ASIMMK.T: — MKNISCII M. 33 



I)iiinulcs, herbaceous, slij^litly inihcsccnt on tlie veins beneath; areolae 5 to 

 9 between cost;i ami inar;,'iii. 'Jlie simple form is M. simplex Hooker. 



Isabela-Luzoii, WUrlitirii llCiOi); i.cyte, Cumiuy 201); Nejjros, Cope- 

 land 76. 



India to Java and Formosa. 



(2) M. cuspidatum Blumc. Stipe 30 to 100 cm. high, brownish, 

 naked; frond 40 to 100 cm. high, with few scattered pinna>, the terminal 

 like the lateral; pinna; erccto-patent, about 1.5 cm. long by .'5 cm. broad, 

 caudate-acuminate, usually falcate at the end, nearly entire, short stalked 

 or sessile, subcoriaceous, glabrous or nearly so, dark green above, with rows 

 of light or reddish dots marking the e.\current veinlets. This species 

 is very near ycphrodium iiroplii/llum, but must be specifically distinct 

 even if the genera were unilcil. 



Luzon, Cuming 178; Mount Mariveles, Whitford 272; Leyte, Cuming 

 314; Mindoro, Cuming 301. 



Himalayas, Java. 



(0) ASPIDIUM Swartz. 



Fertile and sterile fronds alike or nearly so, inclined toward a triangular 

 shape, and the pinnae toward a stronger development of the basiscopic 

 side; texture moderately thin; veins anastomosing irregularly, usually 

 very copiously, with or without free included veinlets; sori nearly always 

 round, on a distinct receptacle; indusiiun peltate, reniform or wanting. 

 An almost exclusively tropical genus of terrestrial ferns, whose greatest 

 development is reached in this region; intimately related, through Pleocne- 

 mia, to Xephr odium. The most of our species seem to be of very local 

 occurrence, and nut oven locally abundant: the number of species still 

 to be discovered is therefore probably large. The arrajigement of the 

 species adopted here is probably artificial, and it is therefore undesirable 

 to raise any of these groups (unless it be Pleoonemia) to generic rank. 



1. Veins anastomosing very copiously. 

 2. Indusium wanting, Arcypteris. 

 3. Fronds simple. 



4. Lowest lobes entire (1) A. Bryanti 



4. Lowest lobes forked or lobed (2) .4. Barberi 



3. Fronds pinnate. 



4. Sori in rows along main veins. 



5. Pinn.T? mostly entire (2) A. Barberi 



5. Pinna} pinnatifld (3) .4. macrodon 



4. Sori strictly marginal (4) .4. Brogniartii 



4. Sori scattered. 



5. Pinnre entire or once forked (5) .4. Jamaocnse 



5. PinniB pinnately lobed. 



6. Veinlets inconspicuous (6) .4. difforme 



6. Veinlets very conspicuous 



above (7) .4. Whitfordi 



2. Indusium reniform, Saflcnia. 



3. Sori in rows along main veins. 

 4. Frond not compound. 



5. Rhizome erect (8) .4. heterodon 



5. Rhizome creeping {9) A. decurrens 



2403G -A 



