ICONES FILICUM SINICARUM , 7* 



PLATE 35 . 



PTERIS ACTINIOPTEROIDES Christ 



POLYPODIACEAE 



PTERIS ACTINIOPTEROIDES Christ in Bull. Boiss. 7:6(1899); Diels in Nat. Pfl. Fam. 



1. 4. 292 ; C. Chr. Ind. 591 (1906) ; Matther in Journ. Linna. Soc. 39:388 (1911) ; 



C. Chr. in Medd. Goteb. Bot. Tradg. I. 96 (1924). 



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Rhizome short ; stipes in dense tuft, upright or spreading, slender, angular, 3-6 



r 



cm. long, reddish-straminous or light ebeneous, polished ; frond dimorhpous, the 

 sterile one much shorter than the fertile, quiquefoliate, the 7-15 cm. long, broadly 

 deltoid, bipinnate, pinnae 2-3 on each side under the tri-foliolulate terminal one, the 

 basal ones shortly petiolate, usually 2-3-forked, the middle ones forked or simple, the 



% 



uppermost ones always simple, segments equal, linear, 4-6 cm. long, 1-2 mm. broad, 

 margin entire except the apex, which is usually sharply serrate, texture chartaceous, 

 glossy, entirely glabrous, rachis reddish ; inducium rather broad (| mm. broad), whitish, 

 continuous with entire margin, not extending to the serrated apex of the segment. 



Distribution : Yunnan, Szechwan, Hupeh. 



A very interesting little fern, which is, in habit, somewhat intermediate between 

 P. multifida Poir. and P. dactylina Hk , from both of which differs, by smaller size, very 



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narrow fertile segments and castaneous stipes and rachis. In was first collected in 

 Mengtze, Yunnan, by A. Henry and reported ever since from Szechwan and Hupeh. 

 According to Christensen the plant from W. szechwan grows to 40 cm. tall including 

 the stipe, with 6-7 pairs of lateral pinnae under a fan-shaped apex consisting 7 segments; 

 but all the specimens, No. 2965, collected by Prof. K. K. f soong (1921) on Tai Hwa 

 Shan, Yunnan, perfectly agree with Christ's type in dimension, and it is evidently a com- 

 mon fern, growing in the crevices of exposed rocky cliff as his notes indicate. — R. C. C. 



Plate 35. Fig. 1. Habit sketch (natural size). 2. An ultimate segment, showing venation and 

 and inducia, (x 3). 3. A cross section of fertile segment, showing inducia and sori (x 5). 



