﻿708 77. PLATYCERIDM. § 1. EUPLATYCERIUM. 



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



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



b.b. Fertile fronds longer than the barren ones, with the ultimate segm^ents 



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



c. Soriferous segments involute, the sori thickened with a dense tomen- 



turn giving them a corky appearance. (5) P. sumbawense. 



c.c. Soriferous " segments not involute, the sori not thickened, not corky. 



d. Barren fronds i, fertile 3, pendulous. (6) P. Willinckii. 



d.d. Barren fronds 2 or more, fertile 4 — 7, erect or nutant, but 



not decidedly pendulous. (7) P, bifurcatum. 



(1) P. grande, J. ««»., Rac, Flor. Btz., I, 56, p.p.; Hk., Fil. Exot., 

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

 CCCXXVI; Acrostichum grande, A. Cunn., MS.; Alcicornium grande, Und., Bull. 

 Torr. CI., XXXII, S94. 



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, dicholomously branched, the basal part (disk) broadly cuneate, the 

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

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

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



Malaya; Trop. Australia. 



(2) ■». H^allichii, Jl»., Hk. Bk., Syn. Fil., 425 ; Hk., Fil. Exot., tab. 

 XCVII; Bedd., Ferns Br.I., I, tab. CVIII; Alcicornium WalUchii, Und., Bull. 

 Torr. CI., XXXII, 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, ». A, «. «., Bull. D^p. 

 Agr. I. N., i908, XVIII, 24, tab. VI— VII; Alcicornium Wilhelminae Reginae, 

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



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



