18. DAVALLIA, §§ LEUCOSTEGIA. 91 



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

 clothed with lanceolate pale-brown scales ; st. 2-n in. 1. ; fr. 6-9 in. 1., 2-3 in hr. 

 lanceolate, once fully pinnate, hut the main rachis slif,^htly winged aliove ; lower 

 pinnce lanceolate, 2-3 in. 1., \-m. hr., cut down to a narrowly-winged rachis into 

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

 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 hj^poggeous, wide-creeping, stout, 

 fibrillose ; st. 4-8 in. 1., strong, erect ; fr. 12-18 in. 1., (j-9 in. hr., deltoid, tripin- 

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

 ■whicli 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. — Hk. Sp. I. p. 150. Fil. Ex. t. 79. Cyst, dimidiata, 

 Dec. 



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

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

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



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

 St. 4-0 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 low ev pinnce 2-3 in. 

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

 deeply inciso-pinnatifid 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. Clarkei, Baker ; rhizome stout ; scales dense, large, lanceolate, ferru- 

 ginous; St. \-h ft., stramineous, slender, slightly scaly near base; />'. deltoid, |-| ft. 

 1., 3-4-pinnatitid ; pinnce subdistant, stalked, lowest largest, lanceolate or deltoid, 

 1-2 in. br. ; pinnl. deltoid : ult. divisions few, spaced, ligiilate, acute, ascending, 

 one-veined, \-\\ lin. 1. ; texture membranous ; surfaces bright green, naked ; sori 

 minute, round, placed at base of ultimate lobes ; inv. pale, membranous, broader 

 than deep. Acrophorus Hookeri, Moore. D. pulchra, edit. 1. ex-parte. 



East Himalayas, 8-19,000 ft. Hk. fil. d: Thomson, Clarice. 



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

 purplish-black rigid hairs ; st. 2-3 in. 1., erect ; fr. 4-0 in. 1., 3-4 in. br., deltoid, 

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

 sided, deltoid ; j?innl. 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. — Hk, 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. Acrophorus hispidus, Moore. 



