FEB. 1903. 



PLANIVE YUCATAN^E MILLSPAUGH. 



Ornithopteris adiantifolia (L.) Bernh. 



Osmunda adiantifolia Linn., Anemia adiantifolia Sw. 

 Sterile leaf glabrous, usually longer than the fertile, 2-3-pinnat- 

 ifid, the ultimate segments cuneate-elliptical, denticulate above, 



striate with many flabellate 

 veins. Fertile leaf-segments 

 minute, crenately 4-6-cleft. 

 Sporangia obpyriform, the sur- 

 face densely reticulate-veined; 

 apical ring 8-i2-rayed. Spores 

 ovoid, the surface marked by 

 several prominent ridges con- 

 vergent at the base and apex. 

 Plants 12-40 cm. high, 

 the sterile leaf 15-24 cm., in- 

 ferior segments 1-1.5 cm - I n 

 fruit at all seasons. 



Hab. On limestone rocks 

 in shady places. Ruins of 

 Uxmal and Mayapan, Schott 

 651 ; the Great Mound at Izamal, Jan. 13, 1895, Millspaugh, Armour 

 Exped. 58 ; and Gaumer 372; woodlands near Chichankanab, Gaumer 

 1408, 1458, 1716, Pocoboch, 2382; deep woods, center of the Island of 

 Cozumel, Millspaugh, PL Utowance, 1563. 



Ornithopteris cicutaria (Ktze.) Underw. Mem. Torr. Club 12:15. 



Anemia bipmnata Moore. 



Sterile leaf once to twice shorter than the fertile, 2-3-pinnatifid, 

 the ultimate segments cuneate, 

 irregularly incised and wavy- 

 margined, with a few scattered 

 lax, aciculate hairs upon the 

 under surface. Fertile leaf- 

 segments minute, about 4-cre- 

 nate, the edges involute; spo- 

 rangia obpyriform, the surface 

 closely and prominently reticu- 

 late ridged, apical ring about 

 8-rayed, spores cordate-triangu- 

 lar, the surface finely papil- 

 late. 



Plants 6-12 cm. high, the 

 sterile frond 2.54 cm> Inferior 

 segments 5-8 mm. In fruit at 

 all seasons. 



Hab. On rocks, near aguadas and cenote's. Cenote" of Uayma, 

 and Ya Uoil, Schott 677. 



