LEJEUNEA CAVIFOLIA 151 
we can avoid any confusion which might arise from the use of Li- 
bert's name by restoring to Libert's species the still older name 
“ cavifolta," of Ehrhart, a course which Lindberg and others have 
already adopted. 
L. patens has not before been recorded for America. Its dis- 
covery in Newfoundland and in the neighboring island of Cape 
Breton shows quite conclusively that its range is northern, and 
that it does not belong to that group of subtropical hepaticae 
which are characteristic of the southwestern corner of Ireland. 
The species has been illustrated by Moore * and also by Pear- 
son.f Moore's figures bring out clearly the crenulations on the 
leaves and underleaves, an important character which Pearson's 
figures do not show. 
14. LEJEUNEA CAVIFOLIA (Ehrh.) Lindb. 
Jungermannia cavifolia Ehrh. Beitr. 4: 45. 1789. 
Jungermannia clavaeflora Nees; Martius, Fl. Crypt. Erl. 137. 
Jd. f. do. 1815. 
Lejeunea serpyllifolia Lib. Ann. Gén. Sc. Phys. 6: 374. pl. 
QU Fu 820 GLEN Syn Hep. 324. 1845 
Lejeunea cavifolia Lindb. Acta Soc. Sci. Fenn. 10: 43. 1871. 
Not Stephani. 
Lejeunea serpyllifolia, var. B cavifolia Lindb. /. c. 10: 485. 
1875. 
Lejeunea serpyllifolia, var. y Americana Lindb. p. p., l. c. 10: 
486. 1875. 
Lejeunea (Eu-Lejeunea) serpyllifolia Spruce, Hep. Amaz. et 
And. 262. 1884. 
Eulejeunea serpyllifolia Schiffn.; Engler € Prantl, Nat. Pflanzen- 
fam. 1°: 122, . 1893 
Pale to dark green, dull or glossy when dry, growing in depressed 
tufts or creeping over other bryophytes: stems prostrate, 0.07 mm. 
in diameter, irregularly branched, the branches widely spreading, 
sometimes few but usually abundant : rhizoids scanty : leaves imbri- 
cated, the lobes ovate, obliquely preading, plane to convex, 0.6 mm. 
long, 0.35 mm. wide, rounded to very obtuse at the apex, margin en- 
* Proc. Roy. Irish Acad. II. 2: 加 43. 1877. 
T Hep. Brit. Isles, pl. rz, 1890. 
1 Bol. da Soc. Brot. 4: 171. pl. 7. f. 5-7. 1886. 
