174 
European Ferns . 
clusters of spores appearing at first like lines upon the under portion, but afterwards opening 
and covering the whole of it. There are also other and shorter fronds, of a more membranous 
texture, and less divided, which produce little or no fruit ; the principal fronds are cut into 
very slender segments. 
This fern, which is sometimes called the Annual Maidenhair, grows readily under a bell- 
glass in a mixture of light loam and sand, scattering its spores freely, and becoming almost 
a weed under favourable circumstances. It is a pretty little species, and well worth cultivating. 
GYMNOGRAMMA POZOI, Kunze. 
This is a very rare little fern, found only in the fissures of shady rocks in the mountain 
regions of Cantabria, where it was collected by a Spanish botanist named Pozo (from whom 
it takes its name), and in two localities in Granada, at an elevation of three thousand feet. 
Although described as a distinct species, most authors are agreed in regarding it as an out- 
lying form of G. rutcefolia , Hook., a common Australian species, occurring also in Chili and 
New Zealand. It is a small plant, with tufted pinnate fronds from three to six inches in 
length, the pinna; being covered below with brown scaly hairs, which are also scattered over 
the upper surface. The sori are in linear rows in the centre of the under-side of each 
pinna, sometimes spreading over almost its whole surface. In the Spanish plant the fronds 
are of a thinner texture and greener hue than in the type. It has been placed by some 
authors in the genus Ceterach , in which it is placed in our introductory list (p. xvi.). 
(1) FROND OF GYMNOGRAMMA LEPTOPH YLI.A. 
(2) UNDER-SIDE OF PINNA. 
