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Underwood: The Genus Phaneropiilebia 211 



F 



medium-sized, in about three rows, the innermost row less than 

 2 mm. from the midrib. 



Apparently confined to central Southern Mexico. Specimens 



have been seen as follows : 



Mexico : San Nicolas, Bourgeau, 1049 (K, N, G, C, E 

 San Luis Potosi : Schaffncr (K, U). Mexico : Circa urbem Mexici, 

 Schmitz, 26 (K). Vera Critr. : Oaxaca, Galeotti, 6554 (K) ; 

 [Laguna de la Haciendo, Schiedc] . Canada, Bilcmek, 474 (G, 

 K); Orizaba? MOller, 48 (E); Cordoba, Bourgeau, 1645 (N). 



' This species can be easily distinguished from P. rcmotispora, 

 which it closely resembles in size and habit, by its free veins and 

 its inner row of sori located near the midrib. The original was 

 collected by Schicde and Dcppe as noted above. 



5. Phanerophlebia umbonata sp. nov. 



Rootstock stout, solid : stipes i 5-30 cm. long, pale brown with 

 a few broader scattered scales in the lower portion, and a consid- 

 erable number of narrow slender ones above which also appear 

 throughout the rachis : leaves 35-50 cm. long, with 25-38 pinnae 

 which are 9-16 cm. long, 2-2.5 cm. wide, with an_ acute or ob- 

 tusish base and tapering apex ; margins bristly, the bristles scarcely 

 projecting ; veins free, very closely placed, usually three times 

 forked all the branches except the first extending to the margin : 

 sorl in about two rows, with a few scattering outliers, the mncr- 

 most row about 4 mm. from the midrib ; indusia remaining flat, 

 with a central depression, and the center elevated into a distinct 

 umbo. 



Monter 



J 



This plant was at first considered by Mr. Davenport as distinct 

 from juglandifoliimi as indicated in our correspondence. The 

 plant was issued in Mr. Pringle's sets without a specific name, but 



M 



difoli 



has become through its treatment at Kew. American botanists of 

 the past generation heive regarded this treatment as authoritative, 

 in spite of the vigorous protests of Moore, John Smith, Fee, 

 Fournier, Mettcnius and Kunze, variously expressed in the litera- 

 ture of the past forty years. ' 



*Two pinnae " ex herb Gray. 



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