— n 76 — 

 Frullania platyflora, n. sp., I'kars. (Fig. I). 



Monuicuni, subiubustum . atrobruneuni, siraluosum, caulis inaequalus bipinnatis, firnius, 

 cellul;i' corlicalii' atiii coloralii-, inlerionbus cellulis majores 30 à 40 rutundaiiv. 



l'Olia paic'iilia, iiiibncala, convexa, obli)nga<ii biculai la, basis anienor, apiculalis, intégra ; 

 apex roiundaïub plerunuiue dcllevus, cclhiUv parvie, rotundaiiu vel ciuadraia», cum inem- 

 braiiis incrabsatis, iriyones lalif. I,i)l)uluslaliis,crecius,paralk-lusad caulem vcl plusminusve 

 obliquus, cylindriciis, labialu^ ad baMin. Stylus parvus, tnanf^ularis. 



l-iilla inlL-riiina ciiciicr ter caude lar};ii)ra. lala, cuneata, angulusa, margina inaequaliler 

 denlata ad leriiarn parieni bitida. 



liraclea' : lubuN ubloii^us, integrus, apiculaïus. Lubulus dimidiani parlein nun excedens, 

 lanceolalus, lacinialo denlatus. 



Bractcolus obloHgo quadratus, denlatus ad ■/; bilidus; sejjmenti et sinus acuti. 



l'enanthiis in raniis brevibus et lateralibus per niediani bracteas excedens, oblongus, 

 coniplanatus. Kacies anieriore plana Faciès posleriore plana vel plusniinusve obtusato- 

 carenata. ex circa 140 cellulis nunulus in sliaio siniplice rosiellata. Spcjfie inagna-, griseo- 

 fuscii-, verruculos;e. Rlatera siinplicia deci spirala, roseo-fuscescentia. 



FUjres (J* in raiiiis brevibus vel sessilibus, f;l'>bosi. Uraclea- pares 3. Lobus oblongus, apex 

 acutus; Lobulus tenuior. ovalis, dentatus; IJracleolus ovalis per quartem bifidus; Segnienli 

 acuti. 



Monoicous; iargish in size; dark brown in colour; stratose. Stem irres^u- 

 larly ramose, hipinnatc, lirni, cortical colis dark coloiircd, lartjer than the 

 inner, 30 to 40 round. Leaves horizontall}' inscrted, inibricate, convex, 

 oblono^, orbicular, appeiidiculate at the antical base, entire, apex rotundate, 

 often dellesed, cells small, roimdish quadate, walls thick, trigones large; 

 lobule large, erect, parallel with the steui or slightly oblique, cylindrical, 

 with a projecting lip at the outside base; stylus sniall, triaugular. Under- 

 leaves approxiniate. three tinies broader than the stem, broadly cuneate, 

 angular, margin irregularly dentate bifid to a '/s rd. Bracts, lobe oblong, 

 entire, apiculate, lobule half or rather less smaller, lanceolate, coarsely 

 laciniate-dentate; brj]Lcteole oblong-quadrate, dentate, bifid to ',3 rd., seg- 

 ments and sinus acute. Perianth on short latéral branches, projecting half 

 beyond the bracts. oblong, coniplanale, sniooth antical side plane, postical 

 plane or sliglitly obtusely keeled, composed of a singler laver of about 

 140 thin cells; rostellate; spores large, greyish-brown, verruculose; elaters 

 single spiral of about 10 turns, reddish-brown. verruculose; cl tiers single 

 spiral of about 10 turns, reddish-brown. Maie llowers on short latéral branches 

 or sessile, globose, 3 pairs of bracts, lobe oblong, apex acute, lobule rather 

 smaller, oval, dentate; bracteole oval, bilid to 'i\ th., segments acute. 



Dimensions : Stems i to 2 inches long; .2 mm. diam.; with leaves 1.5 mm. 

 to 1.75 mm. wide; leaves .75 mm. X 75 mm , i. mm. x .75 mm.; cells 

 .02 mm ; lobule .4 mm. X .2 mm.; underleaves .6 mm. X .6 mm., seg. 

 .25 mm.; bracts, lobe, 1.25 mm. x .9 mm., lobule .8 mm. X .4 mm.; 

 bracteole .7 mm. X .5 mm., segm. .3 mm.; perianth 1.75 mm. X .1 mm.; 

 spores .05 mm.; elaters .15 mm. x .02 mm.; maie bracts, lobe .6 mm. 

 X .4 mm., lobule .4 mm. x .4 mm. 



Hab. : Amongst orchid roots, in themountains near Nandia, Ituri. 4-X-16 

 (M. Lacomhi.Èz). 



Obs. : This Frullania which belongs to the section Galeiloba of Stephani 

 {Trachycolea, SPRi'CE), in which the perianth is triplicate, or rarely pluri- 

 plicate, is remarkable iu having a complanate perianth, or only rarely slightly 

 obtusely keeled on the postical side; no species having this character is 

 recorde'd from .Africa by Si'EPH.^Nl. 



Since describing tiie above species I find there is already another speeies 

 published which bas a flattened perianth, Frullania deplaimta, MiTTEN, 

 from .A.ustralasia, it is however différent in its other characters. 



