64 1C. IIYMENOPHYLLUM. 



segments ; invol. as broad as the segments, divided about halfway down ; valves 

 rounded, strongly ciliated. Hk. Sp. 1. p. 98. t. 33. D. 



Hab. Oahu, Sandwich Islands. 



36. H. ceruginosum, Carm. ; st. 1-2 in. 1., slender, tomentose ; fr. 2-3 in. 1., 



1 in. or less br., lanceolate or ovate-acuminate, tripinnatifid ; main rachis winged 

 above ; pinnce often much imbricated, the lower ones flabellate or broadly 

 rhomboidal in outline, divided down nearly to the rachis into simple or slightly 

 pinnatifid linear segments, the surface and margin clothed copiously with 

 pubescence ; sori 2 to 12, terminal on the segments ; invol. small, divided nearly 

 down to the base ; valves rounded and densely ciliated. H. aeruginosum, a, Hi: 

 Sp. 1. p. 93. 



Hab. Island of Tristan d'Acunha. 



37. H. lanceolatum, Hk. & Arn. ; st. 2-3 in. 1., slender, wiry, naked; fr. 3-6 

 in. 1., 1-2 in. br., lanceolate or oblong tripinnatifid ; main rachis slender, wavy, 

 flexuose, winged only at the very top ; lower pinnce 1-2 in. 1., rhomboidal-oblong, 

 cut down nearly to the rachis into several simple or forked long linear segm. on 

 both sides, hairs few, mostly confined to the midrib and margin ; sori 2 to 8 to 

 a pinna, placed at the side or top of the lateral segments ; invol. divided more 

 than halfway down; valves rounded and copiously ciliated. Hk. Sp. I. p. 94. 

 t. 34. B. 



Hab. Islands of the Sandwich group. 



38. H. subtittisimum, Kunze. ; st. 1-3 in. 1., wiry, erect, tomentose ; fr. 3-8 

 in. 1., 1^-2 in. br., ovate-lanceolate, tripinnatifid ; main rachis slightly winged 

 above ; lower pinnce spreading, divided down nearly to the rachis into numerous 

 alternate pinnl., which are again deeply divided into broad linear segm., the sur- 

 face and margin clothed copiously with tawny silky stellate pubescence ; sori 



2 to 12 to a pinna, terminal on the lateral segments ; invol. divided down nearly 

 to the base ; valves rounded and copiously ciliated. H. seruginosum, /?, Hk. 



Sp. 1. p. 93. t. 34. A. H. Berteroi, Hk. Sp. 1. p. 93. t. 33." C. H. Frank- 



linianum, Colenso. 



Hab. New Zealand, Chili, Chiloe, and Juan Fernandez. 



39. H. hirtettum, Sw. ; st. 1-4 in. 1., tomentose, not winged ; fr. ovate-acumi- 

 nate, tripinnatifid, 3-6 in. 1., 2-3 in. br. ; main rachis only slightly winged above, 

 tomentose ; lower pinnce rhomboidal-lanceolate, with a narrow central undivided 

 portion ; lower pinnl. pinnatifid, with long narrow linear ciliated segments ; sori 

 2 to 12 to a pinna, placed at the end of the lateral segments on both sides ; invol. 

 orbicular, sunk in the frond, divided about halfway down ; valves strongly 

 ciliated. Hk. Sp. Fil. 1. p. 90. t. 31. D. 



Hab. Mexico, Jamaica, and Guadeloupe. Frond elastic in texture. This and the 

 next four species closely resemble one another in the shape of the frond, and the extent 

 to which it is divided. 



40. H. elasticum, Bory ; st. 2-4 in. 1., wiry, erect, naked or slightly tomentose; 

 fr. 6-12 in. 1., 2-4 in. br., ovate-acuminate, tripinnatifid ; main rachis winged 

 above, tomentose ; lower pinnce rhomboidal-triangular, 1-3 in. 1., divided down 

 very nearly to the rachis into numerous alternate pinnl., which again are cleft 

 very nearly to the rachis into long linear simple or forked segm. ; texture firm 

 but elastic, moderately hairy both over the surface and at the margin ; sori very 

 numerous, terminal on the lateral segments ; invol. small, the base sunk in the 

 frond ; valves rounded, free, very hairy. Hk. Sp. 1. 93. Hk. & Gr. Ic. 

 Fil. t. 135. H. hygometricum (Pair.} oldest name. 



