Eucharis is a genus of bulbous perennial plants belonging to the family Amaryllidaceae, within the order Asparagales. Native to the tropical regions of South and Central America — including Bolivia, Brazil, Colombia, Ecuador, Peru, and several countries of Central America — the genus is widely known by the common name Amazon lily. Plants in Eucharis produce strap-like leaves and elegant, white, nodding flowers that closely resemble daffodils, typically borne in umbels on tall scapes rising from bulbs.
Taxonomically, the genus has undergone significant revision: modern treatments subsume Eucharis into the broader genus Urceolina, so that species formerly placed in Eucharis (such as the well-known Eucharis amazonica and Eucharis grandiflora) are now formally recognised as Urceolina amazonica and Urceolina × grandiflora respectively. Despite this, the name Eucharis remains in widespread horticultural use. The former genus comprised roughly 20 species, all occurring in the Neotropical region.
Several species are valued ornamentals and have been cultivated for centuries in tropical gardens and as greenhouse plants in temperate regions. They have also been introduced beyond their native range, with naturalised populations recorded in India and Sri Lanka. Conservation status is a concern for several species, with some taxa threatened or functionally extinct in the wild.
Etymology
The name Eucharis derives from the Greek eucharis (εὔχαρις), meaning "graceful" or "pleasing" — a reference to the elegant, fragrant white flowers of the type species. The name was applied in the nineteenth century to reflect the ornamental beauty of these Amazon lilies.
Distribution
Eucharis (Urceolina) is native to tropical South and Central America, with the core range covering Bolivia, Brazil, Colombia, Costa Rica, Ecuador, Guatemala, Panama, and Peru. Species occur primarily in humid montane and lowland forests. The genus has been introduced to parts of South Asia, with naturalised populations known from India and Sri Lanka.
Cultivation
Amazon lilies are propagated by removing offsets from the parent bulb, ideally in spring; offsets are potted individually in 15 cm pots in good loamy soil mixed with sand for drainage. Plants require consistently warm temperatures — approximately 18–20 °C at night and up to 25 °C during the day. Active growth in summer should be encouraged by repotting; afterwards a brief rest period with reduced watering promotes subsequent flowering, though the bulbs must not dry out completely as the plants are evergreen. With a succession of pot-grown plants started at intervals, flowering can be maintained throughout the year.
Conservation
Multiple species within the genus are threatened. Urceolina hartwegiana (formerly Caliphruria hartwegiana) and U. subedentata are considered threatened with extinction, and U. tenera is listed as extinct. The restricted ranges and specialist forest habitats of many species render them vulnerable to deforestation and habitat degradation across their South American range.
Taxonomy Notes
The genus Eucharis, as traditionally circumscribed, is now treated as a synonym of Urceolina (Amaryllidaceae, order Asparagales). All formerly accepted Eucharis species have been transferred to Urceolina; for example, Eucharis amazonica is now Urceolina amazonica (Linden ex Planch.) Christenh. & Byng, and Eucharis sanderi is Urceolina sanderi (Baker) Traub. The related genus Caliphruria was likewise subsumed into Urceolina at the same revision. The name Eucharis persists broadly in horticultural literature.
