Petaloideous \Pet`al*oid"e*ous\, a. (Bot.)
Having the whole or part of the perianth petaline.
[1913 Webster]
{Petaloideous division}, that division of endogenous plants
in which the perianth is wholly or partly petaline,
embracing the {Liliace[ae]}, {Orchidace[ae]},
{Amaryllide[ae]}, etc.
[1913 Webster]