1900 SUPPLEMENT—RECENT INTRODUCTIONS, &c. 407 
Gymnogramme—continued. 
Fic. 423. GYMNOGRAMME LEPTOPHYLLA. 
the nucleus of that most interesting group the Gold and 
Silver Ferns, the under-side of the foliage of many of 
them being covered with farina of a colour varying from 
the purest white to shades of yellow of different degrees 
of intensity. Sometimes plants are found which bear 
fronds suffused with white and yellow powder at the same 
Fie. 424. Back OF FROND OF GYMNOGRAMME ALISMA&FOLIA. ° 
Gymnogramme—continued. 
time: this sort of dimorphism in colours may frequently 
be observed in forms derived from the calomelanos type, 
which also sometimes produce fronds provided with the 
nsual covering on one half, whereas the other portion 
is completely destitute of the coloured powder. Such 
instances, however, can only be regarded as curiosities. The 
same remark is also applicable to the varieties with forked 
Fic. 425. GYMNOGRAMME ANDERSONIT. 
or crested fronds, which under cultivation Gymnogrammes 
have a peculiar tendency to produce: of these G. calo- 
melanos chrysophylla Parsonsii and G. pulchella Wetten- 
halliana are excellent examples. Then there are also a 
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Fic. 426. FROND OF GYMNOGRAMME CH®ROPHYLLA. 
few kinds, such. as G. rufa, G. tomentosa, G. vestita, &c., 
which are totally devoid of any powder whatever, and in 
which that principal ornament is replaced by a covering 
of reddish or silvery hairs, giving the plants a downy 
appearance that is very attractive. 
