Linked from
The 14 pages that link to Tepal, each with the reason it gives.
LiliaceaeRelated: Many members have six similar-looking floral segments.
MagnoliaRelated: Magnolia flowers have tepals rather than sharply differentiated petals and sepals.
IridaceaeRelated: Many iridaceous flowers have six similar perianth segments arranged in two whorls.
JuncusRelated: Juncus flowers typically have six tepals surrounding their reproductive organs.
AlstroemeriaRelated: Alstroemeria flowers have six tepals arranged in two whorls.
GalanthusRelated: Snowdrop flowers have six tepals arranged in two whorls.