﻿196 22. DRYOPEERIS. § 1. LASTRAEA. 



Stipes to 1 1 c.M. long, stramineous like the rachis, the base clothed with 

 scattered, cystopteroid, lanceolate, ferrugineous, acuminate scales to 5 m.M. 

 long. Fronds 7 — 10 c.M. long, 6 — 7 c.M. broad, triangular-ovate, acuminate, 

 2-pinnatisect. Pinnae ereclo-patent, petiolate, the lowest subopposite, trian- 

 gular-ovate. Secondary segments oblong with a broad base, obtuse, entire or 

 pinnatifid, the apex obscurely crenate. Texture membranaceous, thin; colour 

 bright-green ; both surfaces densely pilose ; veins free, forked, reaching the 

 sinuses of the crenations. Sori roundish, in 2 rows on the ultimate segments 

 indusium membranaceous, pale-coloured, setose and ciliate; sporangia naked; 

 spores globose or ovate, smooth. 



Timor. 



* (42) D. disiscct££, O. Ktxe, C. Chr., Ind. Fil.; Aspidium dissec- 

 tum, Christ, Ann. Btz., XV, 136; Lastraea dissecta, Carr., Bedd., Handb. Ind. 

 Ferns, 260 ; L. membrani folia, Bedd., Ferns S.I., tab. CII ; Nephrodium dissec- 

 turn, Desv., Hk. Bk., Syn. Fil., 282, p.p. ; N. conjugalum, T. ^ B., MS. in 

 Hc/b. Bog. 



Rhizome erect. Stipes to 30 c.M. long or longer, + scaly at the base. 

 Fronds deltoid to ovate, 30—150 c.M. long, 15 — 90 c.M. broad, pinnate. 

 Higher pinnae 15 — 25 c.M. long by 3'/^ c.M. broad, pinnatifid ^/j towards the 

 costa; lower pinnae pinnate, some of the lower basal pinnulae stalked, much 

 elongated, deeply pinnatifid, and similar to some of the upper primary 

 pinnae. Ultimate segments crenulate. Texture herbaceous; upper surface hairy 

 with scale-like hairs, under one naked or also hairy; veins forked. Sori 

 terminal on the anterior veinlets, forming a single row on each side near the 

 margin ; indusium reniform, naked. — Fertile portions of the fronds not rarely 

 more or less contracted. 



Malaya; Polynesia, Trop. Australia, ISorth. India, Madagascar. 



« 



(43) D. papuana, C. Chr., Ind. Fil.; Nephrodium dissitifolium, Bk., 

 Kew Bull., d899, 120. 



Stipes naked, glossy, pale-brown. Fronds lanceolate-oblong, 3-pinnate 

 45—60 c.M. long. Pinnae lanceolate, the lowest largest, short-stalked, 10 — 13 

 c.M. long. Pinnulae ovate-oblong, sessile, obtuse, the base cuneate, pinnatifid 

 or pinnate. Segments obtuse, erecto-patent. Texture subcoriaceous ; rachis 

 naked, slender, pale-brown; veins pinnate. Sori in 1 row on each side of the 

 costae, not contiguous; indusium naked, fugacious. 



New Guinea. 



