634 UNDERWOOD: THE GENUS GYMNOGRAMME 
Selliguea have little in common with the old world representatives 
of that genus. While no. 66 was the type of Syzammia Presl, it 
has been referred to Phymatodes by John Smith, and surely this 
treatment is quite satisfactory, as the plant differs from Phymatodes 
only in its slightly elongated sori. G. Mexicana, judging from 
Fée’s figures, will follow G. elongata. Gymnogramme hetero- 
phlebia Gilbert, Bull. Torrey Club, 26: 325. 1897, from Vene- 
zuela, is another species of Phymatodes described long ago from 
South America as Polypodium persicariacfolium Schrad., so that 
Selliguea based by Bory on S. Feei from Java is to be regarded as 
an exclusively old world genus. 
SUMMARY 
1. The genus Gymnogramme as treated at Kew, far from being 
a natural group of plants, contains among its species a number of 
generic groups, several of which bear no close phylogenetic rela- 
tions to the others or to each other ; some of these belong to dif- 
ferent tribes even. 
2. Certain of these genera are related to the Polypodieae, others 
to the Aspidicae, one possibly to the Vittarieae, but more are dis- 
tinctly related to the Asplenieae, possessing every asplenioid char- 
acter except the indusium. s 
3. The tribe Grammitideae as recognized in Synopsis Filicum 
has no good ground for recognition as a natural group of genre 
4. The members of Gymnogramme of the Synopsis Filicum 
have little relationship with the tribe Pterideae with which, for the 
most part, they are associated in Die natiirlichen Pflanzenf amilten. 
5. The name Gymnogramma being a typonym of the mono 
typic Gymnopteris established thirteen years earlier, disappears from 
botanical nomenclature. 
6. While the genera are largely represented in the American 
tropics, some belong exclusively to the old world, and ae 
have a wide distribution throughout tropical and warm tempera 
regions. 
7. The two species hitherto referred to Gymnogramme ee 
ring within the limits of the United States represent tw distin 
genera, Ceropteris and Bommeria. A third species (Ceropter’s © 
cosa) is added from southern California. 
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