84 JUNGERMANNIACEAE 
Leaves 3- or 4-cleft to below Ше middle ; the segments filiform-acumin- 
ate, entire ог more or less ciliate-fringed ; antheridia on the main stem 
or lateral branches ; perianth really acrogenous (7. e., terminal on main 
m or principal branches), but finally, through innovation, on a sho 
te lateral branch. 31. Ptilidium. 
Leaf-lobes 3-5, obtuse, wies е ог spinescently pointed, Ше 
sinuses зы extending to middle derleaves very differe nt ires 
the leaves, usually да у ыба ва d ciliate-fringed ; perianth 
acrogenous; plants usually large. 21. Lophosia ($ Barbatae, not yet 
d in California). 
Leaves divided to the base into 2-4 capillary segments ; uc. similar. 
9. Blepharost ma. 
Leaves entire or dee тешве at apex (sometimes н іп quies 
Leaves incubous ‚ the anterior margin nth the posterior margin of 
the next leaf in Haya underleaves suborbicular to ovate, emarginate or 
bifid; Ф branch a fleshy almost жене xeu sac depending from 
the axil of an underleaf. 27. Kantia. 
Leaves succubous (2. e., the anterior margin covered by the posterior margin 
of the next bui in front 
: Plants with creeping, nearly or quite leafless, rhizomatous primary stems - 
and ascending foliose branches ; leaf-margin usually more or less den- 
tate ; underleaves minute, subulate and entire or 2- or 3- her 
22. ochila. 
Plants gru rhizomatous primary stems ; leaves without or teeth 
(but often retuse or bilobed at apex in Lophocolea heterophylla). 
ней when present, in tufts at the base of the underleaves; 
Ф branch lenger, bracts (© bes 2) 3-5 pairs; paroico 
3. Lophocolea (2. heter Юта 
Root-hairs long and numerous, ы from nearly all parts of the 
often reddish-purple ventral surface of the stem; leaves mostly 
linguiform, margined by a row of enlarged cells, trigones conspic- 
uous; capsule debiscing spirally, the valves very long ands ender. 
18. С y 
Underleaves wanting Сонари ог present only in association with the 9 bracts.* 
Leaves peee bilobed. 
Ven 
lobe much the smaller; root-hairs springing from a mammilliform 
piae of the ventral lobe near its base. 3. Radula. 
Ventral lobe dn larger (the two lobes rarely equal) ; root-hairs springing from 
the stem. 
Perianth strongly Teren dorso-ventrally (parallel with the plane of | 
the “frond” ); fold of the leaf o acute, often alate ; root-hairs 
commonly са on the foliose branches 32. Sca apania. 
х ChiloscybAu AE " E EROS mnderleaves- у 
аге commonly ‹ destro estroyed or wanting dpt in the youngest parts, where, however; they d | 
may always ђе demonstrated. 
