256 MARATTIACE.K HYMENOPHYLLACE^E. 



Marattiaeeee. 

 Archangiopteris CHRIST et GIESENHAGEN. 



Flora (1899) pp. 72-77 ; ENGLER u. PRANTL Natur. Pfl.-fam. 1-4, p. 439. 



Archangiopteris Somai HAYATA sp. nov. Rhizoma Stipes circ. 50cin. 



lono-us plus minus squamatus, squamis lanceolatis mernbranaceis 2-3 mm. longis. 

 Frons in circumscriptione ovata 40cm. longa 25cm. lata pinnata, pinnis in 

 speciinine nostro 4, pinna terminal! lanceolata 30 cm. longa 6 cm. lata apice 

 subito acuminatissima, acurnine linear! basi 3-4 mm. lato, basi obtusa, petiolulo 

 1 cm. longo, inargiue a basi usque ad prope acumen regulariter crenulata, 

 crenulis | nun. longis 1 mm. latis, ad basin acuminis clentata, dentibus ascen- 

 dentibus apice obtusis 1| mm. longis, utraque pagine glabra supra viridissima 

 subtus pallidissima, venis lateralibus simplicibus vel a basi furcatis, venulis 

 parallelis a costa circ. angulo 90 divaricatis plus minus superiore recurvis a se 

 2-3 mm. remotis simplicibus distinctis hand elevatis baud irnpressis ad marginem 

 fere attingentibus vcl prope marginem evanescentibus apice baud clavatis ; 

 textura crassiuscule herbacea vel crassiuscule membranacea ; pinnis lateralibus 

 cum terminal! conformibus sed paullo rninoribus ; pagine sub soro plus minus 

 pilosa ; costa piiime supra plana subtus plus minus elevata. 



HAB. Rahao, Dec. 1910, leg. T. SOMA. 



Resembles Archangiopteris Henry i CHRIST et GIESENHAGEN in having 

 simply pinnate fronds with linear sori ; but differs from it by the very shortly 

 stipitate pinna? with very much longer tails at the apex, and in the sori which 

 in our species are located much nearer to the costa than to the margin. Stipules 

 on the stipes or those on the pinna-petioles are not yet seen in our specimen. 

 A full description and illustration will be given in the next volume. 



Hymenophyllacese. 



Hymenophyllum LINN. 



Hymenophyllum crispato-alatum HAYATA sp. nov. Rhizoma repeus. 

 Stipes 6-10 cm. longus a basi usque ad medium teres a medio sursum alatus 

 cum alis 2 mm. latus, alis mm. latis, glaber. Frons ovato-lanceolata vel laii- 

 ceolata 14-22 cm. longa 3i-6 cm. lata apice acuniiuata basi in ambitu truncata 



