The plant Chasmanthe aethiopica.
Any plant in the genus Arisaema spread in eastern Asia, eastern Africa and eastern North America
A carnivorous plant native to northern California and southern Oregon, Darlingtonia californica
The common zinnia.
An unpopped kernel in a batch of popped popcorn kernels.
The Madagascar periwinkle.
The unmatchable card in that game.
An old woman who has never married; a spinster.
A card game in which cards must be paired and one undesirable card is designated "old maid".