714 JTJNGERMAtfNIACEJB. (SCALE-MOSSES.) 



the valves. Antheridia 3 - 20, in the axils of small saccate leaves, which are 

 scarcely imbricate or crowded into terminal heads. (Name from <TKa,ira,viov t a 

 ihovely from the form of the perianth.) 



* Leaf-lobes somewhat equal. 



1. S. SUbalpina, Dumort. Leaves equidistant, imbricate, cleft nearly to 

 the middle, the roundish obtuse lobes denticulate on the outer margin ; peri- 

 anth much exceeding the involucral leaves, obovate from a narrow base, 

 denticulate. Mountains of N. Eng. ( Oakes, Austin) ; L. Superior ( Gillman, 

 Macoun). (Eu.) 



2. S. glaucocephala, Aust. Stems short, cespitose, creeping or as- 

 cending, subsimple, with numerous offshoots ; leaf-lobes broadly ovate, entire, 

 mostly obtuse and apiculate ; involucral leaves sometimes denticulate ; peri- 

 anth small, subcuneate, entire. (Jungermannia glaucocephala, TayL; S. 

 Peckii, Aust.) On rotten wood, N. Eng. to N. Y. and Canada. 



* * Lower lobe about twice the size of the upper > except near the summit. 

 - Leaves broader than long ; upper lobes rounded or blunt. 



3. S. undulata, Dumort. (PI. 24.) Ascending or erect, slightly branched ; 

 leaves lax, spreading, entire or ciliate-denticulate, the lobes round-trapezoidal, 

 equal at the summit of the stem; perianth oblong-incurved, nearly entire, 

 twice as long as the outer involucre. In woods, damp meadows, and rills; 

 common, especially in mountain districts. Var. PURptREA, Nees; a form 

 with long lax stems and rose-colored or purplish leaves. (Eu.) 



4. S. irrigua, Dumort, Creeping ; leaves somewhat rigid, repand, deeply 

 lobed ; lobes rounded, submucronate, the lower appressed, the upper convex 

 with incurved apex ; perianth ovate, denticulate. (S. compacta, var. irrigua, 

 Aust.) Wet places, N. J., Catskill Mts., mountains of N. Eng., and north- 

 ward. (Eu.) 



i- - Leaves longer than broad ; upper lobes more or less acute. 



5. S. nemorbsa, Dumort. Rather stout, flexuose, creeping at base, 

 leaves rather distant, decurrent on both sides, ciliate-dentate, the lower lobe 

 obovate, obtuse, slightly convex, the upper cordate, acute, concave ; perianth 

 densely ciliate; capsule large, roundish-ovate, reddish-brown. (S. breviflora, 

 TayL) On rocks, etc., in swamps and rills ; common and variable. (Eu.) 



6. S. Oakesii, Aust. Leaves obovate, somewhat spreading, often de- 

 flexed, closely complicate, convex, the lower lobe coarsely dentate, and with 

 deep purple spur-like teeth on the keel, the upper roundish and less dentate 

 perianth usually dentate. White Mts. (Oakes, Austin). 



# * # Lower lobes 3-4 times the size of the upper. 



7. S. exsdcta, Aust. Ascending ; leaves subcomplicate, entire, the lowei- 

 lobe ovate, acute or bidentate, concave, the upper small and tooth-like ; invo- 

 lucral leaves 3-5-cleft; perianth oblong, obtuse, plicate. (Jungermannia ex- 

 secta, Schmidel.) High mountains, far northward; rare. Perhaps better 

 retained in Jungermannia. (Eu.) 



8. S. umbrdsa, Dumort. Stems short, decumbent, slightly branched; 

 leaf -lobes ovate, acute, serrate ; perianth incurved, naked at the mouth. 

 White Mts.; rare. The tips of the shoots are frequently covered with a 

 dark mass of gemmae. (Eu.) 



