



•ICONES FILICUM SINICARUM 



2.5 



PLATE 13. 



POLYSTICHUM CHUNK Chin 



S 



POLYPODIACEAE 



POLYSTICHUM CHUNII Ching in Sinesia 1:2 (1929). 



Rhizome thick strong, woody, rather short, oblique-ascending; scales large, dense 

 imbricate, membranaceous, ferruginous, broad ovate, long acuminate, 6-10 mm long 

 3-5 mm. broad; stipes fasciculate, 5-10-clustered, 8-12 cm. long, 2 mm. thick, rufo- 

 stramineous, densely clad in dimorphic scales, 'the one similar to the rhizomatic ones, the 

 other smaller, fibrillose-subulate or linear-subulate, extending throughout the rachis; 

 fronds linear-lanceolate, 35-42 cm. long (including stipes 9-11 cm. long) 4.2-5 cm.' 

 broad, bipinnate, abbreviate towards base, long attenuate towards apex, gemmiferous 

 and radicant at tip or a considerable distance backward; gemmae globular, densely 

 clad with imbricate scales similar to the rhizomatic ones; pinnae subsessile, alternate or 

 sub-opposite, rather conferted, horizontally patent, with the lower ones deflexed, 

 numerous, 30-35 on each side of the rachis, glabrous above, fibrillose beneath, clad at 

 the point of insertion beneath with a few ovate, acuminate, ciliate scales, Z-2.5 cm. 

 long, 1 cm. broad at base, oblong-lanceolate, pinnate (except the terminal ones which 

 are only aristate-crenate, or -serrate) below the middle, pinnatifid towards apex, strongly 

 auricled on the anterior side; i.e., the basal pinnule on the upper side of the costa 

 much the largest with its inner side cut parallel to the rachis with aristato-acute apex; 

 pinnules 5-7, conferted, basal ones free, sessile, upper ones adnate, rhomboidal-ovate, 

 entire or crenate, rounded and aristate at apex; texture thick coriaceous, shining green 

 above, pale below; veins inconspicous, lateral veinlets in the pinnules 3-5-jugate, free, 

 mostly once-forked; sori small, uniseriate, 2-3 on each side of the costule, medial, dorsal 

 on the veinlets, indusium small, coriaceous, persistent. 



Distribution: Kwangsi. 



Plate 13. Fig. I. Habit sketch, natural size. 2. A pinna (x 2). 3. A pinnule from the 



base of pinna, showing venation and sori (x 12). 4. Scales from stipe (x 24). 5. Scale from rachis 

 (X24). 



