involucre

views updated May 18 2018

involucre A protective structure in some flowering plants and bryophytes. In flowering plants it consists of a ring of bracts arising beneath the flower cluster of those species with a capitulum (i.e. members of the dandelion family) or an umbel (i.e. members of the carrot family). In mosses and liverworts the involucre is a projection of tissue from the thallus that arches over the developing archegonium.

A Dictionary of Biology

involucre

views updated May 21 2018

involucre A whorl of bracts below an inflorescence.

A Dictionary of Plant Sciences MICHAEL ALLABY

involucre

views updated Jun 27 2018

involucre envelope XVI; (bot.) whorl of bracts XVIII. — F. involucre or L. involūcrum, f. involvere INVOLVE.

The Concise Oxford Dictionary of English Etymology T. F. HOAD

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involucre

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