284 DR J. M. MACFARLANE ON THE 



DESCRIPTION OF PLATES I.-VIIL, 

 Illustrating Dr J. M. Macfarlane's Paper on " Plant Hybrids." 



Plate I. 



Fig. 1. Transverse section, root of Philesia buxifolia, x 50°. e., epidermis ; ex., external cortex ; i.e., internal 



cortex ; b.s., bundle sheath. 

 Fig. 2. Transverse section, root of Philageria Veitcliii, x 50°. Letters as above. 

 Fig. 3. Transverse section, root of Lapageria rosea, x 50°. Letters as above. 

 Fig. 4. Transverse section, external root-region of Pfiilesia buxifolia, x 450°. 

 Fig. 5. Transverse section, external root-region of Philageria Veitcliii, x 450°. 

 Fig. 6. Transverse section, external root-region of Lapageria rosea, x 450°. 

 Fig. 7. Transverse section, central root-region of Philesia buxifolia, x 450.° i.e., cells of the inner cortex; 



b.s., indurated cells of the bundle sheath ; ph., phloem patch ; v.a., pitted vessel of the xylem. 

 Fig. 8. Transverse section, central root-region of Philageria Veitcliii, x 450°. Letters as above. 

 Fig. 9. Transverse section, central root-region of Lapageria rosea, x 450°. Letters as above. 

 Figs. 10a, 106, 10c. Highly magnified views of bundle-sheath cells from Philesia, Philageria, and Lapageria 



respectively. 



Plate II, 



Fig. 1. Transverse section, stem of Philesia buxifolia, x 50°. e.-, epidermis; co., cortex; s., sclerenchyma sheath. 



Fig. 2. Transverse section, stem of Philageria Veitcliii, x 50°. Letters as above. 



Fig. 3. Transverse section, stem of Lapageria rosea, x 50°. Letters as above. 



Fig. 4. Transverse section, external stem-region of Philesia buxifolia, x 450°. ca., cuticle of the epidermis. 



Fig. 5. Transverse section, external stem-region of Philageria Veitcliii, x 450°. 



Fig. 6. Transverse section, external stem-region of Lapageria rosea, x 450°. 



Fig. 7. Transverse section, bundle and matrix parenchyma of Philesia buxifolia, x 550°. ph., sieve tubes of 



phloem ; 75a:., protoxylem. 



Fig. 8. Transverse section, bundle and matrix parenchyma of Philageria Veitcliii, x 550°. Letters as above. 



Fig. 9. Transverse section, bundle and matrix parenchyma of Lapageria rosea, x 550°. 



Plate III. 



Figs. 1, 2, 3. Illustrations of skeleton leaves of Philesia, Philageria, and Lapageria ; nat. size. 



Fig. 4. Upper leaf epidermis of Philesia buxifolia, x 150°. The cells here shown are less thickened in 



their walls and slightly more sinuous than in the mature tissues ; but difficulty of photographing 



successfully mature epidermal tissue compelled the use of this. 

 Fig. 5. Upper leaf epidermis of Philageria Veitcliii, x 150°. Though closely resembling fig. 4, the average 



condition approaches more towards fig. 6. 

 Fig. 6. Upper leaf epidermis of Lapageria rosea, x 150°. 

 Fig. 7. Lower leaf epidermis of Philesia buxifolia, x 150°. 

 Fig. 8. Lower leaf epidermis of Philageria Veitcliii, x 150°. 

 Fig. 9. Lower leaf epidermis of Lapageria rosea, x 150°. 



Fig. 10. Longitudinal median section through base of outer perianth segment (sepal) of Philesia buxifolia, x 25°. 

 Fig. 11. Longitudinal median section through base of outer perianth segment of Philageria Veitchii, x 25°. 



gl., gland tissue. 

 Fig. 12. Longitudinal median section through base of outer perianth segment of Lapageria rosea, x 25°. 



gl., gland tissue. 





