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Flowers solitary, nearly sessile in a tubular sac-like involucre, destitute of floral envelopes.

Having some portion of the floral envelopes attached to the pericarp to form the fruit, as in the checkerberry, the mulberry, and the pineapple.

Their flowers without floral envelopes; pistils two; fleshy and hairy; stigmas filiform; dark.

On opening the pointed spathe or floral envelope, a club-like mass will be noted arising from its base.

The term anthocarpous has also been applied as indicating that the floral envelopes as well as the carpels are concerned in the formation of the fruit.