JUNGERMaNNIACE^, (SCALE- mosses. J «2!i 



16. J, Helleriana, Nees. (PI. 25.) Creeping, entangled • leaves spreaa 

 ing, subascendiug, cleft J-^ their length, the lobes equal, acute, entire or ser- 

 rate ; involucral leaves 2 -3-cleft, spinulose-serrate ; perianth ovate, the mouth 

 contracted. — On rotten wood, N. Y., N. Eug., and northward. (Eu.) 



§4. GYMNOCOEEA. Leaves 2-lvbed ; uudtiieaves none; involucral leaves 

 like the caidine ; perianth pedunculate, denticulate. 



17. J. inflata, Huds. (PI. 25.) Procumbent or ascending, loosely radicu- 

 lose, branching; leaves semi-vertical, roundish-elliptic, inequilateral, tlie sinus 

 and unequal lobes obtuse; perianth terminal or at length dorsal, oval or pyri- 

 form, smooth, the mouth connivent; capsule oblong. — On sterile ground and 

 rocks, N, J. {Austin), and northward in the mountains. (Eu.) 



25. MARSUPELLA, Dumort (PI. 2.3.) 



Stems dorsally compressed, with rootlets at the base and often producing 

 somewhat leafless runners. Leaves transverse, complicate-bilobed ; involucral 

 leaves 2 or 4, connate with the perianth. Perianth tubular or oval, subcom- 

 pressed parallel to the base of the leaves. Elaters free. Spores round, rufous 

 (in our species). Antheridia mostly terminal. (Name a diminutive of mar- 

 supium, a pouch, from the form of tlie perianth.) 



\. M. sphacelata, Dumort. Stems erect, subflexuous, pale brown; 

 leaves rather distant, concave, obovate to obcordate, somewhat clasping, the 

 sinus narrow ; dicecious ; involucral leaves larger than the cauline, cordate ; 

 perianth free at the apex, with 4-5 broad acute teeth ; antlieridia 1 - .3, in 

 short terminal spikes. — Wet rocks, mountains of N. Eug. to N. J., and south- 

 ward. (Eu.) 



2. M. emarginata, Dumort. (PI. 23.) Stems simple or innovating at 

 the summit, rigid, somewhat thickened upward ; leaves usually broader than 

 long, round-cordate or subquadrate, lobes obtuse or mucronate, sinus acute; 

 dioecious ; involucral leaves 4-8, usually larger, more deeply and acutely 

 emarginate ; perianth urceolate, the closed apex splitting into 4-5 triangular 

 lobes; antheridia 2-3, oval, axillary in terminal spikes. (Sarcoscyphus Ehr- 

 harti, Corda.) — On wet rocks, chiefly in mountain rivulets, N. Y. and N. Eng. 

 Floating forms are longer with distant leaves. (Eu.) 



3. M. adusta, Spruce. Stems minute, clavate; leaves (5-8 pairs) im- 

 bricate, round or broadly ovate from a sheathing base, acutely lobed with 

 angular sinus ; monoecious ; perianth included, campanulate, crenate becoming 

 irregularly lobed ; spores punctate ; antheridia 1 or 2, oval, in the axils of the 

 lower involucral leaves. (Gymnomitrium adustum, Nees.) — Alpine region 

 of the White Mts. (Oakes, Austin). (Eu.) 



26. N AUDI A, S.F.Gray. (PI. 25.) 



Stems laterally compressed, usually without runners. Leaves succubous, 

 subconcave or flat, the apex rounded, rarely retuse or bideutate ; underleaves 

 none (in our species). Monoecious or dioecious Involucral leaves 2-4 pairs, 

 connate at base. Perianth subcompressed laterally, connate with the involu- 

 cral leaves. Antheridia terminal on somewhat spike-like stems. (Named for 

 <S. Nardi, au Italian abbot.) 



