— so- 



on trees and fallen logs. Virginia, Tennessee, and Georgia. It is also 

 found in Western Europe, and* the type specimen was collected in Ireland 

 by Taylor. Fruiting material is rare. The acute lobes of its leaves and the 

 emarginate-bifid underleaves with rounded divisions distinguish it from all 

 other Lejeunese of the United States. In the tropics, however, it has an 

 abundance of relatives. 

 Lejeunea patens Lindb. 



Plants pale or dark green, slightly glossy when dry, caespitose: stems 

 copiously branched: leaves imbricated, the lobe ovate, widely spreading, 

 strongly convex, rounded and decurved at apex, margin distinctly crenulate 

 from projerting cells, antical margin arching across the stem ; lobule 

 strongly inflated, ovate, mostly crenulate, apex tipped with a single blunt, 

 projecting cell : cells of lobe convex: underleaves distant, about the size of 

 or a little smaller than the lobules, orbicular, gradually narrowed to base, 

 bifid about one-half, apex of lobes varying from obtuse to acute, sinus vary- 

 ing from acute to obtuse, margin crenulate: inflorescence autoicous : female 

 sometimes on leading branch, sometimes on short one ; perianth half ex- 

 serted, oblong-obovoid, gradually narrowed toward base, rounded above and 

 with short beak, terete below, sharply flve-keeled above, keels crenulate 

 from projecting cells, becoming blunter with age: male spike on short 

 branch; antheridia in pairs. Found on rocks. Localities: — Ireland (type — 

 Lindberg), Great Britain, Norway; and, in America, Newfoundland and 

 Nova Scotia. May be found in northern borders of the United States, or in 

 mountainous regions. 



Lejeunea. cavifolia. (Ehrh.) Lindb. {Lejeifuca serpynifolia. Lib.) {L. sei'- 

 pyliifoHa xsiV. cavifolia Lindb.) (/,. scrpyllifolia var. Aincj'icana. 

 Lindb., in part.) {Enlej eunca scrpyllifolia Schiffn.), 



Plants pale to dark green, dull or glossy when dry, in tufts or creeping 

 over other bryophytes: branches spreading, usually abundant: leaves im- 

 bricated, lobes ovate, obliquely spreading, rounded to obtuse at apex, mar- 

 gin entire or nearly so; lobule strongly inflated, ovate, scarcel}^ crenulate: 

 underleaves distant, as large as or a little larger than the lobule, ovate- 

 orbicnlar, gradually narrowed toward base, neither decurrent or rounded, bifid 

 about one-half with rounded to acute lobes, margin entire or nearly so: in- 

 florescence antoicous ; female on leading branch, sometimes on short branch ; 

 perianth about half exserted, oblong to oval-oblong from narrowed base, 

 rounded or truncate at apex with short, slender beak, terete below; sharply 

 keeled in upper part, the keels smooth. 



This plans grows on rocks and trees. The range is from Ontario, New 

 Hampshire and Pennsylvania, to Minnesota and Wisconsin. Has been dis- 

 tributed in Hep. Bor. Am. 97 (in part), and in Hep. Am. 8 (As Lcjctinca scr- 

 pyllifolia. 



Lejkunea Americana (Lind. ) Evans iyl.cjcitnca scrpyllifolia var. Ameri- 

 cana Lindb. — in part.) Fig. 3. 



Pale, whitish or yellowish green, closely appressed or in depressed 

 mats: stems irregularly pinnately branched: leaves imbricate, the lobe 

 ovate, widely spreading, rounded to obtuse at apex, margin entire or 



