Im·mor·telle n.; pl. Immortelles Bot. A plant with a conspicuous, dry, unwithering involucre, as the species of Antennaria, Helichrysum, Gomphrena, etc. See Everlasting.
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Antennaria
n : small woolly perennial herbs having small whitish discoid
flowers surrounded by a ring of club-shaped bristles
[syn: genus Antennaria]