c- m^ - ta ^ r ■ 



d T -r 'r-"-'^fi_ ■,, 



T ^k 



WOLLASTON EXPEDITION TO DUTCH NEW GUINEA. 



481 



1-75 mm. long.i, e hasl parum angusfiore, lanceolata, senslm angiistata, acuta, 

 coiicavo-carinata, subfrngilia, pelluclda, margiiiibus phrumgue histratosis vel 

 potius hl-alatis liic ilUc unistratosis, e medio folio Jcutibns scvp'ms r/emelUs, 

 gat rt3motis,brevibns, aplcem vorsiis longioi-ibus magis approximatis prteditis; 

 costa valida, apud basin circa 50 /^ lata, apicem versus dorso leniter spinuloso, 

 ill cuspidem brevem vel raucroiiein robustum, rigidum leniter denticulatum 



oxciirrens. 



/^ 



( 



poUucidis, basilares paucte tantum juxta costalos longiores, angustiores (circa 

 3x1); omnes la^vissimBe, pellucidaj. 



Dioicum vidotur. 



S 



VlSl. 



Perichaitialia lateralia, parva 



5 



paucifolia, foliis omnibus e basi ovata breviter anguste acuminatis, suberectis, 

 aurantiacis, marginibus hand limbatis, subdenticulatis; reti angustiore, 

 laxiore, e celluUs lineari-Iiexagonis haud incrassatis instructo ; costa tenuiore 

 vix excurrcnte. Arcliegonia circa 5, paraphysibus filiformibus sequllongis. 

 Seta 2-3 cm.longa, portenuis, rubra; theca saberecta, oporculata circa 3 mm., 

 deoporculata circa 1 mm. vel pauUo ultra longa, e cello angusto defluente 

 late ovata, deoperculata hemispherka, ore latissimo ; castanea, pachydermica; 

 exotliocii cellulaj irregulares, liexagonro, incrassat^c, orificium versus 2-3 

 tantum seriebus minores subrectangulares. Annulus nuUus. Operculum e 

 basi magna (circa dimidiam thecse partem instruens) 



oblique subulata. 



Endostomii membrana circa -15 mm. alta, aurantiaca, 



papillis obscnra, e 

 numerosis instructa. 



reticulationibus irregularibus transverse elongatis 



/ 



flavi, pellucidi, irregu- 



lariter nodosi, ad basin distantes, sed bic illic articulatione singula conjuncti. 

 Spori 24-30//,, laeves vel sublseves. 



Camps XIII-XI, 10,300-8075 ft., Fob. 1913. 



This remarkable plant connects the genera RUzogonium and Hymenodon 

 in an Interesting manner. Hymenodon differs from the former genus widely 

 in the foliation, and also in the peristome, which is reduced to an ondostome 

 only, oE IG narrow processes from a distinct basal membrane.^ The present 



genus has a 



'/' 



,^,^^_ fundamentally similar i)eristoine, though differing in minor 



details, hut the foliation is totally different from that of ILjnienodon,^ while 



extreniely like that of certain species of RUzogonium, such as 7? ' '^ ' 



11. medium, etc. ; the cells are, however, larger and more pellucid. 



■ A verv curious feature is the structure of the capsule, the lid forming a 



\QX\ largo proportion 



almost equatorial ; coiiseqiiently the deoperciilate capsule 



and hemisplierical. 



of the whole, so thai the line niarkin^r the orifice is 



IS 



wide-iiioutlied 



The stems are so intensely matted below with tomentum, and at the same 

 time so fragile, that it is difficult, if not impracticable, to separate them ; I 

 have not been able to detect any S flowers, and su==ppct that the plant is 

 dioicous ; the inflorescence is Indeed probably that of Ihjmenodon, 



