— B94 — 



truiu-ate or rarely aciite, 3-5 teeth, short, i to 3 cells wide at tlic base; cells 

 sinallisli quadrato or ohloiifr-quadrate, large trigoncs. Bracts ovate-lanceolate, 

 laoiniate, ahout 20 laciiiiae. 



lininature perianth with '^,o archegonia, mouth laciniate, laciniae ;o to 

 50 c-ells long, 2 to 4 cells witlc at tlie base. 



Malc plant simple or only slightly branched, llacid, délicate, çf bracts 

 intercalular, 10 pairs, lobe oval, apex truncale or acute, eutire or with i or 

 2 teeth, lobule oval, about half the size of lobe. 



Dimensions : Stems i to 2 inches long; diam. of stem .3 mm ; with leaves 

 4. mm. wide, leaves 2. mm. x .75 mm at base; cells .02 mm., .02 mm. 

 X o 4 mm., bracts 2. mm. X 1.25 mm , malc bracts, lobe i. mm. x .3 mm., 

 lobule .5 mm. x .3 mm. 



Hab. ; Between Kisala and Lundu (Mayombe) (D' PoMA). 



Obs : P. neckeroidea, Mitt., of which I bave seen original spécimens 

 from Kew has tviangular-oblong leaves, postical margin ampliate, distantly 

 dentate, with a large tooth near the base of leaf, smaller trigones. 



P. congoana, St., of which a very short descri]ition is given in « Sp. Hep 

 Supp. », vol. VI, p 140 (1918), is said to bave sub-liiiear leaves 3. mm long, 

 x 1.25 mm wide at the base, apex twice narrower. 



Plagiochila Naveauiana, n. sp., Pears. (Fig. X). 



Dioicum; magnitudo magna; color canoviriclis vel obscura; laxi-ca?spitosum. 



("aulis irregulariler ramosus, subdichotonius, lirnius atrobrunncus vel subniger. 



Folia patento-divergentia (70») remiita vel densa, alternata llaccida. oblonga ; membrana 

 cellularuni marginalium incrassata;' et lignescentes, niargo anterior subdecurrens. caule 

 inhaercns inter médium et lalus, nonnunquam in latert-, intégra, paleitualiter erecto, 

 nonnunquam reciirvato; margo posterior subdecurrens, cauli inhaerens inter médium 

 ad lalus ejus, incurvata prope basem, margo atque apex dentati ; dentis 2030. parvrc, 

 unicellulares ; magnitudo cellularuni média, quadrativ vel ublongo-quadrata-, quarum 

 membrana sunt firma; sine trigonibus. 



Folia inferiora plus minusve pra?sentia, parva, brevilanceolato-acuminata. 



Bracte;i' ut folia, dentés largiores, remota- a perianthus. 



Perianthus ovatus, os laciniatum. 



Dioicous; largish; pale to dark green in colour; looseh' caespitose. Stems 

 irregularly ramose, sub-dichotomous ; firm ; dark brown to black. Leaves 

 patent-divergeut (70°), distant or approximate, alteruate, Haciid, oblong, 

 marginal celî-walls thick and woody, antical margin slightly decurrent, atta- 

 chetï to stem between the middle and the side, sometimes at the side, entire, 

 usually slraight, sometimes recurved; postical margin slightly decurrent, 

 attached to between the middle and side of stem, near the base iucurved, 

 margin along with apex dentate, 20 to 30 teeth, small, one celled; cells 

 medmm size, quadrate or oblong-quadrate. walls firm, no trigones. Under- 

 leaves more or less présent, minute, shortly lanceolate-acuminate. Bracts 

 similar to leaves, theeth larger; distant from perianth. Perianth oval, mouth 

 laciniate. 



