^OS '??. PLATTCERnjM. § 1. EOPUTTGERIUH. 



6. Fertile fronds shorter than the barren ones, with the ultimate segments 



cuneate, dilated towards the apex. (4) P. Wandae. 



b.h. Fertile fronds longer than the barren ones, with the ultimate segments 



not cuneate, but rounded, blunt or narrowed at the apex. 



c. Fertile fronds pendulous, with about 9—20 ultimate laciniae, 



the least divided fronds rather nutant. 



d. Laciniae about 16 — 20. (b) P. sumbawense. 



il.<l. Laciniae about 9 — 15. (6) P. Willinckii. 



C.C, Fertile fronds erect, with about 4 — 8 ultimate laciniae, the 



most divided fronds rather niUant. (7) P. biforcatum. 



(1) P. grande, J. Sm., Rac, Flor. Btz., I, S6, p. p.; Hk., Fil. Exot, 

 tab. LXXXVI; Nich., Diet. d'Hort., IV, fig. 210; Bedd., Ferns Br.I., II, tab. 

 CCGXXVI; Acrostichum grande, A. Cunn., MS.; Aldcomium grande, Und., Bull. 

 Torr. CL, XXXII, 594. 



Basal fronds roundish, 40 — 90 c.M. each way, convex, deeply incised, the 

 lobes simple or once or more times forked. Fertile fronds in pairs, 100 — 200 

 C.M. long, dichotomously branched, the basal part (disk) broadly cuneate, the 

 ultimate segments broad, linear, loriform, bluntly rounded. Texture thinly 

 coriaceous; surfaces naked. Sori only 1 to each frond, occup3fing the disk 

 only, placed against the upper edge between the 2. primary fork branches. 



Malaya; Trop. Australia. 



(2) P. iraUichii, JIfc., Hk. Bk., Syn. Fil., 425; Hk., Fil. Exot, tab. 

 XCVH; Bedd., Ferns Br.I., I, tab. CVIII; Alcicornium WalUchU, Urid., Bull. 

 Torr. a., XXXH, 596. 



Near P. grande, /. Sm., but the fertile fronds shorter, 30 — 70 c.M. long. 

 Texture thick; under surface covered with a thin, yellowish or reddish to- 

 mentum. Sori 2 to each frond, occupying the secondary disks, i. e. the cu- 

 neate base of the primary fork branches, placed angaist the upper edge, 

 which is much produced in the sinus. 



Malacca. 



• (3) P. l¥ilheliiiinae Reginae, t>. A. t>. n,, BuU. Mp. 

 Agr. I. N., 1908, XVUI, 24, tab. VI— VII; Alcicomwm Wilhelminae Beginae, 

 V. A. V. R., 1. c, 25. 



Basal fronds 2 or more, large, to ± 100 c.M. each way, convex, the 



