ASPLENIUM. 
47 
of branching there is a space without pinnse, which is not the case 
in cetiticeps. Mr. Travers Smith sent me fronds in 1865, and 
from them I raised a large number of seedlings, which, in 1868, 
received a First Class Certificate on July 16th from the Royal 
Horticultural Society. 
9. incisum, Clapham. Found in 1859, between Whitby and 
Scarborough. Dwarf. Pinnae triangular, and the segments deeply 
incised. 
10. lineare, O' Kelly. Found near Ballyvaughan by Mr. O’Kelly. 
12X3 inches. A very fine form with almost linear segments. 
11. microdon, Moore. Found in 1872 near Ashburton, in North 
Devon, by Miss Bickford and Mr. James Richards. An undoubted 
hybrid between the present species and A. marinum. It is sterile. 
Larger in size though not unlike the hybrid (microdon) of Asple- 
nium lanceolatum and A. marinum. Length, 6 to 10 inches, 
width at the base, 4 inches.t 
12. obtusatum, Moore. Found in Devon, Kent, Yorkshire, Stir- 
ling, Argyle, Guernsey, and in Ireland. The pinnae are short and 
the pinnules roundish. Length, varying from 2 to 8 inches. 
13. ramosum, Lowe. Found near Plymouth by the late Rev. C. 
Padley. Branching several times an inch below the apex, other- 
wise it is like obtusatum. Length, 6 inches. 
14. serpentini, Statisjield. An interesting dwarf form. 
15. variegatum, Wollaston. Found both in Yorkshire and in 
Guernsey. Normal in all respects except being striped with white. 
THE SMOOTH ROCK SPLEENWORT. 
ASPLENIUM FONTANUM. — Bernhardt. 
A VERY rare, dwarf fern, growing on 
rocks and walls. The usual length 
of frond, four or five inches. It is 
rather tender, and requires cultivat- 
ing in a greenhouse, where it grows 
readily in porous soil, turfy peat with 
abundance of gritty silver-sand, and 
a little friable loam. In habit it is 
erect and tufted, bipinnate and nar- 
row, the frond narrowing from the 
centre both towards the base and 
apex. Colour dark green. The mar- 
gins of the pinnules spinosely dentate. Found near Petersfield, 
Hampshire, by the Rev. W. H. Hawker ; in Swanage Cave, Isle 
of Purbeck, by Dr. Power; near Tooting, by Mr. Gibbs ; between 
Tan-y-Bwlch and Tremadoc (Sir W. Hooker) ; and there are 
several other recorded habitats in Westmoreland, Derbyshire, 
Yorkshire, Northumberland, Kincardineshire, and Belfast, but 
these seem to refer to a variety of Cystopteris fragilis. 
Fig. 18. — Asplenium fontanum. 
Portion of mature frond, under side. 
f See Addenda for another hybrid. 
