﻿22. DRYOPTERIS. % 1. LASTRAEA. 187 



Rhizome short-creeping; the scales few, linear-lanceolate, entire. Stipes ap- 

 proximate, 15 — 40 c.M. long, slender, slightly scaly and shorl-hairy. Fronds 

 lanceolate-oblong, 1 S — 40 c.M. long, 8 — 24 c.M, broad, acuminate. Pinnae 

 sessile, spreading, straight or falcate, acurain;ite, ± T'/j — 15 m.M. broad, 

 deeply pinnatifid nearly to the cosla, the lowest rather distant, not or not 

 much shorter, + deflexed. Lobes oblong, blunt, straight or subfalcate, approxi- 

 mate, to ± 5 m.M. broad. Texture thin; rachis naked, or hairy above; sur- 

 faces naked, or glandular beneath, sometimes setulose on the veins; costulae 

 pinnate in the lobes ; veins 4 — 6 on a side. Sori in 1 row on each side of 

 the costulae, medial or submarginal; indusium naked or minutely pilose. 



War. decipieiiiS: Fronds shorter, deltoid; pinnae rather broader. 



Wa.r. glanduligera : Rhizome wide-creeping; stipes distant. 



Malaya; Br. India ; — var. decipiens : Malacca ; Bi: -India ; — var. glandu- 

 ligera : Malacca ; Br. India, China, Japan. 



(20) D. monocloiita, C. Chr., Ind. Fil. ; Lastraea unidenlata, Bedd., 

 Handb. Ind. Ferns, Suppl., 55 



Stipes nearly 60 c.M. long, densely villose, as is the rachis, with fine 

 hair-like, jointed scales. Fronds 6') — 90 c.M. long, pinnate. Pinnae 17 '/'2 t^-M. 

 long, + 2^2 — 372 c.M. broad, cut down nearly to the costa into narrow- 

 oblong segments, which are entire or nearly so except a large tooth-like lobe on 

 one side at the base near the sinus (most prominent in the lower pinnae), 

 lower pinnae not smaller, deflexed. Texture herbaceous to subcoriaceous ; 

 costae densely strigose above, furnished beneath with long, white, weak hairs ; 

 costulae slighlly hairy on both sides; under surface covei'ed with glandular 

 dots; veins in 10 — 12 pairs, sioiple or the lower forked. Sori medial on the 

 veins; indusium persistent. 



Malacca. 



* (21) W. polytricha, ». a. ». R.; D. trichopodi, C. Chr., Ind. 

 Fil. ; Nephradium polylrickim, Bk , Journ. of Bot., XXIX, 107 ; — var. Hallieri. 



Stipes stout, 45 — 60 c.M. long, densely clothed with large, spreading, 

 lanceolate-acuminate, brown scales. Fronds lanceolale-oblong, 2-pinuatifid, 

 90 — ^^120 c M. long, + 60 c.M. broad. Pinnae lanceolate, sessile, spreading, 

 the lowest the largest, + S^^ — '^ c.M. broad, cut down to a narrow wing 

 into entire, linear-oblong segments ± 4 m.M. broad. Texture moderately 

 firm; under surface pubescent; rachis destitute of scales except a few in the 

 lower pari; veins simple, 15 — 20-jugale, distinct, arcuate. Sori nearer the 

 midrib than the edge; indusium small, fugacious. 



