408 Benedict: Revision of the genus Vittaria 



explanation of plates 15-20 



Unless otherwise noted, the reductions and magnifications are as follows: tracings 

 of whole plants and leaves reduced one-half; leaf and stem sections enlarged twelve 

 times; scales enlarged about thirt3 r -five times. The sections and scales were drawn 

 by means of a camera lucida. 



Plate 15. Vittaria Gardneriana Fee 



Fig. 1. Whole plant, showing general habit and soriation. 



Fig. 2. Cross-section through leaf in fertile part. 



Fig. 3. Cross-section through petiole, showing 2-angled character. 



Fig. 4. Single broad leaf from another plant, showing venation. 



Fig. 5. Cross-section same leaf, showing similarity to V. remota Fee. 



Fig. 6. Cross-section of petiole of same leaf. 



Fig. 7. Cross-section of another leaf through fertile portion. 



Fig. 8. Cross-section of petiole of same leaf. 



Fig. 9. Typical scale. 



Specimens figured: figures 1-6, H. H. Smith 1112, Santa Marta, Colombia 

 (this number includes also V. Moritziana Mett. — see plate V, and V. stipitata Kunze — 

 see plate IV, fig. 20); 7-9, Gardner, Organ Mts., Brazil 1837, probably part of type 

 collection. 



Plate 16. Vittaria remota Fee 



Fig. 1. Whole plant, showing general habit, venation, and soriation. 



Fig. 2. Cross-section through fertile part of leaf. 



Fig. 3. Cross-section of leaf just below fertile part. 



Fig. 4. Cross-section of leaf still lower down than preceding. 



Fig. 5. Cross-section through petiole more than 2 mm. above stem, to show 

 angled character. 



Fig. 6. Cross-section through petiole just after it leaves the stem. The angles 

 are not developed at this point, but the single leaf-trace has already given off the 

 lateral veinlets. 



Fig. 7. Cross-section through stem, showing origin of petiole — at left — and 

 a still younger leaf-trace — at right. A root is shown just leaving the stem at the 

 lower side. 



Fig. 8. Cross-section of a broader leaf through the fertile part, showing that 

 •-he sporangia are borne in a slight depression. 



Figs. 9-12. Cross-sections of same leaf, comparable to those in figs. 4-6, but 

 each respectively lower than the corresponding one in the first series. 



Figs. 13-15. Tracings from leaves showing abnormal modifications in the 

 venation. 



Specimens figured: figure 1, P. Wilson 81, Porto Rico; 2-7, L. M. Undenvood, 

 Jamaica, 1903; 8-12, R. S. Williams 889, Panama; 13-15, from a plant grown at 

 the N. Y. Botanical Garden, probably self-sown from Jamaica spores. 



Plate 17. Vittaria latifolia Benedict 



Fig. 1. Whole plant, showing general habit, venation, and soriation. 

 Fig. 2. Cross-section of leaf through fertile part, showing very slight depression 

 in which sporangia are borne. 



Fig. 3. Cross-section of leaf below fertile part. 



