OF THE FORTY-NINTH PARALLEL OF LATITUDE. 49 
Some of the specimens from N.W. America are very large, 
with the leaves spreading and recurved, and the capsule erect 
and elongate, but there appears to be no real difference excepting 
the external appearance. 
Besides the P. contortum, Menzies, collected by himself in 
N.W. America, there are in Herb. Hooker. some specimens, not 
in a very good state, of what appears to be another species, more 
nearly allied to P. aloides. 
P. ATROVIRENS, sp. nov. Caule simplici elongato, foliis patentibus 
siccitate incurvis subcrispatis e basi latiore cauli appressa late lanceo- 
latis acutis marginibus, fere a basi ad apicem serratis nervo dorso 
dentato pagina superiore partis folii lanceolatis lamellis fere tota ob- 
tecta, theca in pedunculo unciali oblonga erecta, operculo convexo 
brevirostro. 
Hab. Sitka, Barclay. ` 
About three inches high, blackish brown. Foliage softer than 
in P. aloides, the base with larger cells, the margins serrate 
almost to the very base. 
P. contortum differs from this in its leaves being more nearly 
lanceolate throughout, not sheathing below, and the areolation at 
the base nearly the same as on the upper part, where they are 
more gradually narrowed into the point. 
POLYTRICHADELPHUS, C. Müller. 
P. LYALLII, sp. nov. Caule brevi breviter fastigiatim ramoso inferne 
subnudo superne, foliis e basi oblonga latiore erectiore amplexante 
lanceolatis patentibus sensim acutis lamellis obtectis marginibus e 
medio ad apicem serratis incurvis dorso convexis lzvibus aut in superi- 
oribus paucidentatis, perichztialibus internis basi longioribus con- 
volutis apicibus bevioribus, theca in pedunculo elongato flexuoso rubro 
suboblonga inferne ventricosa inclinata setate horizontali supra bi- 
plicata spatio intermedio concava infra irregulari convexa basi apo- 
physe plicata rugosa brevi sub ore contracto, operculo subuli-curvi- 
rostrato, calyptra pilis paucis brevibus appressis. 
Hab. In swampy places on the east side of the Cascade Mountains, 
British Columbia, at an elevation of 7000 feet, July 1860, Lyall. 
All the specimens agree in their short stems, rarely simple, 
with a single perichztium, but branched in a close fastigiate 
manner, so that at first sight the stems have the appearance of 
bearing a number of sete from nearly the same point; on ex- 
amination, however, each seta is found to be terminal on its own 
proper branch, and of these as many as nine haye been observed 
LINN. PROC.—BOTANY, VOL, YII, E 
Y2/7YT A NTÓA: 
AUUIANIGJ 
ae A "S am. endum a cm 
