43. ASPIDIUM, POLYSTICHUM. 253 



mucronate ; texture subcoriaceous ; surfaces naked ; rachis densely fibrillose ; 

 sori in two rows midway between edge and midrib. Hk. Sp. 4. p. 24. t. 221. 



Hab. Luzon, Cuming, 234, Lobb. Probably should be joined to aculeatum. 



22. A. (Polyst.) californicum, Eaton ; st. 4-6 in, 1., straw-coloured, slightly 

 scaly ; fr. 12-15 in. 1., 4 in. br., with numerous close-placed lanceolate pinnae, 

 the largest 2 in. 1., \ in. br., the upper part with a broad, entire centre, the 

 lower cut down nearly or quite to the rachis ; pinnl. ovate-deltoid, unequal- 

 sided, the teeth very mucronate ; texture coriaceous ; rachis clothed throughout 

 with small pale-brown scales; under surface fibrillose, especially on the midrib ; 

 sori almost confined to the outer half of the pinnce. Proc. Am. Ac. vol. 6. 

 p. 555. 



Hab. California, Hillebmnd. Very near A. lobatum. 



23. A. (Polyst.) Richardi, Hk. ; st. tufted, 6-12 in. 1., stout, erect, scaly 

 throughout ; fr. 9-18 in. 1., 6-9 in. br., ovate-deltoid, with numerous close- 

 placed lanceolate pinnce 3-6 in. 1., 1-1^ in. br., cut down below into distinct 

 lanceolate sharply-toothed deeply-lobed pinnl. ; texture coriaceous ; rachis 

 slightly scaly ; both surfaces nearly naked ; veins immersed ; sori in two rows 

 midway between the midrib and edge. HTc. Sp. 4. p. 23. t. 222. 



Hab. New Zealand and Fiji. Differs from aculeatum by its more rigid texture, shorter 

 teeth, and lower pinnae not reduced. 



24. A. (Polyst.) oculatum, Hk.; st. tufted, 1 ft. 1., firm, straw-coloured, clothed 

 throughout with dark-brown lanceolate scales ; fr. 1 ft. or more 1., 4-6 in. br., 

 ovate-deltoid, with numerous pinnce on each side, the lower ones lanceolate- 

 deltoid, 3-4 in. 1., 1 J-l| in. br., with lanceolate pinnl. cut down nearly to the rachis 

 into oblong-rhomboidal segm. ; texture coriaceous ; rachis scaly throughout ; 

 lower surface furfuraceous ; veins immersed ; sori in two rows near the midrib. 

 Hk. Sp. 4. p. 24. t. 228. 



Hab. New Zealand. Very near the last, but the under surface downy, and segments 

 shorter and blunter. Species 19-24 are all very near to 18. 



25. A. (Polyst.) cystostegia, Hk. ; st. tufted, 2-4 in. 1., brown, shining, clothed 

 with large lanceolate pale-brown scales ; fr. 6-9 in. 1., 1^-2 in. br., oblong- 

 lanceolate ; central pinnce close, ovate-deltoid, the lower ones distant and 

 reduced ; lower pinnl. oblong-lanceolate, deeply lobed, the teeth blunt ; texture 

 subcoriaceous ; colour bright-green ; surfaces naked ; rachis densely clothed with 

 linear pale-brown scales ; sori in two rows in the lower pinnl. ; invol. large, 

 very convex. .#&. Sp. 4. p. 26. t. 227. 



Hab. Mountains of N. Zealand. A well-marked plant, scarcely more than herbaceous 

 in texture. 



26. A. (Polyst.) Prescottianum, Hk. ; st. tufted, 1-4 in. 1., clothed with large 

 lanceolate pal'e-brown scales ; fr. 12-18 in. 1., 2-3 in. br., narrowly ovate- 

 lanceolate, with numerous spreading pinnce, 1-1^ in. 1., ^-f in. br., cut down to 

 the rachis into several oblong-rhomboidal pinnl. with aristate teeth ; texture 

 subcoriaceous ; rachis weak, stramineous, densely scaly throughout ; veins 

 immersed ; sori filling up nearly the whole breadth between edge and midrib. 

 Hk. Sp. 4. p. 22. t. 223. 



Hab. N. India, ascending to 12,000 ft. Distinguishable from the other Himalayan 

 forms by its long narrow finely-cut flaccid frond. 



27. A. (Polyst.) anomalum, Hk. & Arn. ; st. tufted, 1-2 ft. 1., stout, erect, 



