Drosera filiformis
Drosera filiformis, commonly known as the thread-leaved sundew,[1] is a small, insectivorous, rosette-forming species of perennial herb. A species of sundew, it is unusual within its genus in that the long, erect, filiform (thread-like)[1] leaves of this plant unroll in spirals – an arrangement similar to the circinate vernation seen in ferns.
| Thread-leaved sundew | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Caryophyllales |
| Family: | Droseraceae |
| Genus: | Drosera |
| Subgenus: | Drosera subg. Drosera |
| Section: | Drosera sect. Drosera |
| Species: | D. filiformis |
| Binomial name | |
| Drosera filiformis Raf. (1808) | |
| Synonyms | |
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Distribution and habitat
D. filiformis occurs naturally in both Canada and the United States; its natural range extends down the eastern seaboard of North America from south western Nova Scotia[1] in the north down through New England to Florida in the south.
Cultivation
D. filiformis is frequently cultivated, with a few registered cultivars, such as D. filiformis var. filiformis (also known as D. filiformis typical), D. filiformis × 'California Sunset' (a hybrid between D. filiformis var. filiformis.) All of these cultivars are grown with similar conditions as most other Drosera species: mineral-poor soil and distilled, reverse osmosis, or collected rain water. D. filiformis require a winter dormancy for long-term survival, forming hibernacula in the winter.
Infraspecific taxa
- Drosera filiformis f. tracyi (Macf. ex Diels) Macf. (1914)
- Drosera filiformis var. tracyi (Macf. ex Diels) Diels (1906)
- Drosera filiformis var. typica Winne (1944) nom.illeg.
References
