470 
FILICES. 
Davallia 
5. D. repens, Desv.; Hook, and Baker , Syn. Fil. 93. Rootstock 
woody, wide-creeping above ground, in* thick, thinly clothed with 
small brown lanceolate scales. Stipe under an inch long. Frond linear, 
a foot long, 1-1^ in. broad, simply pinnate, membranous, glabrous, 
pale green. Pinnae sessile, half ovate, cut away in a straight line on 
the inner and lower borders, rounded and toothed on the upper. Veins 
fine, radiating from the lower border, all free. Sori globose, sub- 
marginal, placed in a row in the teeth of the upper edge. Involucre 
broader than long, membranous, free at the sides. D. Boryana, Fred; 
Bojer , Fort . Maur. 408. D. hemiptera, Bory. Lindsaya repens, 
Kunze; Kuhn , Fil. Afr. 68. 
Mauritius, in the forests of Grand Bassin and Trou aux Cerfs. Also Bourbon, 
Tropical Asia, and Polynesia, not Continental Africa. 
6. D. Hornei, Baker. Rootstock subterranean, short-creeping. 
Stipes contiguous, 2-3 in. long, pale-brown or straw-coloured, naked, 
broadly grooved down the face. Frond deltoid or rhomboid, bipinnate, 
3-4 in. long, Lindsaya-like in texture, subcoriaceous, glabrous, pale 
green, the main rachis furnished with one or two linear erecto-patent 
forks from the lower half on each side. Segments sessile, obversely 
deltoid, i in. broad, with an upcurved lower and truncate inner 
border, the upper border erecto-patent as regards the rachis and 
toothed. Veins close, fine, free, flabellato-dichotomous. Sori globose, 
placed at the tip of the teeth of the upper edge. Involucre broader 
than long, membranous, free at the sides. 
Seychelles, common between rocks in the bed of streams, Horne , 677 ! 
Endemic. 
7. CYSTOPTERIS, Bernh. 
Capsules stalked, splitting transversely, with an incomplete vertical 
ring. Sori globose, placed on the back of the veins. Involucre del- 
toid, membranous, free at the sides, inserted by its base under the 
sorus and at first folded over it. — Small membranous decompound 
ferns, with free veins. Distrib. Everywhere in temperate and sub- 
temperate regions. Species 5. 
1. C. fragilis, Bernh. ; Hook, and Faker > Syn.Jil. 103. Rootstock 
suberect ; scales lanceolate, red-brown, membranous. Stipe straw- 
coloured, 2-4 in. long, slightly scaly. Frond oblong-lanceolate, mem- 
branous, glabrous, tripinnatifid, 4-12 in. long, 2-3 in. broad. Pinnae 
and pinnules lanceolate, cut away on the lower side at the base, 
the former with the rachis winged all through, the latter deeply 
pinnatifid with sharply-toothed segments. Veins fine, erecto-patent. 
Sori many to a full-sized pinnule, medial on the veins. 
Gathered in Mauritius by Thouars, according to Kuhn, but not seen by recent 
collectors. We have it from Bourbon, from Lady Barkly. Everywhere in the 
temperate zone. 
