



ICONES FILICUM SINICARUM 



27 



PLATE 



T 4- 



CYRTOMIUM HEMIONITIS Christ 



CRYOTMIUM HEMIONITIS Christ in Bull. Geogr. Bot. Mans. (1900) 138; Chr. Ind. Suppl. 



101 (1906-13). 



* 



■ 



Rhizome oblique or erect, thick as man's finger, black,* covered with the vestiges 

 of persistent stipes; leaves fasciculate (3-6 together); stipes slender, but rigid, 

 stramineous, blackish at the base, i\ mm. thick, 10-15-18 cm. long, clothed near the 

 base with ovate-lanceolate dark brown entire subulate scales 2/3 cm. long, the parts near 

 the base of frond clothed with black setae, the matured plant almost glabrous; frond 

 simple, hastato-triangular, base deeply cordate with narrow or close sinus, broadly 

 auriculate, on each side, shortly acuminate or acute at the apex, 8 cm. long and broad, 

 margin perfectly entire; texture rigid, coriaceous, color light green above, paler and 

 opaque below; veins conspicuous, close, flabellato-pinnate, very oblique, anastomosing 

 into elongate large areolae with 1-2 excurrent included soriferous veinlets; sori numer- . 

 ous, brown, sparsely and irregularly disposed all over the under surface, ij mm. broad, 

 subrounded, inducium peltate, laiger than sorus, turgid, gray, with denticulate margin 

 and raised black centre, persistent or falling off at last. 



Distribution: Kweichow. 



This interesting fern differs from all known species in the genus by its simple 

 entire, broadly hastato-cordate leaves, resembling our Phyllitis cardiophylla (Hance) 

 Ching in outline. It was first discovered in Pin-fa, Kweichow, by Pere J. Cavalerie in 

 1908 and later in 191 1 by Pere J. Esquirol in the same locality. The addition of this 

 species to the genus Cyrtomium has practically completed the uninterrupted line of de- 

 velopment of all the types represented in the genus from the very simple form to pinnate 

 and more ample bipinnate forms. 



Plate 14 Fig. 1. Habit sketch, natural size. 2. A portion of the frond, showing venation 

 and sori, natural size. 3. The same (x 3). 4- Inducium (x . 104). 5. Two sporangia (x 160). 6. 

 Scales from rhizome and base of stipe (x 5). 





