from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Resembling a petal.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Resembling the petal of a flower
from the GNU version of the Collaborative International Dictionary of English
- adj. Petaline.
from The Century Dictionary and Cyclopedia
- In botany, having the form of a petal; resembling petals in texture and color, as certain bracts.
- In zoology, resembling a leaf or petal; specifically, noting those heterogeneous ambulacra of some echinoderms, as of the Clypeastroida, of which the apical part is wide in the middle and tapers to a point at the margin, where it joins the oral portion. See cuts under ambulacrum, cake-urchin, and petalostichous.
- Having the general form of a leaf.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. resembling a flower petal
This species is apparently prone to developmental errors so that the labellum can be petaloid or (as in this case) all the petals develop the labellum (lip) characteristics.
Geophyte diversity is remarkably high; the lowland and montane fynbos ecoregions support about 1,500 species, most belonging to the petaloid monocot families, notably Iridaceae, Orchidaceae, Hyacinthaceae, and Amaryllidaceae.
Pollination of petaloid geophytes by monkey beetles (Scarabaenidae: Rutelinae: Hopliini) in southern Africa.
Most of the 630 species of geophytes are petaloid monocots in the families Hyacinthaceae (Lachenalia, Ornithogalum), Iridaceae (Babiana, Lapeirousia, Moraea, Romulea), Amaryllidaceae (Brunsvigia, Hessea, Strumaria) and Asphodelaceae (Bulbine, Trachyandra).
Other distinctive features in comparison with other Mediterranean-climate floras include the large number of geophytes or bulblike plants (1,552 spp.), especially among the petaloid monocots, and the relative paucity of annuals (6.8 percent of the flora) and trees (2.4 percent).
Geophyte diversity is particularly high; the lowland and montane ecoregion support about 1,500 species, most belonging to the petaloid monoct families, notably Iridaceae, Orchidaceae, Hyacinthaceae, and Amaryllidaceae.
There are many cases where a single pollinator is responsible for pollinating many species of plants, for example long-tongued flies (Tabanidae and Nemestrinidae) are the exclusive pollinators of many genera of petaloid monocots as well as Pelargonium and Erica; a butterfly is the exclusive pollinator of a phylogenetically disparate group of red-flowered and autumn-flowering species; hopliine (monkey) beetle pollination has evolved convergently in many genera, etc.
But here it might be argued, on the other hand, that the spheroidal Echinoids, in reality, depart further from the general plan and from the embryonic form than the elongated Spatangoids do; and that the peculiar dental apparatus and the pedicellariae of the former are marks of at least as great differentiation as the petaloid ambulacra and semitae of the latter.
The tulip has a tendency to produce double flowers: one specimen seen with a regular three-leaved perianth, eight stamina, and four carpellary ovary, angles opposite the outer perianth leaves; the upper leaf or bract has a tendency to become petaloid.
The petals of cucurbita were observed in one instance united along two of the corollal sinuses to the staminal column, alternating with the smaller stamina; the processes were produced upwards into petaloid appendages.