7 ^ 

 9- 



NEW OR INTERESTING MALAYAN FERNS 10. 



BY 



Capt. C. R. W. K. VAN Alderwerelt van Rosenburgh. 



ISOSPORE FILICALES. 

 Alsophila reducta, v. A. v. R. 



A. dubiae Bedd. affinis sed frondes minores, usque ad + 60 cm. longae, 

 pinnae maximae + 20 cm. longae, pinnulae maximae + 4—6 cm. longae 

 et cm. latae, firmiter coriaceae, margine basin oblique rotundato- 



truncatam versus subintegerrimae vel leviter sed late crenulatae, apice 

 acumiriatae et serrato-crenatae, ceterum lobato-dentatae, venae 1 — 2 utrinque, 

 sori utrinque 1-seriati, costae approximati. 



Distinct in having the stipes longer than the fronds. 



Sumatra (Bengkoelen, Lebong S.mpang, C. J. Brooks No. 298/S). 



Alsophila subulata, v. A. v. R. 



A. glabrae Hk. similis sed stipitibus basin versus pinnis reductis + 5 

 utrinque munitis et pinnulis subulatis, a basi apicem acuminatum versus 

 sensim angustatis. 



Sumatra (Bengkoelen, Lebong Simpang, C. J. Brooks No. 300/ S). 



Alsophila persquatnulata, v. A. v. R. 



A. squamuiatae Hk. affinis. — Rachides obscure rufae, subcastaneae, subtus 

 asperulae et decidue ferrugineo-furfuraceae, supra castaneo-tomentosae, 

 indumento squamis fuscis, lineari-subulatis, sat crispatis, filiformi-acuminatis, 

 castaneo-ciliatis copiose intermixto ; rachides secundariae similiter tomentosae 

 et squamulosae sed demum sat glabrescentes; pinnulae in costa supra hirsuta 

 et subtus glabra vel parce squamulosa, ceterum glabrae; venae semper 

 simplices. 



Java (Mt. Salak, C. A. Backer No. 9274). 



Alsophila amaiambitensis, v. A. v. R.; A. ramispina, Christ (non 

 Hk.), in Ann. Btz., XX, 138, p.p. 



Rachides sat atrae, subtus asperulae et decidue ferrugineo-furfuraceae, 

 supra castaneo-tomentosae et plus minusve decidue castaneo-squamulosae. 

 Pinnae petiolulatae, plus minus 45 cm. longae, sensim acuminatae. Pinnulae 

 rigide coriaceae, glabrae, infra pinnam terminalem numerosae; pinnulae 

 terminales acute triangulares, apice serrato-crenatae, basi sensim profunde 



