OSMUNDACEJE. HYMENOPHYLLACE^. 



135 



frondis oriunda cum petlunculo 7 cm. louga 1 cm. lata, (pedunculis 2^ cm. 

 lougis) recta, rarnis pauicularum 8 mm. longis oppositis augulo recto divarica- 

 tis sporangia spicatim gerentibus. Sporangia sessilia subglobosa basi latissima 

 2-valvata toto glabra. 



HAB. Nokosan. leg. U. Mom, Jan., 1903, (No. 6291). 



Near B. virginianum S\v. (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. 



Osm undaeese. 

 Os'tnnnda LINN. 

 Osmunda regalis LINN. var. ? 

 HAB. Tonkuraukei, leg. U. MORI, 1910, Aprili. 



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

 be a variety of the same. 



Hymenophyllacese. 



Ti-ichomanes SM. 



Trichomanes acuto-obtusum HAYATA sp. uov. 

 (Fig. 72). lihizoma repens filiforme. Stipes subuullus 

 vel brevissiinus vel usque 5 mm. lougus. Frons 

 cordato-ovata oblonga vel lauceolata variabillima usque 

 2 cm. louga usque 14- cm. lata apice rotundata vel 

 obtusa piuuatifida vel bipinnatifida, pinuis vel piunulis 

 lobatis, lobis ultimis oblougo-liuearibus 2-3 mm. lougis 

 1-ij mm. latis apice obtuso- 

 acutis ad summum acutis, 

 rhachibus frondium 1^-mm. 

 latis ; frons sursum sori- 

 fera ; margiue plus minus 

 vel hand imdulata plus 



minus desuper recurva, Fig. 72, Trlr.homanes acuto-obtusum HAYATA; a, the 



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

 COStis utraque pagine showing the vermiform strings; d, a sorus. 



