OSMUNDACK3E. HYMENOPHYLLACE-3S. 



135 



frondis oriunda cum pedunculo 7 cm. longa 1 cm - ^^ (pedunciilis 2 cm. 

 longis) recta, ramis panicularum 8 mm. longis oppositis angulo recto divarica- 

 tis sporangia spicatim gerentibus. Sporangia sessilia subglobosa basi latissima 

 2-valvata toto glabra. 



HAB. Nokosan. leg. U. MOBI, Jan., 1908, (No. 6291). 



Near B. virginianum Sw. (EAT. Fern. North America t. 33), but differs 

 from it by the more loosely arranged lobes of the pinnules, lobes of which are 

 much more larger than those of B. virginianum, and by the much shorter 

 panicles which are on the petioles of the terminal partitions of the fronds. 



Osmundaeese. 

 Osmunda LINN. 

 Osmunda regalis LINN. var. ? 

 HAB. Tonkurankei, leg. U. Mom, 1910, Aprili. 



No fertile frond. Sterile one is a little different from the type. It may 

 be a variety of the same. 



Hymenophyllaeeae. 



Trichomanes SM. 



Trichomanes acuto-obtusum HAYATA sp. nov. 

 (Fig. 72). Rhizoma repens filiforme. Stipes subnullus 

 vel brevissimus vel usque 5 mm. longus. Frons 

 cordato-ovata oblonga vel lanceolata variabillima usque 

 2 cm. longa usque 1^ cm. lata apice rotundata vel 

 obtusa pinnatifida vel bipinnatifida, pinnis vel pinnulis 

 lobatis, lobis ultimis oblongo-linearibus 2-3 mm. longis 

 1^ mm. latis apice obtuso- 

 acutis ad summum acutis, 

 rhachibus frondium 1^-mm. 

 latis ; frons sursum sori- 

 fera ; margine plus minus 

 vel hand undulata plus 

 minus desuper recurva, 



costis utraque pagine 



Pig. 72 , Trichomanes acuto-obtusum HAYATA ; a, the 

 plant; b, a portion of a pinna; c, a portion of the same, 

 showing the vermiform strings; d, a sorus. 



