Aspleniuin. | XCIV. FILICES. 563 
On rocks and walls, in mountain districts, in central and southern 
Europe, extending probably into western Asia, but scarcely northward of the 
Jura, except as an introduced plant. In Britain it has been found on walls 
in England, but only where planted. Lr. summer and autumn, 
3. 4. lanceolatum, Huds. (fig. 1292). Lanceolate Spleenwort.—A 
low, tufted Fern, with twice-pinnate fronds, lanceolate in their general 
outline like the last, but with much larger segments, Fronds usually 3 to 
6 inches high, rarely attaining a foot when luxuriant, the longest pinnas, 
rather below the middle of the frond, 1 to 13 inches long; the segments 
obovate or broadly oblong, narrowed at the base, but almost sessile, notched 
with a few pointed teeth. Sori 2 to 4 on each segment, oblong and dis- 
tinct when young, but when old united in an irregular mass, covering the 
upper part of the segment. 
On rocks and walls, in western Europe, chiefly near the sea, extending 
southward to Madeira, and northward to the English Channel. In Britain, 
it is found in Yorkshire, Wales, and the western and southern counties. 
and near Cork in Ireland. £7. summer and autumn. 
4, 4. marinum, Linn. (fig. 1293). Sea Spleenwort,—Fronds tufted, 
usually 6 inches to near a foot high, narrow-lanceolate in general outline, 
but coarser than in A. lanceolatum; the stems usually black, and only 
once pinnate. Segments obliquely lanceolate or nearly ovate, rather thick, 
obtuse, crenate, especially on the upper edge, narrowed at the base into 
a short stalk, the longer ones, in the middle of the frond, about an inch 
long. Sori several on each segment, linear, often above 2 lines long. 
On rocks and walls, near the sea, in western Europe, extending south- 
wards to the Canary Islands, and eastward to several spots along the 
Mediterranean, and to North America. In Britain it is common on the 
south and west coasts and north to the Shetlands, but no further south than 
Yorkshire on the east coast. Fr. the whole season. 
5. 4. Trichomanes, Linn. (fig. 1294). Common Spleenwort.—A 
neat little tufted Fern, usually 2 to 6 inches high, simply pinnate ; the 
slender stalk usually black; with numerous obovate, orbicular, or broadly 
- oblong segments, nearly equal in size, those of the middle of the frond 
rather the largest, 2 to 3 or rarely 4 lines long, more or less toothed. Sori 
several on each segment, oblong-linear and distinct when young, but often 
uniting in a circular mass when old. 
On walls and rocks, throughout Europe and central and Russian Asia. 
except the extreme north. Common in Britain. Fr. the whole season. 
6. A.. viride, Huds. (fig. 1295). Green Spleenwort.—Very near A. 
Trichomanes, and considered in the first edition of this Handbook as a 
variety of it, and now admitted as a species in compliance with general 
custom. It is usually less rigid, the segments rather shorter and broader 
especially on the upper side, and the stalk is either entirely green or brown 
at the base only. 
Among rocks in the mountains of central and northern Europe, Asia, 
and America. Not uncommon in most mountainous districts of Britain. 
Fr. the whole season. 
7, A. Adiantum-nigrum, Linn. (fig. 1296). Black Spleenwort.— 
Fronds tufted, usually 6 inches to a foot high, including the rather long, 
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