THE LEAF-TRACE IN SOME PINNATE LEAA r ES. 
35 
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DESCRIPTION OF PLATE. 
All the figures are from untouched photographs by Mr R. M. Adam. 
Fig. 1. Leaf of Polypodium brasiliense, Poir., from the rain-forest below Vista Chineza, near Rio de 
Janeiro. 
Fig. 2. Leaf of Polypodium fraxinifolium, Jacq., from the rain-forest at Alto da Serra, above Santos. 
Fig. 3. Leaf of Polypodium brasiliense, Poir., from cleft of dripping rock in the gorge near the sea at 
Praia de Leblond, south of Rio de Janeiro. 
Fig. 4. Leaf of Polypodium brasiliense, Poir., from the loose sand on Gavea Beach, south of Rio de 
Janeiro. 
Fig. 5. Transverse section of the rachis of a leaf from the plant of Polijpodium brasiliense, Poir., a leaf 
of which is represented in fig. 1. 
Fig. 6. Transverse section of the rachis of a leaf of the plant of Polypodium fraxinifolium, Jacq., 
another leaf of which is shown in fig. 2. 
Fig. 7. Transverse section of the rachis of a leaf of the plant of Polypodium brasiliense, Poir., a leaf 
of which is shown in fig. 3. 
Fig. 8. Transverse section of the rachis of a leaf of the plant of Polypodium brasiliense, Poir., another 
leaf of which is represented in fig. 4. 
The transverse sections shown in figs. 5, 6, 7, 8 were cut at the same relative levels in the different 
leaves. A stage in the formation of the pinna-trace is shown in every section. All x about 30. 
