376 WEISIA CRISPATA IN BRITAIN. 
condition, and I have no hesitation in referring them all to the 
plant a as W. crispata by Limpricht. 
I am not in a position to discuss the correctness of Limpricht’s 
views as sais the plant of Nees and Hornschuch, or as to its identity 
with the W. gymnostomoides of Bridel, but I have no reason to doubt 
their accuracy. Nor do I propose to pat here the claims of 
crispata to specific rank; my purpose is solely to record it as a 
British plant, and to point out how Limpricht’s view clears up 
some difficult points in the relationship of this group - species, 
about ehioh there has been, and still exists, much confus The 
characters of W. crispata as described by Li papas are as least 
=. defined ; and if those which distinguish it from W. tortilis 
n the one hand and JW. viridula on the other are ate of the 
chisel importance, the same may be said of several others of the 
oup. 
W. crispata differs from W. tortilis in no character of any 
importance but the presence of a rudimen tary but quite distinct 
more a inc frequently occurs in that plant, pastes in the 
forms that pass under the nam ek: var. era ylindricum SonDem ., with 
in its widest sh gical from 80 » to 40 » in width, no ot often 
one 50 , and very rarely indeed slightly remoosding that 
In the second, which may be termed the ‘tortilis” type they 
are — less tapering above, frequently markedly obtuse at apex, 
— 8 more widely enrolled, often so as to ah to the 
nerve, which itself is stout, red, often indeed reddish in the young 
leaves, and much wider, usually i in its widest part from 60 to 80 p, 
meer hc more, reaching as much as 100 »; and rarely so narrow 
Under the first head come W. viridula and pies me — — 
the second group comprises W, tortilis and W. W. 3 
stoma also differs from all the others in the eaten ae 13-25 ‘ 
in diameter, in wish respect it agrees with W. mucronata. In the 
thera the diameter of the spores is about 12-18 p. W. microstoma 
is marked too by a usually shorter seta, and a shorter and smaller 
capsule, than in either W, tortilis or W. crispata. W. viridula has 
