Only two of my books define bracteole, as a synonym of bractlet, which is the term all the other books use. Bractlet is defined as 'a very small bract', 'diminutive of bract', 'bract of a pedicel', 'bract born on a secondary axis, as on the pedicel or even on a petiole' None of these is specific to bulbous plants, though. I skimmed through descriptions of some alliums from the Pacific Northwest and saw bracts mentioned in only three species of the thirty described. No bracteoles or bractlets. Diane Whitehead