- pertaining to or having pollination occurring in unopened flowers.
Also cleis·to·gam·ic [klahy-stuh-gam-ik] /ˌklaɪ stəˈgæm ɪk/.
Origin of cleistogamous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- self-pollination and fertilization of an unopened flower, as in the flowers of the violet produced in summerCompare chasmogamy
- Of or relating to a flower that does not open and is self-pollinated in the bud. The fertile flowers of the violet are inconspicuous and cleistogamous, while the plant's more familiar showy flowers are usually infertile.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.