2 77 
Grimmici subsquarrosa Wils., Rickeson, May /07, and St. Ishmael’s, 
Nov. /07, Pembroke (45), A.B. “ This seems to be the Pembroke plant 
referred to in The Handbook (Ed. II.) in notes under subsquarrosa. 
The bent stems with squarrose leaves enlarged to a coma seem 
constant characters, and the short basal areolation is often quite 
pronounced. In no case however does the latter character seem 
constant throughout a stem, some leaves at least showing longer 
cells near the nerve, a character allowed for by Mr. Dixon in 
description, and as far as I can see, the short basal cells are usually 
incrassate, while Mr. Dixon (see p. 562 under G. rctracta ) seems to 
hint otherwise. In crowded tufts the squarrose character of the 
leaves and the coma are less pronounced.” A.B. 
“ Probably this, but not typical. The long hair-point is peculiar, 
and the habit appears somewhat different from the normal. May it 
not be G. Lisa ? It ffts Boulay’s description of that plant in several 
respects, and, comparing it with a specimen so named from the West 
of France, I find a marked resemblance except as to the basal cells, 
which in the Welsh plant are shorter and more incrassate. Mr. Dixon 
may he able to compare it with an authentic specimen.” R.H.M. 
“I have examined Mr. Brinkman’s plants. The two gatherings are 
identical, I think, in characters, except that the leaves in the Rickeson 
plant are perhaps more uniformly squarrose than in the latter, and my 
remarks apply to both. I have compared them with G. Lisa De Not., 
but I should not refer them to that. That is to say, I should be 
quite willing to group G. Lisa and G. subsquarrosa and the Pembroke 
plant as one species (or sub-species of trichophylla) ; but in so far as 
the Pembroke plant differs from our ordinary G. subsquarrosa, it 
does not come nearer to G. Lisa, except in the long hair-point (in 
which, by the way, G. Lisa varies much). In G. Lisa the margins 
are widely and strongly recurved, as compared with G. trichophylla 
or subsquarrosa, which is not the case with the plant under notice. 
The basal cells in G. Lisa are also somewhat different, the short 
opaque cells of lamina reaching nearly to the base so that the rect¬ 
angular pellucid cells only occupy a small space ; this is not a 
character of the Pembroke plant. I think that the Pembroke plant 
must be considered a form of subsquarrosa. The hasal cells vary 
somewhat in length—though I find them very rarely approaching 
the areolation of G. trichophylla —and also in incrassation, and are 
on the whole, I think, very fairly characteristic of subsquarrosa; 
and this is certainly (taking into account the nearness of relationship 
with G. trichophylla) not a character to base a specific difference 
upon. I should strongly incline to subordinate G. Stirtoni, G. 
subsquarrosa, G. Lisa, G. Scircloa De Not., and G. Muhlenbeckii to 
G. trichophylla, grouping the 2nd, 3rd, and 4th as constituting a 
single sub-species with vars.” H.N.D. 
Grimmia subsquarrosa Wils., var .edinensis Braithw., Callerfountain 
Hill, Mid Perth (88), Oct. /07, R.H.M. “I think these packets are 
all correctly named. But the question forces itself upon one, how 
does this plant differ from Grimmia Stirtoni Schp. ? ” II.N.D. 
