ICONES FILICUM SINICARUM 
PLATE 123 
HYPODEMATIUM CYSTOPTEROIDES Ching 
‘POLYPODIACEA 
HYPODEMATIUM CYSTOPTEROIDES Ching, sp. nov. 
Aspidium crenatum Christ, Nuov. Giorn. Bot. Soc. Ital. n.s. (1897) 94; Bull. Bot. Soc. ltal. 
(1901) 297. - 
Status et configuratione cum H. Fordii (Baker) e China australis valde con- 
gruens, differt; indusiis tenuisissimis non rotundo-reniformibus sed valde varian- 
tibus, aut lanceolato-triangularibus, aut ovatis, aut evato-triangularibus, basi vix 
cordatis, pinnulis anguste lanceolatis vel oblongo-lanceolatis, elongatis, sese multo 
separatis, longe acuminatis, basi magis cuneatis. : 
Rhizome slender, wide-creeping, densely scaly; scales rufo-brown, to°7 mm 
long, ovate-lanceolate, acuminate, entire, densely clothing the swollen: base of 
Stipe; frond approximate, long-stipitate, stipe 10-22 cm long, gracil, flexuose, pale- 
colored, naked throught, lamina ovate-deltoid, 7-11 cm long and as broad, long- 
acuminate, tripinnate; lateral pinne about 8-jugate under the pinnatifid acuminate 
apex, the basal ones much the largest, deltoid, opposite, to 10 em long, 6 cm broad, 
basicopically produced, long-petiolate, the upper pinnae gradually abbreviated, ob- 
long-lanceolate or lanceolate, all shortly petiolate with equal, subcuneate base, 
rather wide apart from each other, the second pair of pinne from the base to 6 cm 
long, 2 cm broad near the base, pinnate; pinnules 7-jugate, rather far apart, oblong- 
lanceolate, to 1.2 cm long with subequal, cuneate, decurrent base and bluntly 
dentate apex, pinnatifid to the costule into 6-7 pairs of oblong or sparcely dentate 
segments; veins forked, ending in blunt teeth; both sides sparcely glandular hairy; 
texture thin herbaceous, color green; sort 5-7 pairs to each segment, medium-sized, 
rounded, indusium whitish, membranaceous, cystopteroid, triangular-lanceolate or 
ovate-deltoid with broad and hardly cordate base, cucullately attached to the re- 
ceptacle. 
Shantung: Tsinan, A. P. Jacob 21; ibid. Chien Fo Shan, specimens ex herb. 
Dept. Biol. Cheeloo Univ. (without collector’s name); Tai-shan, A. P. Jacod 1; 
Chefoo, E. Faber 1054 (herb. Kew, sub Dryopteris crenata). Shensi: Mt. Uan-san- 
pin prope ‘‘Pagoda’’, Giraldi, July 16, 1894; See-kin-tzuen, Giraldi, Dec. 28, 1895; 
The-pe-shan, Giraldi, August, 1896. 
Our fern is more closely related to H. Fordii (Baker) than to H. crenata 
(Forsk.) in gracil habit and type of hairs, but differs in its long-acuminate apices of 
frond and of lateral pinne, which are elongate oblong-lanceolate with cuneate base 
in the middle pinne, and in its cystopteroid indusium, a character which alone 
markes this species very unique in the genus. 
Plate 123. Fig. 1. Habit sketch (natural size). 2. Ultimate pinnule, showing venation and sori 
(x 14). 3. Scale from the swollen base of stipe (x Io). 4. Indusium (x 20). 5. Spores (enlarged). 
