Cleistogamy

Cleistogamy [ Botany ]
Adjective: Cleistogamous

Dictionary of botanic terminology - index of names

Cleistogamy is the condition of having perfect fertile flowers which do not open but self-pollinate with the production of a lot of seeds.

A cleistogamous cactus
Frailea castanea

Cleistogamous flowers are typically undeveloped and inconspicuous, closed, and lack petals, scent or nectar. They are always fertile while the more perfect flowers of the same plant are usually nearly or completely sterile. Practically all cleistogamous plants can also produce normal open (or chasmogamous) flowers. Cleistogamy appears to be related to environmental conditions: when the environment is harsh, plants are more likely to produce cleistogamous flowers

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