FEB. 1903. 



PLANTVE YUCATAN/E MILLSPAUGH. 



ii 



Phegopteris rudis Fe"e. 



Polypodium rude Kunze., Alsopliila pilosa Mart. & Gal. 

 Fronds pinnatisect; pinnules sharply lanceolate, the lower pinnat- 

 ifid for at least one-half their length, hairy beneath, especially on the 



midrib and veins; segments 

 ligulate-falcate, acute or acutish, 

 entire; veinlets free, the lowest 

 pair not meeting at the sinus. 

 Rachis terete. Sori contiguous 

 at the ends of the veinlets where 

 the margins of the segments are 

 half revolute but in no sense 

 indusiate; sporangia pyriform, 

 finely anastomose-veined, not 

 aciculate haired; spores phaseo- 

 loid, slightly interrupted-winged, 

 and broadly few-anastomosed 

 by the hyaline placentoid mem- 

 brane. 



Hab. Shady, cool places 

 on rocks. This species, while 

 belonging naturally to this region, must be quite infrequent, as the 

 only specimen so far collected is an immature frond gathered by 

 Dr. Schott, at the Cenote" of Sacalun. (Herb. Field Col. Mus. No. 

 59161.) 



Campyloneuron Phyllitidis (L.) Presl. 



Polypodium Phyllitidis Linn. 



Frond rigid, chartaceous, glabrous, oblong-lanceolate or oblong- 

 linear, irregularly slight-repand, long-tapering into the stipitate or 

 nearly sessile base; veins straight, 

 costate; veinlets arched - trans- 

 verse, 3-appendaged, the third 

 appendage prolonged from the 

 anastomosis of the veinlets par- 

 allel to the costae. Sori circular 

 in outline, arranged in regular 

 series parallel to the costae, and 

 borne on the back of the lateral 

 appendages to the veinlets; 

 sporangia nearly circular, finely 

 and regularly anastomose- 

 veined; spores opaque, phaseo- 

 loid, the convexity filled with a 

 hyaline membrane. 



Fronds 30-70x5-8 cm. 

 Rootstock nearly globular. 



Hab. On decaying trees 



and stumps. Cenot of Maxcabicu, Schott 781; Laguna Colombia, 

 south end of Cozumel, Jan. 5, 1895, Millspaugh, Armour Exped. 38. 



