KEY TO THE GENERA AND SPECIES OF BRITISH MOSSES, 45 
Descrivtion or Pirate 302. 
The plant may grow from its own roots (43), or from a persistent, 
green, conferva-like protonema (42). 
may be smooth (2), or villous (62) ; simple (1, 43), or more 
or le tahched : the branches being pinnate (7), bipinnate (8), or 
irre, 
: e leaves are either stem-leaves (i.¢., those growing on the main 
dein, beknak: leaves, or perichetial-leaves (61). 
In direction they may be distichous or two-ranked (1), complanate, 
i.€., compressed so as to appear as if distichous (2), imbricate (8, 4), 
secund (5), squarrose On: or — ae 
In shape they may be orbic oe (9), apborle ee 
fr (11), ovate (12), rai (13), 8 e (14), seta 
lingulate or oblo ong ae linear (17), falcate ee gaint (19), alaska oy 
undulate (16), auricled (80), decurrent (38), or with sheathing lamina at 
base (3: i 
Fied may be acute (12, 39), acuminate (18, 14), apiculate (23), 
obtuse “ *9), cucullate (22), mucronate (20), cuspidate (21), diaphanous 
or palin — 0). 
rgin cape wd oe (9, 10, 11), serrate a?) oon (24), 
cies wie narrow cells (25), or with thickened border (26 
i bese may se smooth, or finely (27) or coarsely ae papillose. 
¢ may be absent (13), pie , ; 12), double (16), excurrent 
(11, eu eroded ere Ha Boece (10), or g in (39) or below (9, 18) 
e apex, and may bear lamellz o: ine ate ea ci). 
The cells age be quadrate (35), rounded (36), hexagonal bt flat 
, hexagono-rhomboid (38), jinear'¢ (8), nodulose (37), containing 
at fibres (3 1); parenchyma tous, 4. 2.€., with bpboaligg Mattoned ends 
(32, fig 37), or prosencbymatous, 7. ¢., with overlapping pointed ends 
(31, 33, 34). 
The fruit may be terminal (42, 43), or lateral (61). 
The > may be = ayes a (42), or exserted (43); opening by 
its (44), or with (45 » 66) or without (42, 46) a deciduous lid; 
erect aed 28) Teilioea G 66), cernuous (49), pendulous (45), regular 
), 0 nat 
on or veg o. cylindric ay ), pyriform (45), angled (55), with a long (66) 
or strumous (56) neck, or with a swollen apophysis (53); — (2), or 
smooth (48, 50); with the mouth open (47), or partly 
i (59). 
The peristome may be absent (54), single (48, drs bee or eh iome (49); 
the teeth may be entire (48, 53), cloven (68), p d (57), twisted (50), 
connected by a tympanum (51); either erect (48) or reflexed. (53, 57), 
The lid may be convex, conic, mamillate (45), rostellate (66), or 
rostrate or beaked (55). 
The calyptra may be mitriform (63), dimidiate (64), cucullate (65). 
Gemme occur either separately, or gathered in terminal cups (67), or 
heads. 
