FEB. 1903. 



PLANTVE YUCATAN^: MILLSPAUGH. 



HEMIONITIS. 



Fronds cordate, entire, or palmately cleft or parted. Sori naked, 

 eticulated, continuous upon the whole loose network of veins. 



Hemionitis palmata Linn. Sp. PI. 1535. 

 Gymnogramme palmata Lk. 



Fronds more or less palmately cleft into three lobes, the upper- 

 most lanceolate, entire, the lateral lanceolate and auriculate at the 



base, causing the frond to 

 appear 5-lobed; rusty-pilose, 

 especially along the margins 

 beneath and on the upper 

 third of the long stipe. Seg- 

 ments irregularly large crenate- 

 dentate. Sori naked, lineal- 

 continuous, covering the en- 

 tire venous system of the 

 frond; sporangia nearly sessile, 

 reticulately broad-veined; 

 spores globular or nearly so, 

 transparent, densely papillate. 

 Stipes 10 1 8 cm., fertile 

 fronds 4-7 cm. In full fruit 

 from November to March. 



Hab. In dense forests. 

 So far only found at one sta- 

 tion: the dense forests of Buena Vista Xbac, where it is reported as 

 being common, Gaumer 1072. 



PELL^A. 



Sori in elongated clusters at the upper ends of the free veins, usu- 

 ally so confluent as to appear continuous, and commonly covered by a 

 broad, membranaceous, continu- 

 ous or interrupted general in- 

 dusium consisting of the altered 

 and reflexed margins of the fer- 

 tile segments. 



Pellaea aspera (Hook.) Baker, 

 Syn. Fil. 148. 



Cheilanthes aspera Hooker. 



Stipes shining-purple, 

 woolly-hairy above. Fronds 

 elongated, slender, pinnately 

 divided, the pinnules alternate ; 

 segments oblong-deltoid, blunt, 

 the larger irregularly bilobate at 

 the base and crenate above, the 

 smaller and terminal crenate, all strigose-hairy above and beneath. 



