278 HJEPATIGÆ.
O b s .— This species in its normal state is only to he confused
with Plagiochila punctata, Tayl., which see.
The small flagelliferous forms, of which there many, are apt to
be mistaken for Plagiochila tridenticiilufa, Tayl., but this species is
at once separated from any of them by its erect habit, darker
coloured leaves, which also differ in shape and cell structure.
The American P. spinulosa of Sullivant and others has justly
been removed to another species, P. Sullivantii, Gottsche MS., see
Evans’ admirable monograph, “ North American Species of Plagiochila,”
Bot. Gaz., April 1890.
D escription of P j.atb CXVI.—P ig . 1. Plant n a tu ra l size.
2. Portion of stem x 24, antical view (Cader Idris, J. Balfs).
3, 4. Leaves x 24 (Cromaglown, Lindberg). 5. Portion of leaf
X 290 (ditto). 6. Bract x 24 (Cader Idris, J. Balfs). 7. Perianth
X 24 (ditto). 8, 9. Perigonial bracts x 24 (Cromaglown, Lindberg).
10. Antheridium x 24 (ditto).
5. P la g io c h ila p u n c ta t a , Tagl.
Plagiochila pmwlala, Tayl. Hep. Antarct. in Lond. Journ. of Bot. p. 371 (1844) ;
G.L.N. Syn. Hep. Suppl. p. 026 (1847).
Plagiochila spinulosa, var. punetata, Carr. Irish Crypt, p. 19, t. 2, f. 3 (1863).
Dioicous, densely cæspitose, flagelliferous, medium size, yellow
or olive-brown, young plants pale green in colour. Stems erect,
dark brown ; radiculose, rootlets whitish, branched, branches
arising from the axil of the upper leaves or bracts, lateral, but
slightly subpostical. Leaves patent to patent-divergent at an
angle of 55° (from 50° to 70°), alternate, obliquely inserted, lower
leave smaller, more distant, others subapproximate, only slightly
deourrent antioally, roundish-ovate or roundish-oval, upper margin
recurvate, spinose-ciliate, lower margin entire or almost so ;
texture firm, cells .small, roundish, lumen clear, walls thick,
angles thickened, trigones wanting, piunctate. Stipules wanting,
or rudimentary. Bracts larger than the leaves. Perianth from a
narrow base broadly obovate, compressed at the mouth, bilabiate,
truncate, mouth wide, spinose-ciliate.
D imensions.— Stems to 1 inch long, diam. '2 mm., with
leaves 1'75 mm. wide ; leaves, upper 1’4 mm. x '9 mm., 1 25 mm.
X ’9 mm., middle 1'2 mm. x '6 mm., IT mm. x '5 mm,, lower
•9 mm. X -75 mm., '8 mm. x '6 mm. ; cells ’02 mm. ('02 mm.
x -0175 mm., '0175 mm. x -0175 mm., '015 mm. x ’015 mm.,
•02 mm. x -02 ram., -025 mm. x -02 mm., -03 mm. x -015 nim.) ;
bracts 1-2 mm. high x P6 mm. broad; perianth P2 mm. high
x l-5 mm. broad; cilia at the mouth from -3 mm. to -6 mm.
long; pistillidia -22 mm. long x -05 mm. broad.
H ab.— Growing in woods and shady places, chiefly subalpine,
on rooks in dense compact tufts, or creeping amongst mosses,
when it is remarkably flagelliferous. Moderately rare.
1. Cam Galva; Cam Brea, Redruth, W. Curnow (as P. tn -
denticulata in Report and Trans. Penzance N. H. & A. Soo.
1881-2). 7. Barmouth; Dolgelly; Tyn-y-Groes, Merionethshire,
Dr. Carrington, G. A. Holt, W. 11 P. Snowdon District,
Carnarvonshire, O. E. Davies, E. AL Holmes. 10. Wensleydale,
Dr. F. A. Tees. 12, Borrowdale, Dr. Carrington fl W. H. P.
13. Glenlaggan Hill, Parton ; Burnfoot Hill, New Galloway,
J. McAndrew. 15. Bowling, A. McKinlag. IG. Moidart, West
Inverness, common and very Variable, on tree stems and rocky
banks, ascending to 2500 ft.. S. M. Alacvicar.
I. Abundant in Co. Kerry, especially in the Killarney Woods,
but not common in tlie northern or eastern counties ; Altedore
Glen, and at Seven Churches. Wicklow ; Glenad, Co. Leitnm,
Dr. D. Moore; Killarney and the South-west, most abundant.
Dr. Carrington.
Found on the Continent.
O b s .—Distinguished from Plagiochila spinulosa (Dicks.) by its
smaller size, more compact habit, darker colour, rounder leaves,
which are more transversely inserted, not decurrent, cells slightly
smaller, bracts broader proportionately, perianth sliorter with
longer cilia; it is also more flagelliferous. I do not rely much
upon the punctate character of the leaves, for there is little
difference to be observed in the cell structure of P. .spinulosa and
P. punctata.