254 
EASTERN ETHIOPIA 
XX 
or seed. Bulbils are modified buds, and appear as small 
tuberous bodies on the flowering branches, lodged in the 
Sisal plant. Cultivated for fibre in East Africa. 
The edges of some species are furnished with spines. 
axils below the flowers. They contain a reserve store 
of nutritive sulistances and remain on the flower stalk 
