184 Field Columbian Museum — 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. 

 {Millspaugh) 

 Pellia epiphylla (L.) Dumort. 

 Metzgeria conjugata Lindb. 



{Nuttall). 

 Aneura multifida (L.) Dumort. 



Aneura sessilis Spreng. 



{Nut tall). 



MARCHANTIACE^. 

 Marchantia polymorpha Linn i^Nuttall). 

 CoNOCYPHALUM coNicuM (L.) Dumort. 



