ICONES FILICUM SINICARUM 



*7 



PLATE 43 





POLYPODIUM OBLONGISORUM C Christensen 





POLYPODIACEAE 



POLYPODIUM OBLONGISORUM C. Chr. Ind. 549 (1906); Matthew in Journ. Linn. Soc. 



39:381 (1911). 



Poly podium subintegrum Baker in Kew Bull. (1898) 231 (non 1877). 



Rhizome epigaeous, wide-creeping, clothed with broad lanceolate blackish 

 membranaceous clathrate dense scales; frond 1-2 cm. apart, narrowly linear, coriaceous. 

 25-40 cm. long, 3-8 mm. broad at the middle, gradually attenuate towards the base 

 into a short stipe (2-4 cm. long), apex longacuminate, green and glabrous above, the 

 under side sparsely covered with minute peltate brown deciduous scales, margin 

 obscurely repandulous, narrowly revolute; veins obscurely immersed except costa, 

 which is prominent, particularly underneath; sori large, marginal, 

 subopposite or alternate, oblong, superficial, bullate, short oblong, 4 mm. long, pro- 

 minently projecting beyond the margin of the frond when mature, in consequence of 

 the free parts of the margin becoming revolute. 



- 



Distribution: Yunnan. 



1-2 cm. apart, 



A very remarkable plant, first discovered by A. Henry in Man-mei, Yunnan, 

 epiphytic on the trunk of forest trees, and easily distinguished by its relatively 

 large bead-like sori projecting well beyond the margin of long linear frond. From 

 P. eilophyllum Diels to which the present species is closely allied, it differs in narrower, 

 less revolute frond and the projecting marginal sori. 



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Plate 43. Fig. i. Habit sketch (natural size.) 2. Scales from rhizome (x 30). 3. A portion of 

 frond, showing venation (x 30). 





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