Allium sieheanum - cluster head form

In this drawing of Allium sieheanum, it is interesting to see
evidence of the bulb growth cycle.  By the time the flowering
stem appears, the original bulb is all but gone, and a fresh
new offset bulb has replaced it.  The foliage has withered
away with only the basal leaf sheaths remaining, the new
foliage emerging just as the flowers reach full anthesis.
Also note the long, unequal, persistent spathe segments,
and the soil line indicated with a dashed line.