43. ASPIDIUJI, § POLYSTICHUM. 255 



densely scaly below ; fr. 1-3 ft. 1., 12-18 in. br., subdeltoid ; lowest pinnce tbe 

 largest, (5-12 in. 1., 8-4 in. br. ; pinnl. and segm. lanceolate, the latter blunt iy 

 lobed, the teeth not mucronate ; texture very coriaceous ; radns strong, polislied ; 

 both surfaces naked ; veins iniinersed, pinnate ; sori 1 lin. br., in two rows 

 filling nearly the space between midrib and edge. — Polyp. L. A. coriaceum, 

 Sw. Hi: Sp. 4. p. 3-2. 



Hab. America, from Cuba to Patagonia ; Polynesian Islands, New Zealand, and 

 Australia ; Cape Colony, Natal, Mascareu Isles. 



3.3. A. (Po]yst.) flexutn, Kunze ; rM~ome siout, wide-creeping; .?'. scattered, 

 1 ft. 1., deciduously scaly ; fr. 2-3 ft. 1., 9-12 in. br. ; lower pinnce lanceolate- 

 deltoid, fi-9 in. 1., 4-0 in. br. ; pinnl. lanceolate-deltoid, cut down to the rachis 

 below into oblong bluntly-lobed segm. -|- in. 1., |^-| in. br. ; texture coriaceous ; 

 teeth not awned ; veins beneath prominent ; under surface and rachises scaly ; 

 sori large, in two rows, occupying nearly the space between edge and midrib. — 

 A. Berteroanum, Colla. Hk. Sp. 4. p. 33. t. 22'j. 



Hab Juan Fernandez. — Closely allied to the preceding, from which it is distinguished 

 by its furfuraceous rachis and under surface. 



34. A. (Polyst.) Seemanni, Hk., ; st. stout, erect, the upper part naked ; fr. 

 18-24 in. 1., 1 ft. br. ; jnnnce lanceolate, G-8 in. 1., 2-2i in. r)r. ; pbinl. distant, 

 suldanceolate, unequal-sided, 1-]| in. 1., |-f in. br., bluntly lobed, the lower 

 lobes reaching down nearly to the rachis ; texture coriaceous ; rachises and both 

 surfaces nearly naked ; midrib of the lobes prominent ; sori 4-G in each. — Hk. 

 Sp. 4, p. 34. t. 230. 



Hab. Panama, Seemann. — "Very near the two preceding. 



35. A. (Polyst.) ascendens, Hew. ; rhizome wide-climbing ; st. 1 ft. I., straw- 

 coloured, polished, nearly naked ; fr. 2-3 ft. 1., 1 ft. br., dimorphous ; lower 

 pinnce of barren fr. subdeltoid, 6-9 in. 1., 3-4 in. br. ; pinnl. lanceolate-deltoid ; 

 segm. stalked, ovate-rhomljoidal, cut down to the rachis in the lower part and 

 lobes acutely, not deej)ly toothed ; texture coriaceous ; rachis and both surfaces 

 glossy, naked ; fertile segm. distant, \ in. 1., ^ in. br., the edge undulated ; sori 

 in two rows, which are close to the midrib and fill up the lobes. — Hk. Sp. 4. 

 p. 32. t. 224. Dicksonia apiifolia, Sw. teste Kuhn, 



"Hab. Jamaica. — In habit this differs entirely from the other species, and coincides with 

 Dicksonia coniifolia, of which Dr. Grisebach supposes it to be a dimoiphic form. 



3G. A. (Polyst.) frondosum, Lowe; st. scattered, 1-2 ft. 1., strong, straw- 

 coloured or pale-ln-own, polished, densely scaly below ; fr. 18-24 in. 1., 1 ft. or 

 more br., subdeltoid, the lower pinnce much the largest, 6-12 in. 1., 3-4 in. br., 

 long-stalked ; pinnl. lanceolate, erecto-patent ; segm. very unequal-sided, pin- 

 natifid, with rounded mucronate lobes, obliquely truncate at the base below ; 

 texture subcoriaceous ; rachis glossy, stramineous ; both surfaces naked ; lateral 

 veins of lobes often forked ; sori large, copious, principally in two rows near the 

 midrib. — Hk. Sp. i. p. 31. 



Hab. Madeira. 



.J--X 111. HI,, ouiiucimiii , luvvcoi yunni,. imiuu Liie jargesi, lauceoiaie-ut^iiuiu, 

 2-4 in. 1., with subdeltoid lower segm. ; teeth copious, aristate ; texture sub- 

 coriaceous, glossy ; both surfaces naked, rachis nearly so ; sori small, prin- 

 cipally in two rows near the midrib ; invol. sometimes reniform. — /3, A. conii- 



