Iridoideae subfamily is one of the two main subfamilies in the popular Iridaceae family. It contains the best-known genus - Iris. The members of this subfamily are widely distributed worldwide. They grow in all continents except Antarctica.
The blooms, which are often scented, are arranged in often terminal inflorescences. Each flower has six petals. In most cases three of them are separated from the others and are specialized in different functions. However some are not, as in Nemastylis. Nectar is produced in their base. In some of the species the stamens are partially fused with the petals.
The species in the subfamily are often used as ornamental plants such as Iris and Tigridia. There are also species members which are at risk in their natural environment such as some subspecies of Ferraria crispa and Moraea villosa.
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