30 | FILICES. [Polystichum. 
Indusium orbicular, flat, with a rather large dark disc and pale margin.— 
P. aristatum Hook. f. Fl. Nov. Zel. i (1855) 37, t. 78 (not of Presl). 
Aspidium Richardi Hook. Sp, Fil. iv (1862) 23, t. 222; Hook. f. Handb. 
N.Z. Fl. (1864) 375; Hook. and Bak. Syn. Fal. (1873) 253; Thoms. N.Z. 
Ferns (1882) 79; Field N.Z. Ferns (1890) 128, t. 13, f. 4; Cheesem. Man. 
N.Z. Fl. (1906) 999. Aspidium acutidentatum A. Rich. Fl. Nouv. Zell. 
(1832) 71. 
NortH anp Soutu Istanps: From the North Cape to the south of Otago, not 
uncommon in lowland districts, especially near the sea. 
Also in Fiji. A variable plant, especially in the extent to which the pinnae are 
divided, and in the shape and toothing of the pinnules. 
4. P. oculatum J. 8B. Armstr. in Trans. N.Z. Inst. xii (1881) 364.— 
“Rhizome absent. Fronds 10-20in. long, coriaceous, ovate - oblong, 
acuminate, 3-pinnate, pale and clothed with woolly hairs below; stipes 
stout, straw-coloured, covered with rigid, large, subulate, brown scales 
margined with white; rhachis with fewer softer scales and lax woolly 
hairs; primary divisions of the frond 2-4 in. long, narrow ovate-lanceolate, 
acuminate, stalked, not close together; secondary also Lae 2] in. long, 
sessile or stalked : pinnules alternate, sessile, decurrent, 4 in. long, obtuse 
or mucronate, obtusely toothed or subpinnatifid. Sori abundant over 
the whole under-surface, 2-4 on each segment ; involucre orbicular, shortly 
stalked, with a large black disc and narrow reddish margin.’”—Aspidium 
oculatum Hook. Sp. Fil. iv (1862) 24, t. 228; Hook. f. Handb. N.Z. FI. 
(1864) 376; Hook. and Bak. Syn. Fil. (1873) 253; Thoms. N.Z. Ferns 
(1882) 79; Field N.Z. Ferns (1890) 129; Cheesem. Man. N.Z. Fl. (1906) 
999; 
Norta anp SoutH Istanps: ‘“‘ Wairarapa Valley, Colenso; Akaroa, Raoul” 
(Handbook). 
I have not identified this with certainty, and have consequently reproduced the 
description given in the Handbook. It is probably nothing more that a trivial variety 
of P. Richard: with a rather laxer frond than usual, and smaller and shorter pinnules 
with more obtuse teeth. Mr. Baker keeps it as a distinct species in the “‘ Synopsis 
Filicum,” but in the ‘“‘ Annals of Botany ” (v, 314) he remarks that it is evidently a 
mere variety of P. Richardie 
5. P. eystostegia 7. B. Armstr. on Trans. N.Z. Inst. xin (1881) 364.— 
Rhizome short, stout, densely scaly, sometimes branched above. Stipes 
2-61n. high, pale-brown, clothed with copious large pale-brown shining 
membranous lanceolate scales. Fronds very numerous, tufted at the top 
of the rhizome, 4-10 in. long without the stipes, 14-2in. broad, oblong- 
lanceolate, acute, pale-green, soft, membranous aud almost flaccid, both 
surfaces clothed with linear scales when young, 2-pinnate; rhachis stout, 
densely scaly. Pinnae spreading, closely placed above the middle, remote 
below, 141 in, long, ovate-deltoid, pinnate; rhachises often winged. 
Pinnules 4-4 in. long, ovate-lanceolate, deeply lobed or pinnatifid ; 
segments obtuse or acute. Sori numerous, large, 2-4 to a pinnule. 
Indusium orbicular, very convex, almost hemispherical, thin and 
membranous, pale-coloured. — Aspidium cystostegia Hook. Sp. Fil. iv 
(1862) 26, t. 227 ; Beh f. Handb. N.Z. Fl. (1864) 376 ; Hook. and Bak. 
Syn. Fil. (1873) 253; Thoms. N.Z. Ferns (1882) 79; Field N.Z. Ferns 
(1890) 128, t. &, f. 5. Cheesem. Man. N.Z. Fl. (1906) 1000; Til. N.Z. Fl. 
ii (1914) t. 244. 
