FEB. 1903. 



PLANTVE YUCATAN^ MILLSPAUGH. 



Hab. Damp places, in rich mold: Woodlands near Merida, 

 Valdez ig; Chichankanab, Gaumer 1341 ', 2310; and near the center of 

 Cozumel, Millspaugh PL U tow ana 1561. In fruit at all seasons. Our 

 specimens are not nearly so large nor full fruited as those of Jamaica, 

 but greatly resemble in form those met with at St. Thomas, their 

 growth being about 25-35 cm - 



Tectaria trifoliata (L.) Cav. An. Hist. Nat. 1:115. 



Poly podium trifoliatum Linn., Aspidium trifoliatum Sw. 



Fronds usually pinnatisect; segments i 2-jugal, the terminal more 

 or less tripartite, the lateral 2 3-partite, one or more of the lower 

 divisions abortive and the other 

 abnormally extended, all more 

 or less wavy-margined; main 

 veins evenly pinnate, veinlets 

 in a loose network with free 

 appendages. Sori serial along 

 the veins or scattered in the 

 junction of two veinlets ; indu- 

 sium superior, circular, peltate, 

 the margin wavy and finally roll- 

 ing inward to form a square; 

 sporangium finely anastomose- 

 veined; spores phaseoloid, with 

 four transparent, erose margined 

 wings. 



In our specimens the fronds 

 are very variable, passing from 

 hastate-entire, through sinuate- 

 cleft and trilobate forms, to a large pinnately 5-sect form with all the 

 segments 3-sect. 



Hab. Rocky walls of cenote's, in shady, damp, cool situations: 

 Cenotd of Santa Ana, Valladolid, Schott 732, 780, 782; Cenote" de 

 Cafetal, Chichen Itza, Jan. 18, 1895, Millspaugh Armour Exped., 132, 

 133; in a large cave at Buena Vista Xbac, Gaumer 994; and in a cave 

 near Calcehtoh, Stone 261, In fruit from November to March. 



ASPLENIUM. 



Sori oblong and lengthwise of the oblique veins above their base 

 and below their summit; indusium lateral, inserted along the inner 

 side of the fertile vein, and decurrent along it. Veins free. 



Asplenium pumilum Sw. Fl. Ind. Occ. 1610. 



A. heteropliyllum Presl. 



Frond pinnately 3-many partite, deltoid in general outline, the 

 lower segments petiolate, more or less 3-lobed, the others sessile and 

 decurrent, all irregularly crenate-dentate and slightly ciliate beneath 

 with sagittate hairs. Sori on the secondary veins oblique to the mid- 

 ribs of the segments; indusium scaphoid, the free margin erose and 



