184 FIELD COLUMBIAN MUSKUM BOTANY, VOL. i. 



PLAGIOCHILA VIRGINICA, A.W.Evans, Fl. W. Va., 497 (1892) Plate. 

 Growing in wide, depressed, and intricate tufts; stems ascend- 

 ing from a prostrate caudex, simple or sparingly branched, some- 

 times geniculate and rooting at the joints, otherwise eradiculose; 

 leaves contiguous or somewhat imbricated, widely patent, ovate 

 or rhomboid-ovate, the dorsal margin decurrent, slightly reflexed, 

 entire, the ventral margin plane or reflexed at base, mostly entire, 

 the apex broad, rounded or truncate, sharply and irregularly 

 spinulose; amphigastria none. 



Stems i to 3 cm. long, with the leaves i to 2 mm. wide; leaves 

 1.2 mm. long, 0.7 mm. wide; spines short, acute, separated by 

 rounded sinuses, varying in number from 2 to 8 on each leaf, 

 usually 4 or 5; leaf-cells averaging 0.023 mm. in diameter in mid- 

 dle of leaf, thin-walled and scarcely thickened at the angles. 

 Mercer: on walls of dry limestone cave, Beaver Spring (1550). 



PLAGIOCHILA PORELLOIDES Lindenb. 



HARPANTHUS SCUTATUS (Web. & Mohr.) Spruce. 



JUNGERMANNIA EXSECTA Schmid. 



MARSUPELLA Dumort. 



M. emarginata (Ehrh.) Dumort. 



Randolph Co., at Pickens, on clay bank of a small spring. 

 (MillspaugJi) 



PELLIA EPIPHYLLA (L.) Dumort. 

 METZGERIA CONJUGATA Lindb. 



(Nuttall}. 

 ANEURA MULTIFIDA (L.) Dumort. 



Aneura sessilis Spreng. 

 (Nuttall}. 



MARCHANTIACE.E. 

 MARCHANTIA POLYMORPHA Linn (Nntta/l). 

 CONOCYPHALUM coNicuM (L.) Dumort. 



