; '‘l U
wanting here, yet its rarity with us is certain, or so conspicuous a plant
would before this have rewarded our numerous collectors. The strongly
undulated leaves, and serrate, bilamellate nerve at once distinguish it. I
hope to give the figure of it in the Supplement to the next volume.
D IC H O D O N T IU M P E L L U C ID U M .
Var. y. strictum Braithw.
Stems elongated, densely tufted, straight, slender, fastigiate. i t in. high.
Leaves distant, very short, at the middle suddenly narrowing with incurved
margins, and tapering upward into an obtuse scarcely denticulate point.
(T. X L V , F.)
H a b .— Among short grass, Blorenge mountain, near Abergavenny (Mitten
1883) !!
The short leaves and close straight stems give this moss an aspect widely
different from that of the type, with which however it quite agrees in cell
structure.
O N C O P H O R U S ( S e c t . R h a b d o w e i s s i a ).
9. ONCOPHORUS CRENULATUS {Mitt.) Braithw.
Autoicous ; iu ta lle r la x soft tufts. L e a v e s p a ten t, ligula te, obtuse,
c renu lato-se rrate in upper half, nerve vanishing at apex, upper cells
la x, subquadrate, Cap s. oval. (T. X L V , E.)
S y n .— Rhabdoweissia deiilicalata W i l s . in Kew Journ. Boi. ix, 293 (1857).
Didymodon crenulatus M i t t . Journ. Linn. .Soc. i, Suppl. 23 (185g).
A u to ico u s ; loosely cæspitose, more robust than One. crispatus,
,1— I in. high, dull green, dichotomous. L e a v e s la x p a tent, fla ccid,
ligu la te , obtuse or pointed, flattish, recurved a t apex, crenulato-serrate
from middle to apex, nerve vanishing below th e point, basal cells hyaline,
elongated, upper rounded-quadrate, sub-obscure w ith tlie primordial
u tricle. Pe r ich . b ra c ts similar. Cap s, on a sliort y e llow seta, rufous,
oval, sulca te when old, lid ros trate, teeth red, narrow, erect when dry.
H a b .— W e t rocks. Fr. 6— 7.
Lochgoil head and Ben Voirlich (Htint 1865) ! ! Beddgelert (Hnnt 1865) I ! Abergynalvyyn
(Rogers 187g) ! ! Pont Aberglaslyn (Mitten). Cwm Bychan and Tyn-y-Groes (i/o«
1883)! 1
This was confused with 0 . crispatus both in description and figure, the
leaves are much broader than in that species, and the upper cells half as
large again. Th e figures O. c. are drawn from 0 . crispatus.
T O R T U L A C E Æ .
3. ACAULON MEDITERRANEUM Limpr.
A u to ico u s ; resembling H. miiiicwiK, but more slender, inner perich.
b ract v ery large, convolute, entire. Cap s, minutely ap icu la te , spores
nearly smooth. (T . X I I ,* I.)
S y n .— Acaulon mediterraneum L im p r . in R a b e n h . krypt.-fl. von Deutschl. 4 Bani3, 180 (1886).
Autoicous ; pale yellowish green, in cæspitose pa tches ; plants
more slender and conical. L e a v e s short broad, entire, nerved to apex,
upper cells smaller, rhombic. Perich. b racts two, unequal, innermost
very large, oblong, convolute and enfolding the fruit, with a short flat
acute point, quite entire or with 2— 3 short irregular teeth, nerved to
apex ; outer | as long, obovate, a cute , the margins involute. Caps,
erect, reaching to middle o f inner bract, globose, leptodermous, ca s taneous,
minutely apiculate ; spores nearly smooth.
Hab.'— Top of a hedge-bank at Douglas, I. of Man. [Holt Oct. i 885) ! !
Although very close to A . minus, this little moss has a different aspect,
from the longer inner bract, completely wrapped round the fruit, and
narrowing upward, the plants also are somewhat glossy and curve to one
side and are taller than those of A . muticum.
M O L L IA M IC R O S T O M A .
Var. y. elata (Schimp.)
Elongated, densely tufted ; caps, minute, subglobose, not reaching tlie
tops of the innovations.
3 yn. Hymenostomum microstomum e. elatnm B r . S c h . Bry. eur. S c h im p . Synop-s. 2 ed. 34.
H a e .— W e t rocks. Janets cave, Malham (Holt 1885)! ! Settle (Burgess
1886)!!
Sterile tufts ij- in. high, apparently referable to this variety, though
it is difficult without fruit to distinguish from M. viridula var. densifolia.
T a b . X L V .
A Polytrichum gracile. B. Leucobryum minus (New Foresi, Piffard). C. Trematodon
ambiguus (Tummel Bridge, Braithmaite). D. Blindia trichodes (Bollon, Seholefield).
E. Oncophorus crenulatus (Loch God, Hunt). F. Dichodontium pellucidum yar. strictum
(Abergavenny, Miffen).
a. Fertile, c. sterile plant. i. leaf. laa. Areolation of apex. lab. Do. of base.
2. Perich. bracts. 3. male infl. 4. bract and antheridia. 5. capsule. 6. calyptra.
8. peristome. 10. annulus.