90 18. DAVALLIA, LEUCOSTEGIA. 



texture coriaceous ; veins prominent ; sori small, placed at the base of the small 

 teeth. Mett. Fil. Nov. Cal. No. 73. 



Hab. Aneiteum and New Caledonia. Near D. alpina, but the teeth of the fertile 

 fronds much sharper. 



segm. of all, except the lower pinnae, blunt, scarcely toothed; lobes of the 

 fertile pinnae narrower, sharper toothed ; of the lower ones deeply so ; texture 

 coriaceous ; sori placed on the teeth of the segments. Hk. Sp. 1. p. 156. I. 41. C. 

 D. bipinnatifida, Blume, Hk. 1. c. 



Hab. Java and Ceylon. Probably a mere variety of pedata. 



10. D. (Hum.) Cumingii,'Kk. ; rhizome creeping, scaly ; st. 3-4 in. 1., both it 

 and the rachis rather scaly ; sterile fr. about 1 in. each way, deltoid-cordate, cut 

 down nearly to the rachis ; upper pinnae blunt, slightly toothed, the lower pair 

 deeply pinnatifid below ; texture coriaceous ; fertile fr. 4-5 in. 1., 3 in. br., the 

 same shape, but much more divided; lowest pinnl. deeply pinnatifid with sharply 

 toothed lobes ; sori placed in the teeth of the segments. Hk. Sp. 1. p. 155. 

 t. 45. B. D. longula, Kunze. 



Hab. Philippine Islands. 



11. D. (Hum.) botrychioides, Brack. ; rhizome wide-creeping, scaly ; st. 3-5 in. 

 1., scaly below ; fr. 6-8 in. 1., 3-5 in. br., deltoid in general outline, decidedly 

 dimorphous, the barren ones with a narrowly- winged rachis ; lowest pinnce cut , 

 down nearly to the rachis, with deep bluntly-toothed segments ; fertile pinnce 

 much more finely divided ; pinnl. of the lower pinnae cut down to a narrow 

 rachis with narrow sharply-toothed segments almost covered with sori. Brack, 

 t. 32. fig. I. 



Hab. Aneiteum and Fiji Islands. 



12. D. (Hum.) Imrayana, Hk. ; rhizome wide-creeping, paleaceous ; st. 4-8 in. 

 ]., erect, brown or black, naked, polished ; fr. 6-12 in. 1., 4-6 in. br., ovate, once 

 pinnate ; pinnce 7 to 15, the largest about 3 in. 1., 1 in. br., lanceolate, with broad 

 blunt teeth, somewhat unequal-sided and obliquely truncate at the base below ; 

 texture herbaceous, both surfaces naked ; sori placed in the teeth at a short 

 distance from the margin ; invol. rounded, broader than deep, attached by the 

 base only.///?;. Sp. 1. p. 171. t. 49. A. 



Hab. Dominica, Guadeloupe, and Guiana. 



Leucostegia. Invol. attached as in Humata, but smaller, narrower, and 

 thinner. Sp. 13-24. Pinnules uniform on the lower and upper side, fronds 

 various in size and texture, with one exception tri- or quadripinnatifid or pinnate, 

 mostly inhabiting Polynesia and tropical Asia, several extending to the Himalayas, 

 some to New Zealand, but none either to Africa or America. Acrophorus of Moore 

 includes this and Odontoloma. 



13. D. (Leucos.) hymenophylla, Baker; rhizome creeping, scarcely scaly ; st. 

 slender, 3-4 in. in 1. ; fr. flaccid, 6-9 in. 1., 4-6 in. br., deltoid, cut down to the 

 rachis below, but not above ; lower pinnce distant, the lowest pair broadest and 

 most deeply cut on the lower side ; lowest pinnl. reaching down nearly to the 

 rachis, toothed more than halfway down, with oblong blunt crenate lobes ; 

 texture membranous ; sori few, marginal in the crenations. Acrophorus hymeno- 

 phyllus, Bedd. Fil. Brit. Ind. t. 96. D. Parishii, edit. 1. 



Hab. Limestone rocks, Moulmein, Rev. C. S. Parish. A very distinct species. 



