22. CR-i'OPTEEIS. § 1. LASTREA. 173 



towards the base with long, filiform, bright-brown scales. Fronds large, 

 deeply 4-pinnatifid. Pinnae + 25—35 cm. long, + 10 — 15 cm. broad. 

 Segments entire or subentire, rarely toothed or incised again, ± 2 — 3 

 mm. broad. Texture herbaceous; rachises and costae tomentose above 

 with reddish-brown fibrils, whether or not sparingly so beneath; upper 

 surface more or less sparingly fibrilloso-pilose, often nearly naked ; costae 

 more or less scaly beneath, the costulae occasionally so; veins simple or 

 forked, naked or minutely appresso-pilose beneath. Sori medial or 

 inframedial on the veins; indusium thin, fugacious. 

 Trop. Asia, China, Japan. 



§ 2. NEPHRODIUM. 



(63) O. Bakeri, Copel.; — var. acrostichoides ; D. cliversiloba, 

 Christ, var. acrostichoides ; Christ, in Philipp. Journ., IF, 200 ; D. canescens, 

 C. Chr., var., C. Chr., Ind. Fil. ; Nephrodium acrostichoides, J. Sm., in 

 Journ. of Bot., Ill, 411; Aspidium canescens, Christ, forma acrostichoides, 

 Christ, in Ann. Btz., XV, 130 — 131; — var. incana; D. canescens, C. Chr., 

 var. incana, Rst., in Fed., Rep., XII, 530. 



War. acrosticlioifles : Barren fronds 2'/2 — 5 cm. broad; pinnae 

 close, the lower rather horizontal, the central linear-oblong, to 2'/2 cm. 

 long and 1 cm. broad, obtuse, subentire, truncate or cordate at the base ; 

 veins 2—3 on a side, the 1 — 2 lower anastomosing. Fertile fronds on 

 stipes to 11 cm. long; pinnae remote, smaller, contracted. Sori crowded, 

 in I — 2 rows on each side of the costae; indusium distinct. 



War. iiicaua: Lower pinnae of fertile fronds dilated or hastate 

 at the base, nearly naked. — Neio Guinea. 



(63a) B>. sessilipinna, Copel., in Philipp. Journ., VF, 145. 



Rhizome creeping, woody. Stipes close, 5 — 15 cm. long, minutely 

 pubescent, provided with scattered, suddenly much reduced (rudimentary) 

 pinnae. Fronds + 12 — 20 cm. long, 4 — 5 cm. broad, pinnate, the upper 

 half pinnatifid, gradually long-acuminate. Pinnae sessile, the lowest 

 deflexed, the higher approximate, + 8 mm. broad, rounded at the apex, 

 cut '/j — '/i"'^^'^y down to the costa, truncate at the base. Lobes truncate. 



