A Dictionary of Choice Ferns. 
227 
GYyiNOGRAMMK—contimced. 
profusely covered beneatli with a brilliant sulphur-yellow, 
farinose powder, of which there isi also an occasional 
sprinkling on the upper surface. The narrow, obliquely- 
forked sori become, when fully mature, confluent, and nearly 
cover the whole under-surface of the frond. It is more 
difficult than other Gymnogrammes to grow from one year 
to another. During the winter it must be kept as close to 
the light as possible. 
Q. tartarea. 
A very distinct and deservedly-popular, stove species, 
also known in gardens as G. dealbata, native of Tropical 
America. Its fronds are oblong-tri angular, 1ft. to 2ft. long, 
6in. to 12in. broiad, and boraie on firm stalks Gin. to 12in. 
long, of a dark chestnut-brown colour, and scaly towards 
the base. They are twice divided nearly (not quite, as 
appears to be the case in Fig. 95) to the midrib; of the 
numerous spear-shaped leaflets, the lowest are the largest, 
and all are divided into oblong, blunt leafits, entire or 
nearly so, of a heavy, dull gre»ein colour on their upper sur- 
face, but entirely covered beneath with snowy-white powder. 
The abundant niarrow spore masses are disposiedi along the 
midvein, eventually becoming confluent; and being of a 
very dark colour, as well as the stalks, form a striking 
contrast with the pure white under-side of the fronds. 
6r. t. ochracea differs essentially from the type in the bright 
yellow colour of the under-side of its fronds, which have 
leafits very regular, and only the lowest distinctly toothed. 
GYMNOPTERIS. See Acrostichum. 
HEMIDICTYUM. See Asplenium. 
HEMIONITIS. 
This genus is composed exclusively of small- 
growing Ferns with peculiar-shaped fronds — hence 
the popular name of Ivy-leaved Ferns. It forms a 
confined to the Tropics, and which are readily distin- 
guished through their spore masses being disposed 
in continuous rows along, and sometimes also 
developed between, the veins, in which division they 
are netted. Although some eight or nine species 
are known and described, only three or four of them 
are usually found in cultivation : these are easily- 
grown plants of dwarf habit, very useful for decora- 
tion and also for growing in Fern-cases, where they 
small group of stove 
which are practically 
Q 2 
