43. ASPIDIUM, § POLYSTICHUM. 253 



mncronate ; texture subcoriaceous ; surfaces naked ; raohis densely fibrillose 

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



Hab. Luzon, Cumimg, 234, iio65.— Probably should be joined to acvileatum. 



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

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

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

 lower cut down nearly or quite to the racliis ; 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. 565. 



Hab. California, Hillelyra/ad. — I think a mere form of aevXeatum. 



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

 throughout ; jr. 9-18 in. I., 6-9 in. br., ovate-deltoid, with numerous close- 

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

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

 slightly scaly ; both surfctces 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 aculeatwm 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 ; jr. 1 ft. or more 1., 4-6 in. br., 

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

 deltoid, a-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. 

 —m. Sp. 4. p. 24. *. 228. 



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

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



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

 with large lanceolate pale-brown scales ; fr. 6-9 in. 1., l|-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 ; eolov/r 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.) Prescottianum, Hk. ; st. tufted, 1-4 in. 1., clothed with large 

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

 lanceolate, with numerous spreading pinnce, 1-1 J 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, 



