259 — 
inhabiting a relatively restricted geographical area. The 
lines along which specialisation tends lead from a typical 
liliaceous flower, with the perianth segments all alike in 
shape and position and the stamens all perfect, through 
species having the inner segments partially connivent and 
the outer stamens partially aborted, — to those with the 
segments always connivent and the outer anthers com¬ 
pletely aborted. The conditions affecting the abortion of 
the anthers and the approximation of the inner segments 
are correlated, and without doubt they are associated 
with insect-visitation. 
Explanation of the figures in Piute "VIII. 
Fig. 1. Old bulb (7 years?) of Albuca corymbosa, reduced. 
Fig. 2. Vertical section of a younger bulb of the same species, 
nat. size. 
Fig. 3. Transverse section of a smaller bulb of the same species, 
nat. size. 
Fig. 4. Inflorescence of A. corymbosa , reduced. 
Fig. 5. A flower of the same, nat. size. 
Fig. 6. Ditto, with an outer segment bent downward. 
Fig. 7. Inner segment with inner stamen in situ, nat. size. 
Fig. 8. Pistil, nat. size. 
Fig. 9. Stigma, viewed from above. 
Fig. 10. Old bulb of A. fastigiata , nat. size. 
Fig. 11. A flower of the same species open in strong sunshine, 
reduced. 
Fig. 12. Vertical section of bulb of Hybrid a (A. fastigiata X 
A. corymbosa ), three years old, nat. size. 
Fig. 13. Transverse section of the same. 
Fig. 14. Vertical section of bulb of Hybrid (3 (Hybrid a X 
A. corymbosa ), 14 months old, nat. size. 
Fig. 15. Transverse section of the same. 
