186 S E P A T IC Æ .
19. Cephalozia leu ca n th a , Spnice.
Cephalozia leucantha, Spruoe, On Cephalozia, p. 68 (1882).
Dioicous, almost always cladocarpous, sometimes acrocarpous,
cæspitose, eflagelliferous, albescent, small, size of Ceph. dioaricala
(Sm.). Stems prostrate, with J and ¥ often intricately entangled,
slender, fragile, elongate, flexuose, simple or subramose, radiculose.
Leaves small, distant, patulous or assurgent, oblong or quadrate-
rotund, bifid to about the middle or more, sinus acute or obtuse,
segments often unequal, broadly subulate (3-4 cells broad at the
base), acute or subaouminate, parallel or connivent ; cells very
small, subquadrate, lower ones slightly elongate, walls firm, no
trigones or thickened angles. Stipules wanting. Bracts 3 or 4
times larger than the lower leaves, more oiTess connate, orhiculate,
subdenticulate, 2-S-lobed, segments short, acuminulate. Perianth
large for the size of the plant, 10 times longer than the lower
leaves, ovate-lanceolate-fusiform or sublinear, white, leptodermous,
above 3- (rarely 4-) angled, composed of a single layer of vei’y
small cells, about 100 round near the middle, mouth minute, often
obsoletely setulose. Calyptra delicate. Capsule large, often equal
to half the size of the perianth, oblong-cylindrical, hadious.
Andrcecia short, rarely occupying the whole of the branch,
terminal or medial, julaceous; perigonial bracts closely imbricate,
orbiculate, very concave, carinate, to a third or more bi-trilobed,
monandrous ; bracteole minute, linear-subulate ; antheridia small,
oval.F
ruits Spring and Autumn.
Dimensions.— Stems 3- to inch long, '075 min. to T mm. in
diameter, with leaves '2 mm. wide; leaves '2 mm. x '13 mm.,
T2 5 mm. x T5 mm., segments '075 mm., ’06 mm., T75 mm. x
T75 mm., seg. '075 mm., T5 m m .x T 7 5 mm., seg. '075 mm.,
•2 mm. x '25 mm., seg. T5 mm,, T25 mm., '225 mm. x '2 mm,,
seg. '125 mm., '075 mm.; upper leaves '275 mm. x 25 mm., seg.
•125 mm., -175 mm.; cells '0167 mm., 'OIS mm. x -0175 mm.,
•02 mm. X '02 mm., '015 mm. x -015 mm., '0225 mm. x -02 mm. ;
sub-bracts '3 mm. x '25 mm., seg. '15 mm., ’4 mm. x '4 mm., seg.
C E P S A I O Z I E I I A . 187
j n ! 1
•2 mm. ; bracts -75 mm., '4 mm. x '4 mm., seg. -15 mm,, -35 mm.
x -3 mrn., seg. -15 mm. ; bracteole '45 mm. x -25 mm.; perianth
2’ mm. X'5 mni., 1-25 mra. x '85 mm.; pistillidia '075 mm.x
•025 mm. ; valve of capsule '5 mm. x -175 mni.; perigonial bracts
•25 nini., '2 mm. x 2 111111., seg. -125 mm. ; antheridia '075 mni. x
•06 mm.
H ab.— On rotting wood, in very fine fruit. 15. Portach,
near Banchory, Aberdeenshire, along with Ceph. catenulata
(Hüben.) and Cejjh. curvifolia (Dicks.), J. Sim. Extremely rare.
Pound, on the Continent.
Obs.—Ceph. catenulata (Hüben.) is very different in its larger
size and fulvous colour to C. leucantha, leaves subinibricate,
broader and more concave, when dry incurved and catenulate,
cells larger, but chiefly by the deeply triplicate perianth, with
mouth distinctly ciliolate. C. leucantha is also certainly very
distinct from Ceph. lunulæfolia, Dum., which has larger, rhomboid-
rotund deourrent leaves, divided only to a third, sinus more or less
lunate, cells larger; periantb (in comparison with the leaves) much
shorter and like the calyptra fleshy (composed of several layers of
cells), &c. &c. “ E. S.”
D eschip'I'ion oe P late LXXII.—Pig. 1, Plants natural size.
2. Portion of sterile stem x 64. 3-7. Leaves x 85. 8, 9.
Upper stem leaves x 85. 10. Portion of leaf x 290. 11-13.
Sub-braots x 85. 14, 15. Bracts x 85. 16. Bracteole (?) x
85. 17. Pistillidium x 85. 18. Perianth x 31. 19. Crosssection
of perianth X 31. 20,21. Perigonial bracts x 85. 22.
Antheridium x 85 (Portach, J. Sim).
20. Cephalozia d en ta ta {Raddi), Lindb.
Jungermania dentata, Raddi in Mem. della Soc. Ita l. di Modena, xix. p. 32, tab. 4,
Fig. 4 (1818).
Anthelia dentata, Dum. Hep. Eur. p. 99 (1874).
Cephalozia dentata (Raddi), Lindb. in Jo u rn . Linn. Soc. xiii. (1872); Spruce,
On Cephalozia, p. 71 (1882).
Monoicous, densely depresso-cæspitose, eflagelliferous, minute,
pale green when young, when older dark green to brown in colour.