680 
HEPATICjE. (liverworts.) 
Amphigastria absent. 
27. Scapania. Perianth compressed, truncate. Leaves 2-lobed. 
28. Plagiochila. Perianth compressed, truncate. Leaves not 2-lobed. 
29. Sarcoscyphus. Perianth and involucre united. Leaves 2-lobed. 
30. Gymnomitrium. Perianth wanting. Leaves 2-lobed. 
Suborder I. RICCIACEJS. The Riccia Family. 
Mostly floating, frondose little annuals, with both kinds of 
flowers and the fruit immersed in the frond. No involucre, 
perianth, nor elaters. Capsule irregularly bursting. 
1. RICCIA, Micheli. Floating Liverwort. 
Fruit immersed in the lobed or cleft frond. Calyptra coherent 
with the sessile globose capsule, crowned with the persistent style. 
Spores angular. Inflorescence monoecious or dioecious. (Named 
for Ricci , an Italian botanist.) 
* Terrestrial: frond icithout air-cavities. 
1. R« glauca, L. Frond someichat starry-lobed ; divisions lin- 
ear-obovate , emarginate-lobed, channelled, dotted, glaucous , membra¬ 
nous along the margin.— On moist ground. 
* * Floating (on still waters) : frond with large air-cavities. 
2. R. nutans, L. Frond inversely heart-shaped, channelled 
(4' to |* broad), clothed beneath with long and pendent roots, in the 
form of linear-lanceolate serrate purple fringes. 
3. R. fluitans, L. Frond radiately expanding from a centre 
(V wide or more); divisions narrowly linear,repeatedly forking, near¬ 
ly membranaceous, thickened, emarginate and cavernous at the apex. 
Suborder II. ANTHOCEROTEiE. The Anthoceros Fam. 
Terrestrial frondose annuals, with the fruit protruded 
from the upper surface of the frond. Perianth none. Cap¬ 
sule pod-like, 1-2-valved, with a free central columella. 
Elaters none or imperfect. 
2 . NO TO THY LAS, Sulliv. (Carpobolos, Schoeinitz.) 
Involucre a protrusion of a portion of upper stratum of the frond, 
opening irregularly at the apex. Perianth none. (Calyptra 
none?) Capsule included in the involucre, oblong, spheroidal, 
flattish, or ovate-cylindrical, slightly pedicelled, dehiscing either 
in a 2-valved manner from the apex halfway down by a suture, or 
