Mj:
l i I 1. f
I:
hPP '^thin a short period
added to the genus Orthotrichum, none can be adduced
lookpTtf'boked, riia n rthfe subject of the present plate. Amtoo nbge tohvoesrewith
a single peristome, the only one to which it approaches in
general habit, is O. anomalum, at least that variety of O ano
is occasionally found on trees; from t lS , the'
teeth the longer and narrower tlieca, and more hairy calyptra
are alone sufficient marks of distinction. It comes far nSrer’
W v e r , to some with a double peristome, especially to O. Hut
chmsta; and O. crzspum, for the latter of which it has doubtbeen
hitherto mistaken. As O. Hutchinsia; never P)
occurs on trees, O.cnspum is the one most likely to be gather
sttoommee oofT Of t “ is very permanent, and easily seen iPe-niy
le naked eye, forming an arch over the mouth of the theca •
e leaves, too, are far more highly crisped. Thus, on the other
hand, tbe straighter leaves, the single peristome, the longer and
naiiower teeth, and almost closed orifice of O. Drummondii
are the best general characteristics of that species.
U. Drummondii is probably not unfrequent in Scotland and
Ithough a. the t i„ e ig„„,ant of the J „ u t e , epecihc d i" '’
tioiis I pointed It out to Dr H o o k e r as distinct from O cris
pum last year Ml Glen Fallach. The zealous Mr Drummond
having also discovered it, its characters were speedily deterined,
and his name bestowed upon it by D r H ooker and
myself, with that pleasure which the true naturalist ever feels in
acknowledging the merits of an active and intelligent disco-
Fig. I. O. Drummondii, nat. size. Fig. 2.
Fig. 4. Theca nearly mature, with the lid.
Calyptra. Fig. 7. Portion o f the peristome,
pairs o f teeth. Tig. 9- Sporules.
Fig. S. Lower leaf.
Fig. 5. Old theca. Fig. 6.
Fig. 8. Apex o f one o f the
i I'