a strap-shaped structure; a membranous or hairy appendage on the adaxial surface of a leaf, especially in grasses, at the junction between sheath and blade; a small adaxial appendage near the leaf base in some pteridophytes; the corolla limb in ray flowers of Asteraceae.
(a)A thin, non-green membranous outgrowth or row of hairs often found on the upper and inner side of the leaf blade where it joins the sheath. Occurs in many grasses and some sedges. See drawing of parts of a grass plant. (b)A flattened, strap-shaped part of the ray corolla in the Asteraceae Family.