and on various Plants related to them. 345 



interchange, as it were, of structure and representation of form, which lead 

 me to consider this as a Monocotyledonous form of the albuminiform homo- 

 geneous embryo, and as the analogue of Rafflesiaceas and Cytinece of Dicoty- 

 ledones. These speculations I have endeavoured to illustrate in that part of the 

 present memoir which is intended to show that the group Rhizanthece cannot 

 be concentrated so as to be placed after Monocotyledones, or indeed after any 

 of the primary divisions, but that it presents types appertaining to both Dico- 

 tyledoncs and Monocotyledones. 



EXPLANATION OF THE PLATES. 



Tab. XXXIV. 



Fig. 1. Male flower of Sapria Himalayana, just before expansion: — of the natural size. 



Fig. 2. Section of the same. 



Fig. 3. Anther, viewed laterally; 3 a, 3 a, vertically: — magnified. 



Fig. 4, 4. Longitudinal sections of the same. 



Fig. 5. Half of longitudinal section of the same, viewed somewhat obliquely. 



Fig. 6, 6. Transverse sections of anther. 



Fig; 7- Part of the Endothecium, highly magnified. 



Fig. 8. Pollen, seen with j'^j m. (after long maceration). 



Fig. 9. The same, fresh, seen with a simple lens of ^V focus. 



Fig. 10. A hair from the apex of the column: — highly magnified. 



Fig. 11. Mode of parasitism. 



Tab. XXXV. 



Fig. 1. Female flower of Sapria Himalayana: — of the natural size. 



Fig. 2. The same, longitudinally divided. , ; ; 



Fig. 3. Part of a placenta : — magnified. 



Fig. 4, 4. Two of the ovula : — highly magnified. 



'' Tab. XXXVI. 



Fig. 1. Plant of 77«o//ea ^/•«?j£?i^ora, reduced about 4^ times. 

 Fig. 2. Fruit of ditto, reduced in the same proportion. 

 Fig. 3. Flower, of the natural size. 



2 z 2 



