English: A tuberculate seed capsule of Datura metel 'Fastuosa' nearing maturity - about a fortnight before the irregular dehiscence of this fruit began. Note purple tubercles (warts), thin rings left by abcission of two corollas and thick green reflexed frill /disc derived from lowest portion of calyx after abcission of the greater part of this structure, not long after pollination. Note also colour contrast between green peduncle and purple-black stem.

There is considerable variation in the surface texture of the fruits of this form of Datura metel, some, like this one, bearing smooth warts, some bearing short spines and some peg-like warts intermediate between the two.

Datura metel is still accorded species status, despite the fact that it is almost certainly an array of decorative forms created by pre-Columbian horticulturalists from the wild D. innoxia, these having been selected/bred for showy, long-lasting flowers with double or triple corollas followed by unarmed (or lightly-armed) seed capsules less hurtful to a gardener's hand than the long spined fruits borne by truly wild Datura spp.