When arils are bred with bearded irises, they form hybrids known as arilbreds. If median or dwarf bearded irises are involved, small arilbreds with the qualities of both aril and median types often result.
In 2018, the Aril Society International endorsed the use of the following terminology for the smaller arilbreds:
ARILBRED DWARF (ABD):
any arilbred with a registered height less than 33 cm (13 inches).
ARILBRED MEDIAN (ABM):
any arilbred of one-half aril complement or less, with a registered height between 33 and 56 cm (13 and 22 inches), inclusive.
Note that these designations are optional. They supplement but do not replace the official arilbred classes (OGB-, RB, etc.) Most arilbred medians are less than 1/2 aril by content, and are thus eligible for the William Mohr Medal
, rather than the C. G. White Medal
(ABD), 'Eye to Eye'
-- Main.RPries - 2009-10-07