18. DAVALLIA, LEUCOSTEGIA. 91 



14. D. (Leucos.) membranulosa, Wallich ; rhizome stout, wide-creeping, densely 

 clothed with lanceolate pale-brown scales ; St. 2-3 in. 1. ; fr. 6-9 in. 1., 2-3 in br., 

 lanceolate, once fully pinnate, but the main rachis slightly winged above ; lower 

 pinnae lanceolate, 2-3 in. 1., |-in. br., cut down to a narrowly- winged rachi&inlQ . 

 numerous sharply-toothed oblong segments ; texture thinly herbaceous ; sori 

 2 to 8 to a segment, obliquely placed between the costa and margin. Hk. Sp. 1. 

 p. 159. t. 53. A. 



Hab. Himalayas of Nepaul, Kumaon, and Bootan. 



15. D. (Leucos.) immersa, Wallich; rhizome hypogseous, wide-creeping, stout, 

 fibrillose ; st. 4-8 in. 1., strong, erect ; fr. 12-18 in. 1., 6-9 in. br., deltoid, tripin- 

 nate ; lowest pinnl. lanceolate-deltoid, 2-3 in. 1., 1 in. br., with broad segm., 

 which are obliquely truncate at the base below, and roundly lobed, with the 

 lobes again crenate above ; texture herbaceous ; sori large (1 lin. br.), 1 to 6 

 to a segment, oblique. HTc. Sp. 1. p. 156. Fil. Ex. t. 79. Cyst, dimidiata, 

 Dec. 



Hab. Hindostan, ascending on the Himalayas to 6-8,000 ft., Malayan Peninsula and 

 Java. By its subdimidiate segments this connects Leucostegia with Odontoloma ; it is 

 also peculiar in having the rhizome developed beneath the surface of the soil. 



16. D. (Leucos.) multidentata, Hk. MSS. ; rhizome stout, wide-creeping, scaly; 

 st. 4-6 in. 1., stout, clothed below with large ovate-lanceolate pale-brown scales ; 

 fr. 2-3 ft. 1., 1 ft. br., ovate-deltoid, bipinnate ; pinnl. of the lower pinnce 2-3 in. 

 1., 1 in. br., deltoid-lanceolate, acuminate, cut down to a narrow rachis with 

 deeply inciso-pinnatind ovate-oblong lower segm. ; texture herbaceous ; sori 

 2 to 12 to a segment, placed at the base of its teeth on the upper side of 

 the central vein. Aspidium multidentatum, Wall. Cat. 346. Aero. Thomsoni, 

 Moore. 



Hab. Himalayas of Nepaul, Sikkim (5-7,000 ft.), Assam, &c. 



17. D. (Leucos.) pulchra, Don; rhizome thick, creeping, densely clothed with 

 lanceolate bright-brown scales ; st. 2-6 in. 1., erect, scaly below ; fr. 6-9 in. 1., 

 2-4 in. br., lanceolate- deltoid, tri- or quadripinnate ; lower pinnl. deltoid, their 

 lobes cut down to the rachis into very narrowly linear sharp-pointed segments ; 

 texture subcoriaceous ; sori copious, broader than the segments, placed at the 

 ultimate forks. Hk. Sp.l.p. 160. 



Hab. Himalayas of Khasia and Sikkim, up to 11-12,000 ft. An elegant plant, with 

 all the copious divisions very narrow. 



18. D. (Leucos.) falcinella, Presl; rhizome creeping, thickly clothed with 

 purplish-black rigid hairs ; st. 2-3 in. 1., erect ; fr. 4-6 in. 1., 3-4 in. br., deltoid, 

 tri- or quadripinnatifid ; main rachis slightly winged ; lowest pinnce unequal- 

 sided, deltoid ; pinnl. oblong, cut down nearly to the rachis with segments 

 which are again deeply toothed, ultimate divisions of the fertile frond falcate 

 mucronate, of the barren frond rather broader and not so sharp ; texture sub- 

 coriaceous ; sori 2 to 6 to a lobe, placed at the base of the teeth. HTc. Sp. 1. 

 p. 159. 



Hab. Philippine Islands. This would perhaps be better placed amongst the deltoid 

 Eudavallice, "with which it agrees in habit. 



19. D. (Leucos.) Novce Zelandice, Colenso ; rhizome creeping, clothed with 

 filiform scales ; st. 4-8 in. 1., firm, erect ; fr. 12-18 in. 1., 4-8 in. br., deltoid, 

 tripinnate ; lower pinnl. deltoid-lanceolate, cut down to the rachis, except 

 towards the apex, into narrow deeply pinnatifid acute segments ; texture sub- 

 coriaceous ; sori numerous, placed on the teeth of the segments. Hk. Sp. 1. 

 p. 158. t. 51. B. Gard. Ferns, t. 51. Acrophoius hispidus, Moore. 



