This flower of Haworthiopsis attenuata was photographed during November. Spring is the normal blooming season for the species. The height of the inflorescence is around 40 cm when all is well with the plant. The peduncle may be branched, producing multiple racemes in a panicle.
There may be more than 20 flowers on one raceme. They are spirally arranged and two flowers open at a time, beginning at the bottom. The perianth tube is white with a green keel down the centre on the outside of each corolla segment. The flower tube is narrow and long, about 1,5 cm when fully developed. When the flower opens, the segment tips recurve as in the picture.
The arrangement of three inner and three outer tepals (or perianth segments) is shared with other Asphodelaceae flowers, such as the aloes and also the lilies, the larger family that once included Asphodelaceae.
As with living plants, so with living human systems approximating (but never equalling) nature: One small step was added in 2013 in the quest for catching up with the true state of affairs in the Haworthia genus by separating 18 species, the earlier subgenus Hexangulares into the new genus of Haworthiopsis. This was done on account of the outcome of phylogenetic studies indicating separate ancestors for members of the two genera.
The vertical arrangement of the corolla segments, the hallmark of the haworthias, can be observed in the photo: one inner and two outer segments above and two inner and one outer segments below (Scott, 1985).