2^2 29. LIN»SAYA. § 2. EUIINDSATA. 



* (26) I^. impressa, Christ, Ann. Btz., XX, 152. 



Rhizome creeping,- brown, the scales subulate, brown. Stipes approxi- 

 mate, 5 — 20 c.M. long castaneous, firm, naked. Fronds 1 — 2 X pinnate, 

 20 — 40 c.M. long. Branches 3 — 5, sessile, erecto-patent, ±15 c.M. long, 

 + 5 c.M. broad, acuminate. Leaflets approximate, spreading, dimorphous, 

 the barren ones + 15 m.M. long. + 6 m.M. broad, sessile, ovate-oblong, 

 with the apex obtuse, narrowed, the upper and outer edge toothed or nearly 

 lobed, the lobules + serrate, the fertile ones smaller, acute, triangular, entire. 

 Texture subcoriaceous; fragile; rachis and surfaces naked; veins blackish, 

 conspicuous, deeply impressed, forked, some of them sometimes anastomosing. 

 Sori narrow, linear, continuous, occupying the upper edge of the fertile leaflets. 



Borneo. 



« (27) Ij. nat-unae, JSfc., Kew Bull., 4896, 40. 



Rhizome short-creeping. Stipes approximate, elongate, naked, pale-brown, 

 canaliculate. Fronds deltoid, + 30 c.M. long, 2-pinnate. Branches + 5 — 4- 

 jugate, 8 — 12 '/j c.M. long, 2 — 2^2 c.M. broad, lanceolate, subsessile. Leaflets 

 multijugate, close, the central ones the largest, + 5 m.M. broad, sessile, the 

 lower edge straight, the upper one lobed. Texture membranaceous; rachis 

 naked, pale-brown; surfaces naked; veins simple, distant, conspicuous, the 

 lower ones forked. Sori oblong, terminal on the lobes. — A plant found in 

 Lingga by Mr. Teysmann and which may be a form of this species has the 

 leaflets nearly close, the veins forked, the sori continuous except when inter- 

 rupted by some shallow, broad, lobe-like crenations. Branches of the fronds 

 1 — 2-jugate. 



Natuna Islands, "^Hm/g a leh t tdti 



* (28) El. longissima, Chfist, Ann. Btz., XX, 131. 



Stipes castaneous, slender, nearly glossy, naked, + 40 c.M. long. Fronds 

 to 80 c.M. long or longer, 2-pinnate. Branches distant, alternate, sessile, 

 acuminate, arcuato-nutant, + 5 — 6 below the terminal one, + 60 c.M. long, 

 2 — 2'/2 c.M. broad, pectinato-pinnate. Leaflets very numerous, close, sessile, 

 rhomboidal, obtuse, + 5 m.M. broad, the base cuneate, the lower edge + 

 decurved, the upper and outer edge* broadly lobed, tlie lobes shallow, obtuse, 

 crenate Texture herbaceous, opaque; surfaces naked; veins not conspicuous, 

 forked, some of them sometimes anastomosing. Sori few, submarginal, ter- 

 minal on the outer lobes, 2 — 5 to a pinnula; indusium greyish. 



Borneo. 



