Omphalissa

Omphalissa is an unaccepted subgenus   of genus Hippeastrum, within the family Amaryllidaceae. Originally described by Richard Anthony Salisbury in 1866.

Description
Robust habit, two to four large flowers. Perianth with a short tube(< 4 cm), paraperigonium curved closing the throat by a distinct neck. Stigma trifid or capitate, lobes > 2 mm. Spathe slit to the base. Ribbon-like leaves, 2.5 to 5 cm broad. Many dry, flat seeds.

Taxonomy
Salisbury originally described the Omphalissa as a subgroup of the Zephyrantheae, then a tribe within the Amaryllidaceae, in which he included Amaryllis (now Hippeastrum) aulica and A. calyptrata. This was subsequently more formally defined by John Gilbert Baker in 1888, as a subgenus of Hippeastrum with six species. Baker's six species were;
 * Hippeastrum aulicum
 * Hippeastrum organense (now Hippeastrum correiense)
 * Hippeastrum psittacinum
 * Hippeastrum calyptratum
 * Hippeastrum cybister
 * Hippeastrum pardinum

Ecology
Contains the epiphytic species of Hippeastrum.