Kentmere, G. Stabler. 13. Frequent, Kirkcudbrightshire, Dumfriesshire,
J. McAndrew. 15, 16. Uncommon, Moidart, West
Inverness, S. M. Macvicar.
I. Killarney, Dr. Carrington, D. McArdle. Kylemore, Co.
Galway, Dr. D. Moore. Cromaglown; Toro Waterfall, Prof.
Lindberg.
C. Jersey, ALrs. ALcKenzie.
Europe, North and South America, Java.
Obs.—The only species with which this can be confused are
Scapania aspera, M. & B., and Scapania purpurescens, which see.
The other two species with ciliate leaves [Scapania onithopodi-
oides. Dill., and Scapania nimbosa) are remarkably distinct.
D escription op P late LXXXVIII.—Fig. 1. Stems natural
size. 2. Stem x 11. 3. Antical lobe of leaf x 11. 4. Postical
lobe of leaf x 11. 5. Margin of leaf x 85. 6. Portion of leaf
x 290. 7. Bract x 11. 8. Perianth x 11. 9. Cross-section
of perianth x 11. 10. Portion of mouth of perianth x 85
(Dolgelly, W. H. P.). 11. Perigonial bract x 11. 12. Antheridium
X 64 (Sweden, Herb. Lindb.).
10. Scapania u n d u la ta (Z.), Dmu.
Jlepatica saxatilis undulata seminifera. Vaili. Bot. par., p. 98, t. 19, f. 6.
Liehenastrum p inm d is auriculatis majoe'ibus et non crenatis. Dill, Hist. Muse.
p. 190, tab. 71, fig. 17 (1741).
.hmgermania undidata, Linn. Sp. pi. 1598 (1753); Hook. Brit. Ju n g . t. 22
(1816).
Radula undidata, Dum. Comoe. Bot. p. 112 (1828).
Scapania undulata, Dum. Recueil, p. 14 (1835).
Martinellius undulata, Gr. à B. Nat. A rr. Brit. PI. p. 691 (1821).
Dioicous ; cæspitose, of a green, brown, or reddish-brown
colour. Stem variable in length, erect, simple or subdivided.
Leaves transversely inserted, approximate or imbrioate, divided to
about the middle into two unequal lobes, entire, denticulate, dentate
or ciliate-dentate, broader than long, undulate when dry ;
antioal lobe from half the size to subequal with the postical, convex,
subrotund, trapezoid or subreniform, rotundate, postical lobe
subrotund, trapezoid, rotundate, epidermis smooth ; cells smallish
5-6-sided, walls firm. Bracts with lobes subequal. Perianth
oblong-obovate, mouth entire or denticulate.
Male stems somewhat similar to the others ; andrcecia middle
or near the apex; perigonial bracts rather smaller and more
closely imbricate, lobes subequal ; antheridia several in each bract
roundish-oval, pedicel long.
Fruits April, May, June.
D imensions.— Stems 1 inch to 6 inches long, diam, A mm. to
•4 mm., with leaves 4- mm. wide; leaves, antical lobe lA mm.
X 1- mm., postical lobe 2' mm, x lA mm.; cells 02 mm.,
■025 mm. ; perianth 3' mm. x 1'25 mm.
H ab. On rocks or stones in or by streams or in wet places •
generally distributed throughout the British Isles ; most abundant
m subalpine localities, ascending to the top of our highest
mountains.
1, 3-5, 7-18, I.
Found on the Continent, Canaries, North America.
O bs.— This is the most common and variable type of British
Scapaniæ; it varies in height from i inch to 5 and 6 inches, and
assumes many forms, which varieties are described at length by
Nees in his “ Eur. Leber.” The notes under species likely to be
confounded with it will enable the student to distinguish it
D escription op P late LX X X IX .-F ig . 1. Plants natural
size. 2, 3. Portion of stems x 16 (Herb. Mongeot). 4 Perigonial
bract X 24 (Tyn-y-Groes). 5. Portion of leaf x 290
(Mougeot & Nest. Exsicc.). 6. Perianth x 16 (Baloombe,
G. Davies).
11. Scapania purpurasoens [H o o k .) , Tagl. MSS.
Jungermania nemorosa, var. purpm-ascens. Hook. Brit. Ju n g . t. 21, f. 16 (1816).
Dioicous, cæspitose, medium size, rosy to deep purple, rarely
greenish in colour. Stems erect or procumbent, rigid, dark brown
or purple, simple or with one or two branohes proceeding from
near the base ; radiculose, rootlets few, whitish. Leaves imbricate