Tkibe IT- IV. Gen. VII— XII. 
also by the protruding thread like-receptacle. Fronds generally 
delicate and pellucid. 6 Species. 
Gen. VII. Loxsoma. Sorus marginal, situated in the angles 
of the notched pinnae ; involucre thick in texture as is the frond ; 
receptacle protruded ; capsules crowded upon it and mixed with 
jointed hairs. 1 Species. 
Tribe IV. — Polypodies. 
Sub-Tribe A. 
Gen. VIII. Adiantum. Sorus marginal, dotlike ; involucre 
membranous, kidneyshaped, formed of the edge of the frond tur- 
ned back and bearing the capsules on its under surface, its surface 
is veined, the veins being continuous with those of the pinnules. 
6 Species. 
Gen. IX. Hypolepis. Sorus dot-like, marginal, separate ; 
involucre springing at its point from a vein formed of a recurved 
lobe, but sometimes the margin is so slightly bent back that the 
sorus is really naked. In habit and general appearance this genus 1 
differs widely from the preceding one, which may always be * 
recognized by its marginal, kidney-shaped, involucres. 3 Species. 
Gen. X. Cheilanthes. Sorus marginal ; the capsules very * 
numerous and prominent, often covering the small pinnules : i 
involucre as in Hypolepis, except that, instead of isolated teeth oi 
lobes of the pinnules, larger portions of the margin are bent back 
over the sori, forming, in a greater or less degree, a continuous invol- 1 
ucre. The only New Zealand representative of this genus is much 1 
smaller and more insignificant than those of Hypolepis, as will be 11 
seen on reference to the species. 1 Species. 
Gen. XI. Pellea. Sorus line-like or oblong, marginal 
growing towards the end of the simple or forked veins, at length 
forming one mass, a continued, more or less broad, marginal line o: 11 
fructification ; involucre narrow, continuous, formed of the mem- 
branous edge of the frond at first turned back and at length fre- 
quently spread open so as to expose the entire fructification 
Both the New Zealand species are pinnate. This genus is incluf 
ded in Pteris by Dr. Hooker, but in a more recent work by Sii * ( 
William J. Hooker it has been separated on account of the differenc 
in the position of the capsules. 2 Species. 
Gen. XII. Pteris. Sorus line-like, marginal, continuous 
capsules inserted in the groove between the frond and the involucre, 
the latter marginal, continuous, having a dry shrivelled appearance ^ 
6 Species, which may be divided into : Sj 
10 
