Drosera cuneifolia is a broad-leaved rosette sundew associated with the Cape Peninsula. It rewards careful identification: a familiar name on a nursery label may reflect an older, broader interpretation of the species, and seasonal behaviour deserves closer attention than a generic subtropical-sundew care sheet provides.
Leaves, flowers and locality
SANBI describes loosely arranged rosettes with wedge-shaped leaves approximately 20–40 mm long and 10–15 mm wide. The undersides are relatively smooth, and the flowering stalk carries pink to mauve flowers. The species is associated with damp, peaty or sandy fynbos situations around the Table Mountain complex. SANBI botanical account
Andreas Fleischmann’s 2018 revision places true D. cuneifolia around Table Mountain and its surroundings, while recognising D. xerophila as a separate species. Consequently, older identifications should be evaluated against the revised characters, not accepted solely because the plant has a flat green rosette. 2018 taxonomic revision
For an identification record, include leaf shape, the underside of a mature leaf, stipules and flower structure. Retain the original label beside a proposed correction so that the history remains traceable. A revised determination is useful information; silently discarding an older name destroys information.
Seasonal growth needs observation
SANBI describes winter growth and a usual summer rest. This should not be converted into a rule that every cultivated plant must lose every leaf on a set date. Observe the actual accession, its environment and its recent treatment before changing its care. SANBI seasonal account
A plant slowing during hot weather, a recently disturbed plant and a plant entering a recurring seasonal pause can look superficially similar. Compare the centre and the newest leaf with earlier photographs. Record the change over time rather than deciding from the oldest leaves alone.
A practical cultivation starting point
SANBI’s grower uses a sandy, well-drained medium in a relatively tall pot, with moisture maintained during active growth. Shallow trays can be allowed to empty while the medium remains moist. Summer-resting plants receive reduced watering without complete drying of the root zone. Published cultivation experience
The distinction between tray water and substrate moisture matters. A tray is an irrigation tool, not a direct measurement of what the roots experience. Before refilling, check whether the pot remains evenly moist; before withholding water, check that the plant really is slowing rather than actively growing through warm conditions.
Use the series’ general water-quality and substrate guidance alongside those seasonal observations. Keep changes gradual enough that the plant’s response remains interpretable. Replacing the mix, relocating the pot and changing irrigation at once makes it difficult to know which change helped or harmed it.
Propagation and naming
For seed, begin with documented parentage and keep the resulting generation distinct from vegetatively maintained stock. A locality attached to a parent should not be promoted into a claim of wild origin for an undocumented mixed-pollen seedling. This is especially relevant where plants labelled under older species concepts coexist.
Photographs of germination, first mature leaves and first flowers create a record that can be reassessed later. If propagation results are not yet known for a particular accession, describe them as observations in progress rather than supplying a guaranteed germination time or success rate.
Why this species belongs in a separate profile
The familiar rosette shape conceals useful botanical differences. A careful D. cuneifolia record connects Cape Peninsula provenance, mature leaf characters and seasonal behaviour. It also leaves room for an identification to change when better material becomes available.
For the collector, that approach has a practical benefit: advice can be attached to an identifiable plant rather than passed around indefinitely under a potentially misapplied name. The most convincing success is a documented accession growing through repeated seasons, not merely a redder photograph after a change in lighting.
Nano Nursery Drosera Encyclopedia — species profile. Related core chapters: 22 and 29. Reviewed 23 September 2026. Cultivation guidance concerns established plants; recently deflasked plants need separate acclimatisation.
