, at apex subtruncate, 

 margins everywhere grossly crenato-spinose, quite entire at the 

 base only. 



The original specimen was gathered by Dusen in the Cameroons. 

 The species is most distinct ; it is easily recognised by its very 

 decurrent leaves, and can be compai^ed with no other species 

 hitherto known. 



GoLUNGO Alto. — On old trunks by rivulets in Alta Quota; July 

 1857. No. 280. 



3. P. divergens Steph. in Hedwigia, xxx. p. 2G8 (1891). 

 GoLiTXGO Alto. — On continually wet rocks by the cataracts of the 



Cuango river near Sange; Aug. 1855. No. 303. In Mata de Quisu- 

 cula, near Bango Aquitamba; Jan. 1856. No. 303&. 



4. P. prgemorsa Steph.iuEngl.Bot.Jahrb. viii.p.92,fig.l-3(1887). 

 Puxco AxDOXGO. — On trunks near the ground in Mata da Pedra 



Pungo; May 1857. No. 234. 



GoLUXGO Alto. — On schistose rocks near the rivulet of Capopa; 

 Oct. 1854. No. 298. In Mata de Quisucula; Feb. 1855. No. 304. 



5. P. strictifolia Steph. in Hedwigia xxx. p. 210 (1891). 

 GoLUXGO Alto. — Among mosses on the banks of the Cuango river; 



June 1856. No. 221. With Thuidkim gratum (No. 143), Alta Queta; 

 Jan.l85G. No. 271. On X\Y)epe (Mottodora a ngolmsis) and other trees, 

 Alta Queta; March 1856. No. 273. Quisucula : Feb. 1855. No. 290. 

 Mixed with Eulejev,nea EcJdonii amongst mosses (R/n/nchnsf.i'r/i/dn. etc.) 

 on rocks on the banks of the Coango river near Sauge; June 185b. 

 No. 325. Cataract of the Cuango river; 5 July 1856. No. 326. 



6. P. thomeensis Steph. in Engl. Bot. Jahrb. viii. p. 81 (1886). 



GoLiiXGo Alto. — With Porotrkhum, elonrjatum (cf. No. 146), Quisu- 

 cula; Feb. 1856. No. 274. In the woods of Sobado Quilombo; July 

 1856. No. 291. On trunks of old trees by the side of a rivulet, 

 Zengas da Queta ; one specimen found with fr. May ]85(;. No. 324. 



Cazexgo. — On the right bank of the river Luinha, JNIata de 

 Muxaula; Jan. 1855. No. 275. 



To this genus are referred the following numbers : — 



Island of St. Tiio.mas. — Caespitose, intensely green, in company 



