MAXON STUDIES OF TROPICAL AMERICAN FERNS. 7 



The type is from Colombia, but Mexican specimens from Mirador and Orizaba are 

 also mentioned in the original diagnosis. A specimen collected recently on the island 

 of Margarita, off Venezuela, Johnston 146, is the same. 



The name has definite standing only from 1869, when the first description was 

 published. 



Rhipidopteris peltata (Sw.) Schott. 



II. 1022. Coban, altitude 1,350 meters, October, 1907. On tree trunks in forest. 



Tribe VITTARIEAE. 



Scoliosorus ensiformis (Hook.) Moore. 



II. 1694. Panzal, Baja Verapaz, altitude 1,000 meters. Epiphytic in forest. 



Regarded by Benedict,' 1 in his recent revision of the American species of Antro- 

 phyum, as constituting only a well-marked subgenus of Antrophyum; yet of very 

 different appearance, and upon the several microscopic characters brought out (i.e., 

 spores diplanate, paraphyses present) differing from all the American species of 

 Antrophyum. 



Described originally from Mount Totontepeque, Mexico, and ranging from Mexico 

 to Costa Rica. The synonymy is indicated by Benedict. 



Vittaria filifolia Fee. 



II. 1382. Cohan, altitude 1,350 meters, November, 1907. Epiphytir, in forest. 

 II. 1689. Forests above Panzal, Baja Verapaz, altitude 1,500 meters, April, 1907. 

 Both numbers have been determined by Mr. R. C. Benedict. 



Tribe POLYPODIEAE. 



Campyloneurum angustifolium (Sw.) Fee. 



II. 2349. Coban, altitude 1,350 meters, May, 1908. 



Campyloneurum tenuipes Maxon, sp. nov. 



Fronds 4 or 5, erect, loosely clustered near the apex of the prostrate rhizome, very 

 long-stipitate, 40 to 60 cm. long; rhizome woody, creeping, 10 to 20 cm. long, 8 to 10 

 mm. in diameter, copiously rooting below, above densely tuberculate, toward the apex 

 thickly covered with spreading deltoid-lanceolate attenuate dark brown scales 5 to 7 

 mm. long; stipe relatively slender, 2 to 3 mm. in diameter, light brownish, glabrous, 

 deeply sulcate along the ventral face, angled in drying, 18 to 25 cm. long; lamina 

 firmly chartaceous, 25 to 40 cm. long, 5 to 7 cm. broad, linear-lanceolate, gradually 

 narrowed to an acute or acuminate base, the apex very abruptly long-acuminate, the 

 midvein slender, yellowish brown below and a little elevated, the margins repand- 

 undulate, cartilaginous, minutely revolute; main veins 45 to 55 pairs, diverging at an 

 angle of about 75 degrees, the middle ones 5 to 8 mm. apart, stramineous, subequally 

 elevated upon both surfaces, slightly fiexuous, extending almost to the margin; areoles 

 7 or 8, excepting the basal ones commonly divided by a median excurrent veirdet, 

 this discontinuous or continuous with that of the next areole, 2 rows of minor areoles 

 thus formed, each of them with a single small sorus dorsal upon the short included 

 veinlet, the sori thus irregularly biserial between the main veins. 



Type in the U S. National Herbarium, no. 826269, collected from rocks in the 

 forest near Coban, Alta Verapaz, Guatemala, altitude 1,350 meters, by Baron H. von 

 Turckheim, no. II. 1952, September, 1907. 



A remarkable species, combining to a considerable degree the characters of two 

 very different groups. In venation it resembles C. xalapense of the same region rather 

 closely, but differs widely in leaf form and especially in its long slender Btipes, C. 

 xalapense having short stipes and the lamina longer and narrower, gradually narrowed 



a Bull. Torr. Club 34: 445-458. 1907, 



