﻿45a. PTERIS. § 1. EUPTERIS. b. PINNATAE, 35B 



point acuminate, the sides ± parallel, the base broadly cuneate, often slight- 

 ly unequal-sided, the edge entire, bordered by a continuous, narrow, ± pellu- 

 cid line, the stalks 1 — 40 m.M. long. Texture coriaceo-chartaceous when dry; 

 rachis and both surfaces naked; upper surface glossy, lower pale, opaque; 

 veins numerous, simple or forked, the tips dilated and often confluent. Fer- 

 tile fronds with the pinnae linear, acuminate, 5 — 8 m.M. broad when simple, 

 the base cuneate; higher pinnae simple, the lower with a long, terminal seg- 

 ment and 1 — 5 distant, linear lobes near the base on the upper side, the lower 

 side undivided or rarely lobed like the upper. Indusium membranaceous. — Besides 

 both barren and fertile fronds there are semi-fertile ones, which have the 

 pinnae broad or naiTow, simple or forked at the base with stalked segments, 

 the sori often interrupted into many shorter, oblong ones. — Pt. Dalhousiae, 

 Hk. is quite another plant. 

 Java. 



* (3) Pt. orientaliis, v. A. ». It. 



Stipe and rachis reddish or purpureous, deciduously villose, at length 

 naked. Fronds + 40 — 55 c.M. long, + 30 c.M. broad in the broadest part. 

 Pinnae in + 20 — 30 pairs below the terminal one, simple, linear, erecto- 

 patent, sessile, close or imbricate, the lowest largest, or a little smaller 

 than the next higher ones, 15 — 25 c.M. long, 1 — 2 c.M. broad near 

 the base, narrowed gradually towards the apex, the point somewhat bluntish, 

 the margin entire or serrate in the barren pinnae, often crispate, the base 

 rounded, the highest pinnae the smallest, 5 — 15 c.M. long. Texture coriaceo- 

 membranaceous, pellucid; costae prominent and rounded beneath; veins fine, 

 numerous, close, not very oblique, not rarely nearly horizontal, deciduously 

 and sparingly pilose on both sides, at length naked. Sori long; indusium 

 narrow. — The description is taken from specimens determined as Blechnum 

 orientale, L. probably by the resemblance with that species. 



Banda Islands (Treub). 



* (4a) ff»t. longifwlia, i., Rac, Flor. Btz., I, 151 ; Bedd., Ferns 

 S.L, tab. XXXIII; — var. diversifolia, Rac, 1. c. ; Pt. diversi folia, Sw., Syn., 

 96, 288. 



Rhizome short, the scales yellowish, linear-lanceolate. Stipes clustered, 

 10 — 30 c.M. long, erect, pale-green, more or less clothed towards the base 

 with pale scales. Fronds 10 — 100 c.M. long, 5 — 20 c.M. broad, simply pin- 

 nate, oblong or lanceolate. Pinnae sessile, linear, the central ones the longest, 



