- 61 ~ 



s. Pinnulae mostly thin or weak. 



t. Pinnulae abruptly subcaudaie-acuminate. 



(30) A. olivacea. 

 tt. Pinnulae as a rule gradually acuminate 

 or acute. 



u. Recurrent venules rather pellucid. 



(31) A. grisea. 

 uu. Recurrent venules absolutely impellucid. 



(24) A. subfurfuracea. *) 

 S5. Pinnulae mostly thick or firm 



t. Veins beneath at length commonly dark, 

 a. Recurrent venules not very distinct. 



(28) A. arborescens. 

 au. Recurrent venules mostly conspicuous. 



(32) A javanica. **) 

 tt. Veins beneath mostly pale. 



a. Pinnulae to + Vj^ cm. broad. 



(33) A. crassifolia. 

 uu. Pinnulae at least + /'/s broad. 



V. Pinnulae pale. (34) A. Miqueliana. 

 vv. Pinnulae dark. (35) A. evecta. 



LECANOPTERIS, Blume. 



The genus Lecanopteris, which, by the very peculiar habit and 

 arrangement of the sori, has so much attracted the attention of all who 

 have set eyes on it, has also particularly interested me. 



After the 2 species (forms) so correctly drawn by Blume's artist (except 

 the rhizome) several others have been found, which, by the incomplete 

 diagnoses and (or) incorrect determinations of later authors (including me 

 too) have much contributed to cause a confusion which makes a correct 

 determination of the present known species and forms difficult though not 

 impossible. 



Now, after having seen a living specimen of one of the species and 

 having opportunity to examine, with the exception of 3 species, sufficient 

 though not abundant materia! of several species or forms, I hope to be 

 able to kindle somewhat more light in the present confusion and to 

 correct my treatment of this genus in the Supplement to ray Malayan 

 Ferns and Ferns Allies printed nearly a year ago. 



*) Includinu A. mutata . 



**) Including A . Hartingtana. 



