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Macf aricine. — Pitcher ed Plants. 
EXPLANATION OF FIGURES IN PLATE XVII. 
Illustrating Dr. J. M. Macfarlane’s paper on Pitchered Insectivorous Plants. 
Fig. i. Seedling Nepenthes leaf, a, petiolar sheath, b , basal laminar lobes. 
c, upper laminar lobes. 
Fig. 2. Seedling Nepenthes leaf, older than last, d, lid. 
Fig. 3. Semi-diagrammatic representation of Fig. 2 for comparison with Figs. 
4, 5, and 6. 
Fig. 4. Seedling leaf of Heliamphora nutans. 
Fig. 5. Seedling leaf of Sarracenia rubra, ab, reduced petiolar sheath and 
basal laminar lobes. 
Fig. 6. Seedling leaf of Darlingtonia californica. 
Fig. 7. Diagrammatic view of leaf of Nepenthes Rajah, a , petiolar sheath. 
b , basal laminar lobes, ba, prolonged tendriliform midrib, c, upper laminar 
lobes attached to, and fused together at the top of the pitchered continuation of 
ba. d , fused pair of leaflets forming the pitcher-lid. e, median process growing 
out from the filiform midrib extremity, f, pair of similar processes representing 
reduced leaflets, g, apex of leaf midrib. 
Fig. 8. Leaf of Sarracenia Jlava which has failed to pitcher fully, ab , petiolar 
sheath and basal laminar lobes fused distally. c , midrib with dorsal wing resulting 
from organic union of two leaflets by their upper surfaces. At the curved apex 
a slight depression is present representing a rudimentary pitcher. 
Fig. 9. Development of Sarracenia Jlava leaf. 9 a, earlier stage showing 
sheath and ridge. 9 b, later stage with pitcher depression appearing above median 
ridge. x 5. 
Fig. 10. Upper part of Sarracenia Jlava lid, showing excurrent midrib, m.r.c. 
and fusion of lid leaflets beyond excurrent point. 
Fig. 11. Upper leaf part of Sarracenia psittacina. 
Fig. 12. Transverse section of Sarracenia Jlava leaf slightly above level of 
pitcher bottom. The fibro-vascular system alone is represented. p, pitcher 
cavity, x, double row of bundles of dorsal wing. xyl. t, fibres on inner side of 
xylem. xyl. v , vessels of xylem. phi , phloem, phi. t, fibres on outer side of 
phloem, x 30. 
Fig. 13. Transverse section of Iris germanica leaf. Lettering as in last, x 10 
