flower-of-an-hour

noun

1. a malvaceous Old World herbaceous plant, Hibiscus trionum , having pale yellow flowers with a bladder-like calyx Also calledbladder ketmia

Example Sentences

A low, rather hairy annual; upper leaves 3-parted, with lanceolate divisions, the middle one much the longest; fruiting calyx inflated, membranaceous, 5-winged; corolla sulphur-yellow with a blackish eye, ephemeral; hence the name flower-of-an-hour.

From Project Gutenberg