- 18 - 

 ttlM'OltAJUI V. ./. Hinith. 



*> mi ranima cai'tiïasrMleii*. SMieis* in Engl. & Prantl, 

 Nat. Pfl-fam., I 4 , 257; Gymnograwme cartilagidens, Bk., Hk. Bk., 

 Syn. Fil. {1868), 386; Cesati, Fel. di Bor., tab. II, flg. 3— 3a: 

 Acrostichum borneense, Burck, Ann. Btz., IV {1884), 99; Elapho- 

 glossum borneense, G. Ghr., Ind. Fil., 303. 



The plants gathered in Bornéo by Dr. Nieuwenhuis and déter- 

 minée! by Christ as Gymnogramme cartilagidens, Bk., (Ann. Btz., 

 XX, 131) and those collected by Mr. Teuscher, described by 

 Dr. Burck as Acrostichum borneense are identical; the only 

 différence is that the former were ail young (however soriferous) 

 plants and the latter both young and adult. 



Rhizome short- creeping, densely clothed with small, black 



or dark-brown hairs or filtres towards the apex. Stipes approximate, 



i/ 2 — 4 cm. long, (the fertile fronds on the longest stipes in the 



fully developed plants), deciduously fibrillose at the base. Fronds 



decideclly dimorphous in the adult plants, but less so in the 



younger ones, the barren ones + 10 — 50 c - m - l° n ê'> i 2 — 3 



cm. broad, lanceolate or linear-lanceolate, narrowed gradually 



from the middle towards both ends, the apex acuminate, the 



edge oartilagineous, decoloured, densely fringed with small, car- 



tilagineous, short-oblong, bluntish or blunt, spreading or erecto- 



patent teeth or serratures in the younger or smaller forms, but 



sharply serrato-denticulate throughout or towards the base only 



in the largest or adult forms, which are not rarely subentire 



towards the apex. Texture coriaceous; surfaces naked; costa 



prominent beneath, more or less distinctly canaliculate towards 



the !:»ase on the upper side in the larger and sometimes also in 



the smaller forms; veins close, fine, simple or forkecl, connected 



by the cartilagineous edge or by fine, transversal veinlets near 



the margin. Fertile fronds longer and narrower than the barren 



ones, not rarely subsimilar to the latter in the smaller forms, 



+ 15 — 60 cm. long, 1 / 2 - ■ IV2 c - m - broad, linear-lanceolate 



or linear, narrowed very gradually towards both ends in the 



larger forms. Sori occupying the upper 1 jo — 9 /io P ai "t °f the 



fertile fronds, linear, running along the veins, reaching from the 



costa to where the veins join, at length often confluent; paraphyses 



