| involucre | <botany> A group of bracts enveloping a condensed inflorescence, a layer of tissue enveloping some plant parts. (28 Oct 1998) |
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| involucred | <botany> Having an involucre, as umbels, heads, etc. Source: Websters Dictionary (01 Mar 1998) |
| involucret | <botany> An involucel. Source: Websters Dictionary (01 Mar 1998) |