10b) Leaves entire, or toothed, or divided at tip into 2, 3, or
4 lobes. Figs. 214 to 224
11a) Leaves flat or curved, not sharply folded. Figs. 214 to
11b) Leaves two-lobed and folded, one lobe pressed firmly against
the other. Figs. 220 to 224
12a) Sporophyte borne In a perianth which is at the end of a dis
tinct shoot. Figs. 2U to 217
12b) Sporophyte borne from a small lateral or ventral bud; plants
easily seen, often large; perianth 3 angled with one angle ven
tral. Figs. 218 and 219
13a) Plants brown or purplish, In dense tufts on very wet rocks. Leaves with a rounded notch and two rounded lobes, set transversely on the stem. Perianth shorter than the surrounding leaves and grown fast to them.
Fig.214. Marsupella emarginata Dum.;
a) fruiting plant; b) tip of plant with Involucral leaves; c) base of pedicel; dehiscing capsule.
On wet rock or floating In water. Usually restricted to mountain streams.
13b) Plants large (2 to 4 mm. wide) with leaves set very obliquely on the stem, succubous, with margins entire or sharply toothed.
Fig.215. Plaglochila Interrupta Dum.; a) fruiting plant; b) leaves in detail.
Occurs on moist banks and rotten logs.
13c) Leaves entire, or broadly and shallowly notched at apex. Un-
derleaves deeply divided into two long slender sharp lobes (entire
in Harpanshis). Perianth sharply triangular, with one edge upper.
Fig.216. Chiloscyphus ascendens H.& W.;
a) plant with sporophytes; b) leaves in detail and antheridium; c) Involucre; d) ripened capsule.
Found on decaying logs.
13d) Leaves entire or 2 or 3 lobed; under leaves entire or absent.
Perianth oval or obovoid.
Fig.217. a) Jungermannla barbata Sen.; b) Nardia crenulata Lin.
14a) Leaves with two or more notches at apex (3 or more lobed); the upper margin of one leaf overlapping the lower margin of the above.
Fig.218. Lepidozia reptans Dum.
Grows on soil and on rotten wood.
14b) Leaves entire or two lobed. The upper margin of one leaf covered by the lower margin of the leaf above.
Fig.219. Cephalozla multiflora Spr.
Grows on rotten wood and on the ground.
15a) Upper lobe of leaf smaller than
lower and only partly covering the
Fig.220. Seapania undulata Dum. Leaves are reddish or purplish.
15b) Upper lobe of leaf much larger than, and completely covering
the lower. Figs. 221 to 224
16a) Under lobe of leaf tongue-shaped, attached only at one end;
under-leaf tongue-shaped, conspicuous. Large plants; 3 to 8
Fig.221. Porella platyphylla Lind.
On rocks and trees in moist places.