GENERA OF THE OLAOACEJE. 139 



ealycle in eacli flower, which places them in a distinct tribe of 

 the family. 



Prof. Baillon also places these genera in Santalacece, which, 

 according to him, together with Olacacece, belong to a mere 

 section of the Loranthacece* : the validity of this view need not 

 be here discussed, as his definitions are not consonant with the 

 facts, 



DESCRIPTION OF THE PLATES. 



Plate V. 



Fig. 1. Portion of a plant of Myoschilos ohlovga : natural size. 



2. The ealycle : natural size. 



3. The same, with the 2 free sepals seated within it, which embrace the 



base of the corolla ; 



4. The corolla, seen from above : both natural size. 



5. The ealycle : magnified. 



6. The 2 free sepals: also enlarged. 



7. The corolla, seen sideways ; 



8. The same, showing the basal portion of its tube agglutinated to the 



ovary, its free portion being cut open to expose the 5 segments, 

 leaving one of the stamens in situ ; 



9. The five stamens, seated on the margin of the disk, all opposite to the 



segments: all magnified. 



10. One of the segments of the corolla, seen dorsally, to show the short 



mucroniform spur below the apex : magnified ~ 



11. A longitudinal section of the ovary, style, and stigma, showing its 

 solitary cell, from the bottom of which arises the free filamentous 

 placenta, from the apex of which 3 small ovules are suspended : mag- 

 n ified. 



12. The fruit, supported by the persistent ealycle and sepals : natural size. 



13. The same, with half of the pericarp removed to show the enclosed nut. 



14. The solitary albuminous seed removed, haying no integument, showing 



the persistent filiform placenta pushed on one side : natural size. 



15. The same : magnified. 



16. The persistent placenta, with the 2 abortive ovules : magnified. 



17. A longitudinal section of the albuminous seed, with the enclosed 



embryo: magnified. 



18. The embryo separated, with its superior radicle and 2 short cotyledons : 



mam ified. 



Plate VI. 



Fig. 1. Drawing of a plant of Arjona rigida ; 



2. The ealycle, with its cupular base shown from the inside ; 



3. A flower, supported by its 2 sepals : all natural sizr. 



4. The ealycle ; magnified. 



* Adansonia, iii. pp. 114, 115. 



