WEISIA CRISPATA IN BRITAIN. 877 
the ee seta and often me more elongated capsule of W. crispata, 
le the of 
but as a rule capsule a much brighter, reddish brown 
cola not of that tes ci colour which soe cheaes W. micro- 
stoma and, perhaps in a less degree, W. tortilis and W. crispata. 
gr 
The characters of shen allied species may ws tabulated thus :-— 
Leaves slender, nerve 30- 
width, rarely | 
reaching 50 «4; leaf-mar- 
gin narrowly involute .. 
Leaves wider, — ou 
80 
( Peristomate .. Spores 12-18 u. W. viridula. 
Gymnostomous Spores 18-25 u. W. microstoma. 
oe Gymnostomous Spores 12-18 uw. W. tortilis. 
less than 50 us toga 
gin widely involute . 
Peristomate .. Spores 12-184. JW. crispata. 
I have not had an apport of examining a large number of 
specimens of ‘‘ Weisia viridula var. gymnostomoides,” but all that 
I have seen have the ‘tortilis’’ type of leaf, and should cinndoabssadly 
be placed under W. crispata. Whether or not there may be also a 
true variety of W. viridula with the aber as rudimentary as 
. crispata but with the ‘‘viridula”’ lea is of course another 
matter ; but Limpricht had evidently ates none, and I am inclined 
with him to doubt its existence. In that case the var. amblyodon 
-& 8. rophaaeih td the most degenerate type of ‘partons known in 
W. viridula. 
The mice here arrived at will, I fear, necessitate a con- 
siderable amount of rearrangement in herbaria; but I believe that 
u 
satisfactory basis. hether the prese of a rudimentary peri- 
ome is sufficient to separate |W. crispata rite from W. tortilis 
is of course another matter, which it is hardly needful to discuss 
here. Its sxiatones, % taken with the absence of any other reliable 
distinguishing character, may at least be held a strong argument 
against the unscientific a ration, generically, of Gy spicttonaie or 
Hy, pereeenste from Weisi 
Weisia crispata, like W. top tilis, is @ limestone plant by preference. 
Mr. Wheldon writes that it is abundant on the scar limestone of 
Ww : , : 
(Ingleton), as shown by specimens (labelled W. viridula var. gymno- 
stomoides) sent from there by Prof. Barker. I have also seen it from 
rows ‘‘in rock-crevices, its compact cushions bein pod distinct, 
as also its yellowish colour, rufous in the interior of the tufts. It 
is often associated with Funaria calearea and Bryum murale.” 
Other associates, Mr. Wheldon writes later, are Polygonatum offici- 
nale, Lastrea — Polypodium calcareum, Hypnum rugosum, and 
Scapania asp 
The list. st ‘localities _ given will probably be considerably 
ed to if herbarium specimens labelled W. tortilis and W. viridula 
var. gymnostomoides be cavetally ‘Manned for peristome and nerve. 
