10 
COPELAND. 
4. MAR ATT I A Swartz. 
Fronds large, at least bipinnate; pinnae attached by pulvini ; sori below 
tlie apices of the free veins, in a row parallel to each margin, the sporangia 
of each sorns fitsed together forming a synanginm. Christensen recog- 
nizes 28 species, in the tropics of both hemispheres and south to the Cape 
of Good Hope. Our species are too near together. 
Synangia usually of 8 or less pairs of sporangia. 
Main racliis smooth. 
Pinnules broadly lanceolate, acuminate 1. M. fraxinea 
Pinnules narrowly lanceolate, caudate 2. M. pellucidu 
Main racliis rough 3. AL sambucina 
Synangia usually of 10 or more pairs of sporangia. 
Coarsely serrate 4. M. silvatica 
Obscurely serrate, except at apex 5. M. ternatea 
1. Marattia fraxinea Smith. 
The original plant, from Bourbon, has bipinnate fronds, naked axes, 
almost sessile pinnules 5 to 8 cm long, serrate, lanceolate, acuminate; 
sori submarginal, sporangia about 6 on each side. 
Various modern writers have included under this name all the related forms, 
of Malaya, Asia, Africa, and tropical Australia. I mention here those regarded 
as distinct by Diels, Christ or Christensen. 
2. Marattia pellucida Presl. 
Similar to M. fraxinea , but the pinnules narrower and longer (ID cm 
long), decidedly caudate, pale beneath, the sori shorter (usually about 
1 mm long). The two species should probably be united; M. vestita 
Christ is probably identical with M. pellucida. 
Philippines; New Caledonia. 
3. Marattia sambucina Bl. 
Main racliis rough, rachises of pinnae winged; pinnules sessile, hardly 
6 cm long, oblong-lanceolate, sharply serrate with appressed teeth; vein- 
lets simple; sori two-fifths of the way from the margin to the costa; 
sporangia 8, more or less, on a side. 
Java, Celebes; Luzon, teste Christ. 
4. Marattia silvatica Blume. 
Described as differing from M. sambucina in being coarsely serrate 
and tripinnate. The Luzon plant referred here is very coarsely serrate, 
sometimes tripinnate but not normally so, has pinnules up to 9 cm long, 
usually stalked, and large synangia of 12 or more pairs of synangia. 
Java, New Guinea; Luzon. 
