43. ASPIDIUM, § POLYSTICUUM. 253 



mucronate ; texture subcoriaceous ; surfaces naked ; rachis densely fibrillose 

 sort ill two rows midway between edge and midrib. — lU: iSp. 4. p. 24. t. 221. 



Hiib. Luzon, Cuming, 234, io66. — Probably should be joined to aculealum. 



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

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

 the largest 2 in. 1., ^ in. br., the upper i)art with a broad, entire centre, the 

 lower cut down nearly or quite to the rachis ; pivnl. 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 phinoe. — Proc. Am. Ac. vol. 6. 

 p. 555. 



Hab. California, Hilleh-and. — I think a mere form of acukatum. 



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

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

 placed lanceolate pinnce 3-6 in. I., 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. — Hk. 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-1^ in. br., with lanceolate jozww/. 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. 

 —m-. 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.) cj/stostegia, 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- 

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

 reduced; lower jo/?;?;^. 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. — Hk. Sp. 4. p. 26. t. 227. 



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

 in texture. 



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

 lanceolate pale-brown scales ; //'. 12-18 in. 1., 2-3 in. br., narrowly ovate- 

 lanceolate, with numerous spreading pifina;, 1-1| in. 1., ^-§ in. br., cut down to 

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

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

 immersed ; so?-i filling up nearly the whole breadth between edge and midrib. — 

 Ilk. 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.) nnomalum, Hk. & Arn. ; st. tufted, 1-2 ft. 1., stout, erect, 



