petaloideous

from The Century Dictionary.

• Same as petaloid; especially, noting those monocotyledonous plants which have flowers with parts corresponding to petals and sepals, such as lilies, orchids, etc., as distinguished on the one hand from those in which the flowers are arranged on a spadix (spadiceous), and on the other from those in which the protecting organs of the flowers are bracts (glumaceous). Compare spadiceous and glumaceous.

from the GNU version of the Collaborative International Dictionary of English.

• adjective (Bot.) Having the whole or part of the perianth petaline.
• adjective that division of endogenous plants in which the perianth is wholly or partly petaline, embracing the Liliaceæ, Orchidaceæ, Amaryllideæ, etc.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective botany Having some or all of the perianth petaline.