684 323. Riccardius. 13. HEPATlCiE. Pl.cell.fdL 
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- 
shap e,.— Thallus fleshy, ribless, compressed, branched. 
1. Riccardius multijidus . Many -cut riccardi . 
Thalli in crowded tufts, linear, ribless, compressed, 
branched pinnately ; calyx marginal; calyptra tuberculated. 
Lichenastrum ambrosiae divisura, Dillen Muse. 
Jungermannia multifida, Lin. S. P. 1602; Engl. Bot. 186; Hooker 
Jung. 45. 
Jungermannia palmata, Hedw. Theor. 159. ■ 
On moist heaths and ditch sides ; spring. 
(3. sinuatus. Thallus broad, branched ; edge sinuated. 
Ulva palustris foliss ivae moschatae instar divisis, Dillen in Raii Syn. 
64, 10. 
Jungermannia sinuata, Dicks. Crypt. 2, 16; Engl. Bot. 1476. 
2. Riccardius pinguis. 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. 46. 
In moist shady places and shallow pools; summer. 
/3. angustior. Thallus long, nearly linear, simple or ra- 
ther pinnately branched. 
3. Riccardius dichotomus. Two-forked riccardi . 
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. 
X. 324. HERBERTUS. Herbert. 
Dioicous. Male. Anthers roundish, dispersed among 
the perigonial scales ; pedicells short ; perigonium-scales 
jagged. — F em. 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 ; elaters long, 
attached to the inner valves ; helices double, closely twisted. 
- — Thallus frondose, thin, mid-ribbed. 
