petaloid

Lip free, deeply concave at base, narrowly constricted and somewhat jointed in the middle, the upper portion dilated and petaloid.
The Manual of the Botany of the Northern United States|Asa Gray
In Iris it is situated on a cleft on the back of the petaloid divisions of the style (fig. 103).
Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5|Various
Sometimes, as in Canna, one of the anther-lobes becomes abortive, and a petaloid appendage is produced.
Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5|Various
Within this petaloid perianth is a membranous one, together with a boat-shaped bracteolate body, entire.
Journals of Travels in Assam, Burma, Bhootan, Afghanistan and The|William Griffith

The specimens collected were sessile and the pileus lateral, somewhat broadened at the free end, or petaloid.
Studies of American Fungi. Mushrooms, Edible, Poisonous, etc.|George Francis Atkinson

British Dictionary definitions for petaloid

petaloid

/ (ˈpɛtəˌlɔɪd) /

adjective

biology resembling a petal, esp in shapethe petaloid pattern on a sea urchin

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