Drosera tracyi is a tall, pale thread-leaved sundew from the Gulf Coastal Plain of the United States. A mature plant can form a striking cluster of long, adhesive leaves, yet its warm-temperate origin matters as much as its size. Treating it as interchangeable with a northern D. filiformis can create avoidable winter problems.
A species with its own identity
Kew accepts Drosera tracyi at species rank. Older horticultural and botanical works frequently place it beneath D. filiformis as var. tracyi. Retain those historical names when recording where a plant came from, while using the accepted species name for the current entry. Kew taxonomic account.
The Flora of North America describes leaves around 30–50 cm long and relatively large rose-coloured flowers, with white-flowered plants also known. The glandular hairs are typically pale compared with those of D. filiformis. Its native range extends from south-western Georgia across the Gulf Coastal Plain toward south-eastern Louisiana. Flora of North America.
Those features should be used together. A juvenile tracyi may be short, and a hybrid may be tall. John Brittnacher's comparative cultivation study found variation in tentacle colour and noted uncertainty surrounding some long-cultivated plants received under a species label. Reliable source information and mature flowers improve an identification far more than height alone. Brittnacher's comparative study.
Freshwater seepages and open wetlands
Its habitats include hillside seepage bogs, pond margins and transitions between pine savannas and wetter vegetation. These are freshwater environments. The Florida Native Plant Society describes moist, acidic growing conditions and specifically distinguishes them from salty or brackish inundation. “Coastal” therefore does not mean salt-tolerant. Florida Native Plant Society.
That distinction is useful when choosing materials for a pot. Marine sand or a mineral-rich ornamental water feature cannot be assumed suitable because the species occurs near the Gulf Coast. Keep the source of water and substrate known rather than guessing from a geographic common name.
Winter rest without northern hardiness
The ICPS reports that D. tracyi forms winter hibernacula but is vulnerable to early and late freezes. Its author also describes cultivation difficulties under some mild, wet winter regimes. A protected cool greenhouse is one option discussed in the guide. Having a winter bud is not evidence that every dormant plant tolerates severe freezing. ICPS cultivation guidance.
Brittnacher's Oregon observations reinforce that caution: outdoor losses differed substantially among winters. That experience is useful evidence of sensitivity under his conditions, rather than a precise lethal temperature for every clone. For an Australian collection, record actual exposure at the pot and the timing of growth, rather than transferring a foreign climate-zone number directly to a balcony or greenhouse.
Leave enough vertical space for unfurling leaves and enough separation to inspect the crown. A crowded arrangement makes it harder to see whether new growth is healthy and encourages repeated handling of delicate leaves. Positioning the plant well at the outset is simpler than repeatedly moving a large specimen.
Seed, hybridisation and naming
The Florida Native Plant Society lists seed propagation and stresses surface sowing. Record seed provenance, treatment and germination dates separately for each lot. A packet collected from an open flowering collection is not the same evidence of parentage as a controlled pollination.
Rice's review explains the historical debate over the two thread-leaved species and documents their hybrid relationship. Named horticultural selections and the botanical hybrid D. × californica should remain distinct from pure D. tracyi. Do not assign a cultivar name to an attractive seedling solely because it resembles a photograph. Rice's taxonomic review.
For growers, the essential combination is a verified identity, a freshwater wetland growing regime and winter protection appropriate to the actual plant. With those recorded, this tall sundew becomes a much more understandable addition to a seasonal collection.
Nano Nursery Drosera Encyclopedia — species profile. Related core chapters: 26 and 29. Reviewed 23 September 2026. Cultivation guidance concerns established plants; recently deflasked plants need separate acclimatisation.
