OF THE ABOJi EXPEDITION \ 1911 1912. 
65 
19. Iloinalia (Brid.) Schpr. 
24. Homalia exigua Bit. jav. 
Boulders in stream-bed, with the previous species, st. (n. 36015b). 
20. Ilomaliodendron Fleisch, 
25. Ilomaliodendron llabellatum (Dicks.) Fleisch. 
Tree trunks, alt. 4,500 ft. above the head of the Egar, st. (n. 36196a). 
Tree trunk, Lalik Valley, ait. 2,700 ft., st. (n. 37335b). 
21 o Syilipliyodon Mont. 
26. Syniphyodon coniplanatus Dixon sp. nov. (Plate I, fig. 2.) 
Procerus, Icete-virens , nitidus. Caulis fron diformis, percomplanatus s 
bis-, terpinnatus, repens, ad 10 cm. longus., ramis ramulisque brevibus, 
obtusis , rigidiuscnlis . Folia laxiuscule disposita, percomplanata, lateralia 
a caule valde distantia , patula, i?nmo subrecurva, dorsalia ventraliaque 
erecta, appressa. Folia caulina e basi ovali oblonga subcultriformia, 
2mm, longa, ad ‘75mm. lata, breviter bicostata, uno margine incurvo, 
superne rotundaia , obtusa, apicem versus vel e medio folio grossiuscule 
irregnlariter , dentibus incequalibus , scepe recurvatis, dentata. Cellulco 
angustissime lineares, 50-80 /x longae, 3-5 fJL latoe, prope apicem 
paullo breviores, omnino loeves , ad infimam basin tantum latiores, ir- 
regulariter hexagono-rectangulares, alares perpaucoe, parvoe, rectangulares 
pellucuhe, pirietibus subincrassatis, Folia ramea ramulinaque minora, 
cete* umilia. Dioicus FI. S baud visi. Flores feminei medium ver- 
sus caulem insiti, bracteoe perichcetiales patuloe externoe longiuscule, 
internee breviter late acuminatoe, acutoe, omnes grosse dense dentatce. Seta 
elongata, gracilis, 3 5 — 4 5 cm. longa, parte inferiore omnino l(jevis> 
prope amcem tantum scabriuscnlum ; theca elliptica, 3mm. longa, in 
parte dimidia inferiore parce irregnlariter humiliter grosse verrucosa. 
Peristomium generis, processubus 3-4 dentium longitudinem vel supra 
cequantibus. Spori circa 15 fJL. Calyptra oeque ac operculum ignota» 
Hab. On a fallen branch of tree, watershed of Egar and Serpo, 
alt. 5,500 ft., Abor District, 23rd January 1912, leg. Burkill (n. 36208). 
A fine species, which with the next is very different in habit from 
nearly all the species known to me, in the absolutely complanate branch- 
ing, together with the form of the leaves and their dentation S. errati - 
cus (Mitt.) and Stereodon pennatulus Mitt, appear to be its only near 
allies hitherto described. The former differs in the reddish brown colour, 
more slender branching, the leaves less complanate, acute, with papillose 
upper cells, and finer marginal dentation. Brotherus places S. erraticus 
in a section with <( Kapsel mit hohen Stac-heln dicht besetzt but the 
