2C6 Bulletin Jakd. Bot. buitenzorq, Série lll, Vol. V, Livr. 3. 



frondes stériles liiieari-obloiigae, 4-6 cm. vel plus longae, + 1 cm. latae, 

 obtusae, apicem versus crenatae vel crenulatae, basiii versus late lobato-crenatae 

 vel lobatae, crenis integerrimis vel crenulatis, lobis crenulatis vel duplicato 

 creuulatis; frondes fertiles longiores, usque 18 cm. loiigae, iiifra médium 

 P/4 cm. latae, apicem obtusiusculum versus sensim angustatae, parte superiore 

 late. oblique truncato-deiitatae, parte iiiferiore lobatae vel piniiatifidae, lobis 

 subhorizoïitalibus, coiifertis vel subremotis, traiisverse oblongis vel semior- 

 bicularibus, maximis + '/a cm. longis, 1 cm. latis, apice rotundato-truiicatis 

 vel rotundatis et (cum apicibus dentium) subintegerrimis, repando-creiiulatis, 

 crenulatis vel duplicato-crenulatis ; costa supra prominens, subtus subprominens 

 vel deplanata ; venae in lobis maximis 3—4, furcatae vel duplicato-furcatae, 

 venulis latis, deplanatis, subhorizontalibus. Sori in apicibus dentium lobo- 

 rumque fertilium submarginales, minuti. 



The veins are placed in groups of 3-4 in tlie largest lobes, spriiiging 

 from the same point, the lowest of each group subhorizontal, the highest 

 of each group wilh the lower half running along the costa, becoming 

 gradually subhor-izontal towards the apex, each of them once or twice 

 forked, so that there are 8—16 veinlets in the largest lobes. — Perhaps a 

 local derivative of H. angiistata J. Sm. — Resembles in aspect superficially 

 Aspleniiim attcnuatuni R. Br. (Hk., Icon. PL, X, tab. Q14; Hk. & Grev., 

 Icon. Fil., tab. 220). 



Riouw Archipelago: Poeloe Toedjoeh, Mt. Ranai, in forest, 

 ait. 700 m. (H. A. B. BuNNEMElJER No: 5829, IQ May 1919). 



Humata mutata V. A. V. R. 



Enhumata. — Rhizoma longe repens, ramosum; squamae copiosae, 

 appressae, lanceolato-ovatae vel subulato-lanceolatae, brunneae, castaneae, 

 subintegerrimae, longe acutae, postremo plus minusve deciduae. Stipites 

 sparsi, 2 — 20 mm. longi, supra anguste 2-alato-canaliculati, glabri. Frondes 

 rigide coriaceae, glabrae, e basi abrupte cuneata lineari-lanceolatae, 5 — 10 cm. 

 longae, 1— 2'/2 cm. latae, lobatae ad pinnatifidae, apice acuminato, sterili 

 crenulato, fertili serrulato. Lobi horizontales, conferti vel approximati, in 

 frondibus minoribus semirotundi, in frondibus majoribus obtuse oblongi 



vel deltoideo-oblongi, mediani vel infimi maximi, 2— 9 mm. longi, 2 — 5 mm. 

 lati, stériles subintegerrimi, crenulati vel serrulati, fertiles minores repando- 

 crenati, fertiles majores serrati vel dentato-serrati ; costa supra prominens, 

 subtus subprominens vel deplanata ; venae primariae in lobis pinnatim 

 ramosae; venae secundariae suberectae, latae, deplanatae. Sori parvi, submar- 

 ginales, inter dentés solitarii.— Plantae juvéniles frondibus minoribus, sterilibus 

 subintegerrimis vel crenulatis, fertilibus irregulariter repando-crenatis, serratis 

 ad lobato-dentatis. 



Perhaps a local derivative of H. angiistata J. Sm. 



Lingga Island: Mt. Tanda, in jungle, ait. 900 m. (H. A. B. 



BuNNEMElJER No. 6900, 21 July 1919). 



