I 



ICONES FILICUM SINICARUM 



4* 



PLATE 21. 



ATHYRIUM ANISOPTERUM Christ 



POLYPODIACEAE 



ATHYRIUM ANISOPTERUM Christ in Bull. Boiss. 6:962 (1898), Bull. Geogr. Bot. Mans (1907) 



133; C. Chr. Ind. 139 (1906); Matthew in Jour. Linn. Soc. 39: 348 (1911). 



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Athyrium fauriei Mak. var. elatius Christ in Bull. Boiss 6:193 (1898). 



* 



Rhizome thick, short, oblique; stipes slender, fasciculate, but few (3-4) together, 

 base incrassate, dark brown or blackish, clothed with moderately dense brown scales, 

 stramineous upward, 25 cm. long, glabrous in other parts; Jrond to 28 cm. long, to 

 8 cm. broad, somewhat broader towards the base, gradually attenuate towards the 

 apex, oblong-lanceolate, bipinnatifid or sparsely bipinnate near the base; pinnae about 

 17 on each side, alternate, petiolate, the lower ones horizontally patent, remote, the 

 lowest much the largest, oblong-deltoid, strongly unequal, truncate or cuneate on the 

 under side at the base, auricled on the upper side, apex rather acute or shortly 

 acuminate, the largest to 5 cm. long, 2.5 cm. broad, pinnate near the base, deeply 

 pinnatifid above; pinnules or lobes oblique, oblong-ovate, obtuse, about 7 on each 

 side, the basal pair in the lower pinnae usually free, the superior one much the largest, 

 thus making the pinnae appearing auricled, contiguous to or somewhat imbricate on 

 the rachis, inciso-crenate or deeply pinnatifid, the other lobes adnate to the broad 

 winged costa and only deeply incised towards the apex, the upper pinnae deeply inciso- 

 lobed, lobes obtuse, obscurely crenate; sori numerous, large, 8, 7, 5 or 3 to each lobe, 

 1.5-2 mm. long, usually hippocrepiform or ovate, inducium persistent, gray, reniform; 

 texture thin herbaceous, color obscurely green on both sides. 



* 



Distribution: Yunnan, Hupeh, and also Luzon of the Philippine Islands. 



A medium-sized fern of an elegant habit, easily recognized by its rather unequal 

 pinnae, which are prominently auricled above and truncate or cuneate below and by 

 large gray horseshoe-shaped sori with persistent indusia. It was first collected by A. 

 Henry in Man-mei, Yunnan, and later by Pere Ducloux in the same province; and also 

 recorded in Luzon, the Philippine Islands, by Tonglon and Copeland. 



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Plate 21. Fig. 1. Habit sketch (natural size). 2. A pinna from the basal part of frond (x 2). 

 A pinnule, showing venation and sori (x 5). 4. Scales from rhizome (x 30). 



