Greek rhodon - red, phiala - drinking vessel.

Bulbs often with a conspicuous neck. Leaves dying down, to about 1 cm wide, linear, flat. Main stalk hollow. Spathes 2, free or fused on 1 side. Flowers 1-7, irregular, funnel-shaped with a short tube, individual stalks thin. Stamens united and of 4 different lengths, bent down then up. Seeds black, winged.

Often treated as a part of the genus Hippeastrum.

Offsets.

Spathe bracts clearly fused on one side.

30 species in South America with a centre of distribution in Chile.

Traub (1956).

Source: Ashburner, W.; Ashburner, C.; Spencer, R. (2005). Narcissus. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 5. Flowering plants. Monocotyledons. The identification of garden and cultivated plants. University of New South Wales Press.