1913] CHRISTENSEN—FILICES PURDOMIANAE 335 
oblongis, sessilibus, obtusis vel acutis. Pinnulis 4~-5-jugis, ovatis 
vel oblongis, obtusis, inferioribus late adnatis 1 cm. longis, 5—7 mm. 
latis, superioribus decurrentibus, versus apicem pinnarum con- 
fluentibus, profunde lobatis. Lobis ovatis, obtusis, maximis 
crenatis. Indusiis subcontinuis, leviter fimbriatis vel potius 
erosis, pallide-luteis. 
Shensi: Tai-pei-shan, Purpom nos. 24 and 25. A most distinct species 
of § ALEURITOPTERIS, characterized by the lanceolate shape of the lamina, 
which is entirely destitute of hairs and scales. In general habit it resembles 
not a little the Mexican C. aurantiaca (Cav.) Moore, although the pinnae are 
somewhat more divided. The stipe and rachis are very fragile 
CYSTOPTERIS MOUPINENSIS Franch.—Tai-pei-shan, nos. 14 and 
63. 
No doubt specifically different from C. sudetica A. Br.; the indusia are 
eglandulose. 
DRYOPTERIS LACERA (Thunb.) O. Ktze.—No. 68. 
Very typical. A. filix-mas var. Giraldii Christ, Nuov. Giorn. Bot. Ital. 
N.S. 4:94. 1897 is no doubt this species. 
I 
Dryopteris Purdomii, sp. nov.—Lastrea rhizomate (?), stipi- 
tibus ad 1ocm. longis stramineis gracilibus, supra bisulcatis et 
decidue hirtis. Lamina anguste lanceolata, 30-35 cm. longa, 
medio vix 5 cm. lata, utrinque attenuata membranacea, bipinna- 
tifida. Rachi gracili straminea, pilis albis brevibus patentibus 
deciduis sparse pubescente. Pinnis inferioribus 2—3-jugis abbre- 
viatis, 1-2 cm. longis, inter se 7 cm. remotis, medialibus maximis 
3-4cm. longis, basi 1.2-1.4 cm. latis, sessilibus, 3 cm. inter se 
remotis, e basi latiore versus apicem breviter aescncouigs sensim 
attenuatis, plerumque curvatim erectis, supra pilis b ntrorsis 
praesertim ad costas costulasque setulosis, infra ad costas costu- 
lasque pilis patentibus albidis subdense hispidulis, marginibus 
ciliatis, ad alam 1mm. latam pinnatifidis. Laciniis obliquis, 
triangulari-acutis, marginibus revolutis integris, basali superiore 
parum longiore. Venis indivisis, ca. 5-jugis, obliquis, basalibus 
marginem supra sinum acutum attingentibus. Soris medialibus, 
numerosis, exindusiatis, receptaculo piloso, sporangiis setosis. 

