684 323. Riccardius. 13. HEPATIC. Pl. cell. fol. 
fringed; calyptra exserted ; capsule oblong, 4-valved ; 
valves streaked lengthways and crossways; elaters in tufts, 
pencilshape, on the tip of the valves ; helices single, spindle- 
shape.—Thallus fleshy, ribless, compressed, branched. 
® 
1. Riccardius multifidus. Many-cut riccardi. 
Thaili in crowded tufts, linear, ribless, compressed, 
branched pinnately ; calyx marginal ; calyptra tuberculated. 
Lichenastrum ambrosie divisura, Dillen Musc. : 
Jungermaunia multifida, Lin. S. P. 1602; Engl. Bot. 186; Hooker 
Jung. 45. 
Jungermannia palmata, Hedw. Theor. 159. 4 
On moist heaths and ditch sides; spring. 
6. sinuatus. Thallus broad, branched; edge sinuated. 
Ulva palustris foliis ivee moschate instar divisis, Déllenin Raii Syn. 
64, 10. 
Jungermannia sinuata, Dicks. Crypt. 2,16; Engl. Bot. 1476. 
2. Riccardius pinguts. Fat riccardi. 
Thallus oblong, ribless, lying down, above flattish, be- 
neath swollen; branched vaguely, edges sinuated; calyx 
uuder the edge; calyptra smooth. 
Jungermannia pinguis, Lin. S. P. 2, 1602; Engl. Bot. 185; Hooker 
Jung. A6. 
In moist shady places and shallow pools; summer. 
8. angustior. Thallus long, nearly linear, simple or ra- 
ther pinnately branched. 
3. Riccardius dichotomus. Two-forked riccardt. 
Thallus linear, compressed, forked, branched. 
Ulva palustris furcata, angustioribus et firmioribus segmentis, Dillen in 
Raii Syn. 63,9. 
Riccia fluitans, Lin. S. P. 1686; Engl. Bot. 251. 
In ditches, stagnant waters, and damp places. 
a 
X. $24. ~sKE- RB ees Tp MA or cé tie Herbert. 
Dioicous. Mar. Anihers roundish, dispersed among 
the perigonial scales ; pedicells short ; perigonium-scales 
jagged.—F rm. Calyx from the upper surface of the mid- 
rib, double; outer short, jagged, herbaceous; inner nearly 
cylindrical, membranaceous; mouth cut on one side, ra- 
ther toothed ; capsule oblong, 3 or 4-valved ; valves streaked 
lengthwise and crosswise; seeds spherical; e/aters long, 
attached to the inner valves; helices double, closely twisted. 
—Thallus frondose, thin, mid-ribbed. 
