306 Alexander W. Evans, 



8. Plagiochila flavescens Gottsche 



Plagiochila Guilleminiana j-! flavescens G. L. & N. Syn. Hep. 644. 

 1847. 



Plagiochila jlavescens Gottsche, Mex. Leverm. 148. pi. 7. f. 1—3. 

 1863. 



On live wood, Lucma, 7,000 feet, August 7, 1911. 



Originally collected by Licbmann in the province of Oaxaca, Mex- 

 ico, and later reported by Jack and Stephani from either Colombia 

 or Peru, in their account of Wallis's Hepaticae.^ The determination 

 of the material from Lucma is based on the figures and description of 

 Gottsche. The plants bear a strong resemblance to P. Guilleminiana 

 Mont., a species listed below, but are somewhat more robust. The 

 leaves, moreover, are relatively broader, the dilated portion at the 

 postical base being very conspicuous and forming striking crests. 

 The leaves measure about 4 mm. in length (including the dilated por- 

 tions) and about 3 mm. in width. Leafy propagula are present in 

 abundance. 



9. Plagiochila Footei sp. no v. 



San Miguel, 5,000-6,000 feet, July 24, 1911. Named in honor 

 of Professor Harry Ward Foote, the collector. 



Pale green, varying to brownish green, not glossy, growing in loose tufts : 

 stems mostly 3—6 cm. long and 0.35 mm. in diameter, more or less rigid, 

 simple or sparingly branched, the branches all intercalary, similar to the 

 stem but sometimes with somewhat smaller leaves: leaves subopposite, 

 distant to subimbricated, obliquely spreading (at an angle of about 45 de- 

 grees), strongly convex, broadly ovate, about 2 mm. long and 1.6 mm. wide, 

 narrowly decurrent both antically and postically, the antical margin extend- 

 ing a Httle farther backward than the postical, antical margin sUghtly revo- 

 lute toward the base, straight or somewhat outwardly curved, entire, postical 

 margin strongly outwardly curved from the narrow decurrent portions, 

 sharply dentate-ciUate, apex rounded with more crowded teeth than the 

 postical margin ; total number of teeth mostly twelve to fifteen, unequal, 

 acuminate, mostly three to six cells long and one to four cells broad at the 

 base ; leaf-cells plane, averaging 22 u at the apical margin, 35 X 30 /" in the 

 middle, and 50 X 25 u at the base, walls thin but with minute triangular 

 trigones with concave sides ; cuticle smooth : remaining parts not seen. 

 (Fig. 3.) 



Although at first sight the leaves in this new species appear exactly 

 opposite, closer inspection shows that the decurrent bases on one side 

 of the stem extend a little farther backwards than those on the other, 

 and this is true both antically and postically. The line of insertion 



^ Hedwigia 81 : 14. 1892. 



