accrescent

American Heritage® Dictionary of the English Language, Fourth Edition

1. adj. Increasing in size after flowering, as the calyx of the ground cherry.

Century Dictionary and Cyclopedia

1. Increasing; growing. Specifically, in botany, applied to parts connected with the flower which increase in size after flowering, as frequently occurs with the calyx, involucre, etc.

Wiktionary

1. adj. Growing; increasing.
2. adj. botany Growing larger after flowering.

GNU Webster's 1913

1. adj. Growing; increasing.
2. adj. (Bot.) Growing larger after flowering.