Drosera callistos is a small Western Australian sundew with flowers that can rival its rosette in width. The most useful identification detail lies at the centre of those orange blooms.
Name and range
Kew accepts D. callistos N.G.Marchant & Lowrie, published in 1992, as a perennial native to south-western Australia. Kew taxonomic record
Identifying the plant
Fierce Flora describes a flat rosette around 2 cm across and metallic orange, dark-centred flowers of similar width. Three thickened, club-shaped stigmas help distinguish it from related orange-flowered pygmies. Its account contrasts them with the more slender structures of D. miniata and D. bindoon. Field description and comparisons
A broad orange flower with a black centre is therefore only the beginning of an identification. Examine the reproductive structures in a sharply focused close-up and preserve a view of the leaves and flowering stalk as well.
Habitat and season
The field account places the species in lateritic ground along the Darling Scarp east of Perth, flowering in spring and resting over summer. Habitat account
That natural cycle explains the importance of observing seasonal change, but does not supply a universal date for drying a pot. A collection’s light, temperature and moisture patterns may not follow those of a wild hillside.
Growing and propagating it
Carlton Carnivores recommends bright conditions and a moist, sand-rich substrate during active growth. Its suggested starting mix is three parts sand to one part peat. It specifically advises against complete summer drying in cultivation because dormant plants can be difficult to restart. The guide describes gemmae as a propagation route and seed as less frequent. Cultivation account
The apparent contrast between wild summer rest and cautious watering in a pot is useful. Habitat observations describe what plants experience; a growing recommendation tries to reproduce the useful parts of that cycle within the limits of a container.
A research note
A 1996 cytological study reported 2n = 28 chromosomes in the material it examined. Such a count is a property of the studied material, not a visual identification test for every plant offered under the name. Original chromosome study
For an ordinary collection, the more practical evidence remains a documented source, good flower photographs and observations across the year. Those records allow meaningful comparison without confusing a beautiful bloom with a complete determination.
Nano Nursery Drosera Encyclopedia — species profile. Related core chapters: 16, 17 and 29. Reviewed 23 September 2026. Cultivation guidance concerns established plants.
