PlagiochUa] hepaticb (Stephani). 315 
2. P. decurrens Steph. sp. a. 
Dioicous, Plant rather small, slender, dense] 
olivaceous. Stem up to I cm. long, very much and almo i fascicu 
lately branched \ branches subsimple and pinnately divided al 
the top into shorl floriferous hranchlets. Leaves not spreading 
much From the Btem (al an angle of 30 |, obliquely oblong, on the 
poetical side shortly inserted, longly Lncumbenl on the stem, on 
t he antical side very Longly decurrent, al apes truncate bi- 
tridentate, upper margin sparingly dentate, the teeth being 
widely triangulate and short. Apical cells 17/-, median 17 by 
25 /'. basal 17 by 35 p.; trigones rather large. Perianths 
terminal '>n ultimate branchlets, oblongo-obcuneate, on one side 
winged, al apes truncate, closely and equally dentate spinose, the 
spines being slender and setaceous al apex. Innermost floral 
leaves from a narrow hase obliquely ovate, al apes subtruncate, 
margins everywhere grossly crenato-spinose, quite entire at the 
base only. 
The original specimen was gal bered by Dusen in the( 'ameroons. 
The species is mosl distinct ; it is easily recognised by its very 
decurreni Leaves, and can be compared with no other species 
hitherto known. 
Golungo Alto. On old trunks by rivulets in Alta Queta; July 
L857. No. 280. 
3. P. divergens Steph. in Bedwigia, \\\. p. 268 I 1891 |. 
Golungo Alto. -On continually wel rocks by the cataracts of the 
Cuango river near Sange; Au_i. 1855. No. 303. In Mata de Quisu- 
cula, near Bango Aquitamba; Jan. 185 !. No. O03 1 '. 
I, P. praemorsa Steph.inEnghBot.Jahrb. viii.p.92,fig.l 3(1887). 
Puxgo Andongo. -On trunks near the ground in .Mata da Pedra 
Pungo; .May L857. No. 234. 
Goluxgo Alto. — On schistose rock-- near the rivulet of Capopa; 
Oct. 1854. Xc 298. In Mata de Quisucula; Feb. 1855. No. 304. 
5. P. strictifolia Steph. in Hedwigia \xx. p. 210 i 1891 }. 
Golungo Alio.— Among mosses on the banks of the Cuango river: 
• Line 1856. No. 221. With Thuidium gratum No. 113). Alta Queta; 
Jan. 1856. No. 271. On Kipepel tfonodora angt ■ i ta)andoth< 
Alta Queta; March 1856. No. 273. Quisucula ; Feh. 1855. No 290. 
Mixed with Euleji unea Echlonii amongst mosses ( W - h >' gi <"• etc.) 
on rocks on the banks of the Coango river near Sauge; June 186b 
No. 325. Cataract of the Cuango river; 5 July 1856. No. 328. 
6. P. thomeensis Steph. in Engl. Bot. Jahrb. viii. p. 81 
Goli ngo Alto. With elongatum (cf. No. 146 . Quisu 
cula; Feb. 1856. No. 274. In the woods of Sobado Quilombo; July 
L856. No. 291. On trunks of old trees by the side of a rivulet. 
Zengas da Queta ; one specimen found with fr. May 1856 x 
Oazengo On the righl bank of the river Luinha, Mata de 
Muxaula: .Fan. 1855. No. 275. 
To this genus are referred the following numbers: 
l-i.\\h of St. Thomas, i espitose, intensely green, in company 
