Hill . — On the Seedling-Slructure of certain Piper ales. 175 
Nothing has been said regarding the bearing of the geophilous habit 
exhibited by certain species of Peperomia ; we shall be in a better position 
to discuss this when A. W. Hill 3 has published a detailed account of the 
highly interesting plants discovered by him in the Andes. 
To conclude, it may be stated that this work was commenced in the 
Jodrell Laboratory, Kew. 
I desire to express my thanks to Dr. Scott for placing at my disposal 
material in his possession, and also to Mr. Hales, Curator of the Old Physic 
Garden, Chelsea, who not only obtained seeds for me, but also undertook 
their germination. 
1 Hill, A. W. Note on some peculiar features in seedlings of Peperomia. Proc. Phil. Soc. 
Cambridge, Vol. xiii, Pt. i. 
EXPLANATION OF PLATE X. 
Illustrating Mr. T. G. Hill’s paper on the Piperales. 
Abbreviations : c.ph cotyledonary phloem ; cx., cotyledonary xylem ; end., endodermis ; 
ph ., phloem ; px., protoxylem ; x., xylem ; T. S., transverse section. 
Fig. 1. Piper cornifolium T. S. of cotyledonary bundle at the top of the petiole. 
Fig. 2. ,, „ 
The same bundle at a lower level. 
Fig. 3* » » 
The same immediately before entry into the axis. 
Fi g- 4- „ » 
T. S. hypocotyl before the fusion of the phloem masses. 
Fig* 5- >> 
The same after fusion of the phloem groups. 
Fig. 6. „ „ 
T. S. root. 
Fig. 7. Peperomia eburnea. 
T. S. of one cotyledonary bundle, showing slight bifurcation of 
the phloem. 
Fig. 8. ., „ 
T. S. of the other cotyledonary bundle, at the same level as in 
Fig. 7. 
Fig* 9* y> r> 
Same bundle as in Fig. 8, but at a lower level. 
Fig. 10. Pep. tithymaloides. 
T. S. cotyledonary bundle. 
Fig- 11. „ „ 
T. S. hypocotyl. 
Fig. 12. „ „ 
T. S. root. 
Fig. 13. ,, pellucida. 
T. S. cotyledonary bundle. 
Fig. M- ,t a 
T. S. hypocotyl. 
Fig. 15. Honttuynia cordata. 
T. S. cotyledonary bundle. 
Fig. 16. ,, „ 
T. S. hypocotyl, showing entry of cotyledon-traces. 
Fig. 17. „ „ 
T. S. root. 
