On  the  Clova  Mountains,  in  shady  spots  where  water  has
stood;  gathered  there  by  a  well-known  trio  of  British
Muscologists,  Drs.  Hooker,  Arnott,  and  Greville.  Pr.  Sep-
tember. It  has  several  sets  of  shoots  rising  one  above  an-
other, according  to  the  years  in  which  they  have  been
produced,  the  last  series  being  alone  green,  the  others  dar-
kened by  the  snow-water,  with  which  it  is  in  most  cases  in
close  proximity.
13.  Bryum  argenteum,  Linn.  [Silvery  TJiread  Moss.)
Stems  branched;  leaves  closely  imbricated,  broadly  ovate,
suddenly  and  sharply  acuminated,  subserrulate,  very  con-
cave, the  nerve  disappearing  below  the  point ;  capsule  ovato-


BEYUM.  191

pyriform,  pendulous. — Eng.  Fl.  p.  60;  Mull.  8yn.  pt.  1.
p.  314.
On  wall-tops,  thatched  roofs,  and  by  waysides  everywhere.
Pr.  Spring.  This  pretty  species  can  hardly  have  escaped
the  notice  of  the  most  superficial  observer  of  nature's  works,
its  deep  silvery-green  tufts  are  so  different  from  any  other
Moss  around.  Its  compact  stems,  formed  by  the  closely
adpressed  leaves,  give  it  so  much  the  appearance  of  the
drooping  clusters  of  the  flowers  of  the  Hazel  and  Poplar,
that  Dillenius  called  it  the  "  Catkin-stemmed  Silver  Moss."
It  is  found  in  all  parts  of  the  world,  and  in  warm  climates
the  leaves  are  tipped  with  hairs  of  such  length,  as  to  give
them  the  appearance  of  tufts  of  wool,  whence  the  name  of
the  var.  lanatum,  or  "  woolly."

13.  Bryum  Zierii,  Dicks.  {Zierian  Thread  Moss.)
Stems  branched;  leaves  closely  imbricated,  more  or  less
broadly  ovate,  acuminate,  very  concave,  reticulated,  entire ;
nerve  running  nearly  to  the  point;  capsule  clavate,  cer-
nuous.— ^;z^.  Fl.  p.  60;  MUll.  Sijn.pt.  \.  p.  288.
