HEPATICJE. (LIVERWORTS.) 
685 
lyptra equalling the perianth, irregularly torn at the apex. Cap¬ 
sule oval, 4-valved. Elaters filiform, free, with two fibres. Inflo¬ 
rescence dioecious. Antheridia dorsal, on the midrib, covered by 
minute fimbriated perigonial leaves. Frond with a distinct mid¬ 
rib. (A personal name.) 
1. II. Lyellii* (Jungermannia, Hook.) Frond simple or 2-cleft, 
delicate in texture, oblong-linear, the margin sli«fKtly waved, entire 
or obscurely serrate (l l -4 r long, 3' , -5 n wide.) — On the ground, in 
wet, springy places. 
12. LEJEUNIA, Libert. Lejeunia. 
Fructification lateral or terminal, on proper branches. Involu- 
cral leaves two, deeply 2-lobed. Perianth oval or obovate, terete 
or angular, winged or ciliate-crested on the angles, the mouth 
3-4-lobed ; pistillidium single. Calyptra obovate, persistent, fur¬ 
nished with a style, rupturing below the apex. Pedicel short, 
jointed in rings, when dry zigzag. Capsule globose, membrana¬ 
ceous, pale, 4-cleft to the middle ; valves connivent. Elaters 
persistent, adherent to the tips of the valves, erect, the upper end 
truncate-dilated, with a single spiral fibre. Spores large, irregu¬ 
lar. Inflorescence dioecious. Antheridia on proper branches 
lodged in the ventricose base of imbricated 2-lobed perigonial 
leaves. — Foliaceous : stem-leaves 2-ranked, incubous : amphi- 
gastria present. (A personal name.) 
* Leaves 2-lobed , the lower lobe smaller. 
1. L,. serpyllilolia, Libert. Stems vaguely branched ; leaves 
with the upper lobe roundish-ovate , convex , the lower much smaller, 
obliquely ovate, involute ; amphigastria rounded, 2-cleft, its segments 
obtuse; perianth obovate, acutely 5-angled. — On moist rocks and 
frees, Alleghany Mountains. —A small pale-green species, with trans¬ 
parent loosely reticulated leaves. 
2. 1,. Clypeata, Schweinitz. Stems procumbent, somewhat 
pinnately branched ; leaves with the upper lobe round-obovate and de- 
flexed , the lower oblong, quadrate; amphigastria orbicular, approxi¬ 
mated ; perianth lateral, sessile, obovate, obtusely keeled on the back, 
2-keeled underneath, the margin rather compressed. — Alleghany 
Mountains; somewhat larger than No. 1, and firmer in texture, 
leaves whitish-green. 
* * Leaves undivided , inflexed beneath at the base , saccate or hooded. 
3. 1.. calcarea, Libert. Stems loosely and divaricately branched; 
leaves ovate , pointed , decurved , cellulose-echinate , inflexed at the base, 
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