﻿10. LYGODIUM. § 1. EULYGODIUM. Ill 



* (1) E«. seniihastatiiiM, -»c*«., Hk. Bk., Syn. Fil, 437 ; ( ? L. flexuo- 

 sum, Sw., C. Chr., Ind. Fil. ; Prantl, Morph. d. Gefasscr., II, Schiz., 73). 



Primary petioles nearly or quite obsolete ; secondary ones 2 c.M. or more 

 long. Pinnae once forked; each division short-stalked, not articulate, simple, 

 ligulate or lanceolate, 15 — W c.M. long, nearly 2*/2 c.M. broad, the bases + 

 unequal, sometimes very cordate at one side. Texture papyraceous to coria- 

 ceous; surfaces naked. Spikes 3 — 8 m.M. long, in close rows along the edge 

 of the leaflets. Spores verruculose (in the Borneo-plant which I examined). 



Borneo, Philippines; Marianne Islands. 



* (2) Ia. Teysniannii, ®. a. ». R. 



Primary petioles very short; secondary ones 2 — 3 c.M. long. Pinnae forked, 

 subpinnate. Pinnulae stalked, not articulate, the lower one spreading, 1 — 2 X 

 forked again, the stalk + 3 — 10 m.M. long; the higher one 2 X forked again, 

 the stalk 1 — 2^2 c.M. long, nearly straight with the secondary petiole. Ultimate 

 segments lanceolate, 8 — 12 c.M. long, 1 — 1^2 c-M- broad, free or joined into 

 pairs, the apex narrowed, + acute, the edge serrate, the base subcordate or 

 truncate or often cuneate at the inner side when the segments are free. 

 Texture subcoriaceous; surfaces naked or slightly covered with scattered hairs 

 on the costae; upper surface ± glossy, under one opaque, rachis pale-brown 

 (when dry), slender, slightly hairy and narrowly marginate as are the stalks; 

 costae not or slightly nodulose at the base. Fertile pinnulae similar to the 

 barren, not or slightly narrowed. Spikes 1 — 4 m.M. long, contiguous. — 

 (The capsules of the 2 specimens were all unripe, and only 2 reticulated 

 spores are seen among the numerous examined undeveloped ones). 



Pulu Pisang (Teysmann Nos. 1597 & 2304). 



* (3) Wj. eircinatum, Sw,, Christ, Farnkr. d. Erde, 353; Prantl, 

 Morph. d. Gefasscr., II, Schiz., 64; L. dichotomum. Sw., Rac, Flor. Btz., I, 

 8, p. p.; Bedd , Ferns S,I., tab. LXII; — var. monstruosum, Hort. Bog.; — 

 var. denticulatum, Prantl, 1. c, 65 ; — var. cristatum. 



Primary petioles very short or wanting, secondary ones 2 — 5 c.M. long, 

 semiterete, marginate. Pinnae digitate with 5 — 6 lobes reaching down nearly 

 to the cuneate or truncate base or 2-partite with the forkings digitate. Ultimate 

 segments 10 — 50 c.M. long, 1 — 4 c.M. broad, not articulate, lanceolate or 

 linear, subacuminate, the margin bordered by a hypodermical strand (marginal 

 vein). Texture firm-membranaceous to coriaceous; surfaces naked or + hairy 

 on the costae, upper surface glossy, under one opaque; main rachis stramine^ 

 ous, the gemmiform apex clothed with pale- fuscous hairs. Fertile segments 



