FEB. 1903. 



PLANTVE YUCATAN^E MILLSPAUGH. 



outline, tripinnatisect, the segments small, blunt, and deeply crenate- 

 lobed, all recurrent on the hairy rachides, and hairy especially beneath. 



Sori more or less distinct; indu- 

 sia interrupted, membranaceous, 

 formed of the recurved crena- 

 tions of the ultimate segments; 

 sporangia more or less circular, 

 finely and closely anastomose- 

 veined; -spores globular, com- 

 pletely invested with a network 

 of irregularly anastomosing 

 prominent ridges. 



Stipes 6-1 2 cm. long; 

 fronds 8x8 cm. 



Hab. Rich cool woods. 

 So far this species is only 

 known in our range through a 

 specimen collected by Dr. 

 in 1885. 



Gaumer on the island of Cozumel 



ADIANTUM. 



Stipes black and polished. Sori marginal, short, borne on the 

 under side of a transversely oblong, semilunar, or roundish, more or 

 less altered margin or summit of a segment lobe, which is reflexed to 

 form an indusium. Main rib of the segment none, or obscure at the 

 lower margin. 



Adiantum tricholepis Fe, Gen. Fil. 107. 



Rootstock short, stout and scaly. Stipes black, polished. 

 Fronds 3-4-pinnate, ovate in general outline; segments small, numer- 

 ous, roundish-rhombic, the ulti- 

 mate mostly 3-crenate; all hairy 

 on both sides but especially on 

 the strongly marked veins 

 beneath. Marginal i n d u s i a 

 usually 3 on each segment, 

 hairy; sporangia coarsely anas- 

 tomose-ridged; spores triangu- 

 lar, the sides concave, each with 

 a central hyaline globule and a 

 transparent three-forked line 

 connecting the angles. 



The apex of the frond shown 

 in the cut is natural size. Stipes 

 7-18 cm. long; fronds 20-30 x 

 16-28 cm. The Yucatec name 

 for the Adiantums, CULAN- 

 TRILLO, answers to the English 

 " Maiden-hair." Both species are used indiscriminately by the people 



