90 JUNGERMANNIACEAE 
times tinged proximally with purple, springing in older parts of 
elongated cells; leaves obliquely inserted, linguiform or oval, 
succubous, rather close, translucent, scarcely decurrent dorsally, 
often crowded and suberect at stem-apex, marginate, 1.7-4 шш.х 
I.4-2 mm., commonly concave below, apex decurved; cells of 
the margin quadrate or oblong, equaling in 'size the adjacent or 
twice as large; other leaf-cells mostly quite regularly pentagonal 
or hexagonal, 25-70 и in diameter, oblong and larger towards the 
base; all with conspicuous trigones: underleaves free, often wine- 
colored, .6-1 mm. long, bifid 14—24 their length into narrowly 
lanceolate or subulate segments, usually running out into a single 
series of cells at apex, concealed by the dense mat of root-hairs 
except in the younger portions of the stem: perigynium tubular, 
1—1 % mm. in diameter, and, with the free portion of the perianth, 
3-4 mm. long, erect or ascending, nearly at right angles with the 
stem, tinged with purple ventrally, bulbous or saccate at base; wall 
of perigynium-tube 5-20 cells in thickness: 9 bracts 2-4 pairs 
(commonly 3 pairs), entire or repand, similar in form to the cauline 
caves, margins approximate at base dorsally, distant ventrally; 
uppermost pair inserted at about middle of perianth-tube or, more 
rarely, at two thirds its height, erect, apex and dorsal margins 
narrowly reflexed and exposing the perianth, or closely appressed 
and wholly concealing it; next lower pair usually inserted at about 
one third height of perianth-tube, more broadly reflexed ; the one 
or two basal pairs but slightly attached to perigynium; bracteoles 
inconspicuous, sometimes subentire and slightly adherent to 
base of bracts; bulbus of perigynium without radicles, buta 
base of the free 
antheridia (1 
spikes of 3-6 pairs of leaves decreasing in size upwards, appressed, 
apices patent or recurved, or, in uppermost pair, erect ; anther! 
1 
1 е 
unicellular, 10-24 и in diameter: capsule long-cylindrical ; valves 
very slender, 3.3-6 mm. X.13-.17 mm., widely spreading when 
