Your pictures of the African Blood Lily intrigued me. There is this
  picture of a "tumbleweed" Allium that i saw on the Internet.  How do i
  tell the difference between the two? Both are bulb plants. Please help as
  I think my late father's neglected plant is regrowing after nearly 8
  years' lying dormant  and I don't want to lose it this time Thanks.
Fiona

The tumbleweed allium is an Allium schubertii. It's usually larger than the Blood Lily , has 2 tiers of flowers and is pink. The blood lily is deep red and more spherical.
Ornamental Onion (Allium schubertii)
A. schubrttii, planted in the ground, occasionally comes back for me depending on how cold the winter was. My Blood lily (Scadoxus multiflorus) is grown in a pot overwintered dry in the basement.
African Blood Lily (Scadoxus multiflorus)