HEPATICJE. (LIVERWORTS.) 693 



24. J UN GERMAN NI A, L. SCALE-MOSS. (Tab. 22.) 



Fructification terminal on the main stem, or on a short branch. Involucral 

 leaves free, like or urlike the stem-leaves. Perianth tubular, moie or less an- 

 gled; the mouth laciniate. Calyptra included, rarely projecting. Capsule 

 globose or oval. Elaters with two spiral fibres. Antheridia in the base of in- 

 flated perigonial leaves. Stem-leaves entire, or 2- many-lobed. (Dedicated to 

 Jungerinann, a German botanist of the 17th century.) 



* Leaves and amphiyastria alike, 2-4-parted. 



1. J. triciiophylla, L. Stems flaccid, Ijranched; leaves and amphi- 

 gastria 3-4-parted; the divisions straight, spreading, bristle-form, each com- 

 posed of a single row of tubular cells ; fruit-bearing branch lengthened ; perianth 

 nearly cylindrical, contracted and toothed at the mouth. Decayed wood, &c. 

 A minute, pale-cobred species. (Eu.) 



2. JT. setacea, Weber. Leaves and amphigastria 2-3-cleft; the divis- 

 ions incurved, each composed of two rows of cells ; fruit-bearing branch short ; 

 mouth of perianth ciliate. On the ground, &c. Smaller than No. 1, brownish- 

 colored. (Eu.) 



* * Leaves 2-cleft or (from No. 7-11) 2-6-dejl: amphigastria none, except in 

 No. 7 and 8. 



3. JT. COimivens, Dickson. Stems creeping, flexuous; leaves nearly 

 orbicular, with a broad decurrent base, distant, a little wider than the stem, 2- 

 cleft to ^ or J of their length, the' sinus obtuse; segments acute, connivent; 

 areolation large ; involucral leaves 3 - 5-cleft ; perianth slender, the mouth 

 lacerate-ciliate. On rotten wood. (Tab. 21.) (Eu.) 



4. J. Clii'Vifolia. Dickson. Fruit-bearing branch short; stems creep- 

 ing ; leaves imbricated, ascending, nearly orbicular, inflated at the ventral base, 

 lunately 2-cleft ; the segments long-linear, iuflexed ; involucral leaves erect, 

 2 - 3-cleft, serrate ; perianth narrow, plaited-triangular, the mouth denticulate. 

 Rotten logs, &c. (Eu.) 



5. J. bicuspid Tita, L. Fruit-bearing branch short; stems loose, pro- 

 cumbent ; leaves distant or crowded, half vertical, ovate, a little wider than the 

 stem, 2-cleft to the middle, the sinus obtuse ; segments acute ; involucral leaves 

 spreading at the apex, 2 -5-cleft, repand-serrulate ; perianth elongated, the 

 mouth denticulate. A small and common species. (Eu.) 



6. J. divaricata, Engl. Bot. Fruit-bearing branch elongated ; stems 

 prostrate, rigid, thick ; leaves distant, spreading, rather fleshy, equalling the 

 stem in diameter, oblong, the sinus and segments acute ; involucral leaves nu- 

 merous, imbricated, 2-3-cleft, serrulate; perianth oval, plaited above; the 

 mouth membranaceotts, denticulate. (J. byssacea of authors.) Among Mosses 

 and on decayed woods. A minute, dark green species. (Eu.) 



7. J. setiformis, Ehrhart. Stems erect or ascending, and, with the 

 leaves, terete-sulcate ; leaves toothed at the base, 3-4-clcft; the lobes chan- 

 nelled^ ovate-oblong, acute; amphigastria ciliate-toothed at the base, deeply 

 2-cleft, with lanceolate segments ; perianth oval, plaited. Alpine regions of 

 the White Mountains, Oakes. (Eu.) 



