JUNGERMANNIACE^E. (SCALE-MOSSES.) 719 



ing, decurrent dorsally, pale green ; involucral leaves separate ; perianth 

 exserted, obovate-oblong, the mouth 4-cleft ; capsule globose. Mountains 

 of N. Eng. (Austin); rare. (Eu.) 



3. J. pumila, With. Stems creeping, the tips somewhat ascending, 

 subsimple, rooting, pale ; leaves ascending, ovate, obtuse, concave, entire ; 

 involucral leaves like the cauline, erect; perianth terminal, fusiform, plicate 

 above and denticulate ; capsule oval. On shaded rocks along rivulets, Clos- 

 ter, N. J. (Austin). (Eu.) 



2. LOPHOZIA. Leaves roundish or subqiiadrate, bidentate, bifid, or some- 

 times 3-5-c/eft ; underleaves none, or small and mostly 2-parted ; perianth 

 usually strongly plicate. 



* Underleaves present. 

 i- Leaves bifid or 2-lobed. 



4. J. Gillmani, Aust. Stems short, densely cespitose, prostrate, strongly 

 radiculose ; leaves vertical, round-ovate, subcoucave, bifid, the lower leaves 

 with usually acute sinus and lobes, the upper much larger with rounded lobes 

 and obtuse sinus ; underleaves entire or the broader bifid ; perianth without 

 iuvolucral leaves, dorsal, sessile, obovate, subgibbous, ciliate, at length much 

 incised. In a sandstone cave, Traiue Island, L. Superior (Gil/man). 



5. J. Wattiana, Aust. Stems rather thick, 2-4" long, fragile, subflex- 

 uose, strongly radiculose ; leaves subvertical or spreading, subovate, concave, 

 emarginately 2-lobed, the lobes acute or the upper obtuse ; underleaves some- 

 what obsolete, hair-like or subulate, incurved ; iuvolucral leaves little larger, 

 less deeply lobed ; perianth terminal, small, ovate-gourd-shaped, whitish, ciliate. 

 On the ground, northern shore of L. Superior (Macoun). 



t- -t- Leaves 3 - 5-cleft. 



6. J. barbata, Schreb. (PI. 25.) Procumbent, sparingly branched; 

 leaves roundish-quadrate, with obtuse, acute, or mucronulate lobes and obtuse 

 undulate sinuses ; underleaves broad, entire or 2-toothed, sometimes obsolete ; 

 perianth ovate, plicate-angled toward the apex, denticulate. On rocks in 

 mountain regions ; common. (Eu.) 



Var. attenuata, Martius. Ascending, with numerous offshoots; stem- 

 leaves semi-vertical, obliquely spreading, roundish, acutely 2-4-toothed, those 

 of the shoots closely imbricate, premorsely 2 - 4-denticulate ; involucral leaves 

 two, 3-toothed ; perianth oblong. In similar localities. (Eu.) 



7. J. setifdrmis, Ehrh. Erect or ascending, dichotomous; leaves 

 toothed at base, 3 - 4-cleft, the lobes ovate-oblong, acute, channelled ; under- 

 leaves ciliate-dentate at base, deeply bifid, the divisions lanceolate, acuminate ; 

 involucral leaves more toothed than the cauline ; perianth terminal, oval, 

 plicate. Alpine summits of N. H. (Oakes). (Eu.) 



* * Underleaves wanting. 

 i- Leaves 2-toothed ; involucral leaves 2-4-cle/t. 



8. J. alpestris, Schleich. Stems creeping, crowded, bifid-branching, the 

 ends ascending; leaves semi-vertical, ovate-subquadrate, obliquely toothed, the 

 teeth unequal, acute or mucronulate, distant ; involucral leaves wider, 2 -3-cleft ; 

 perianth twice as long, oblong, smooth, the mouth complicate ; capsule oval. 

 Alpine region of N. H. (Oakes). (Eu.) 



