The genus Drosera was divided in 1994 by Seine & Barthlott into three subgenera and 11 sections on the basis of morphological characteristics.
Drosera banksii, commonly known as Banks' sundew, is a small annual species in the carnivorous plant genus Drosera. The reniform-shaped leaves are attached to petioles and arranged in a circular pattern (rosette) around the stem. The 5 mm wide flowers are white. It is native to northern Australia and Southeast Asia. D. banksii was originally described by Robert Brown and validly published by Augustin Pyramus de Candolle in 1824. It is currently classified in the subgenus Lasiocephala, but expert opinion is that it is misplaced and should be reclassified with the closely allied D. subtilis.
Drosera gigantea, the giant sundew, is an erect perennial tuberous species in the carnivorous plant genus Drosera that is endemic to Western Australia. It grows in sandy soils at the margins of swamps and near granite outcrops along the Western Australian coast from Albany north to just south of Geraldton. D. gigantea produces small shield-shaped leaves along many lateral branches that look like a small tree. Individual plants can grow up to 0.2–1 m (0.7–3.3 ft) tall. Because of its tall, tree-like form, it is considered one of the largest Drosera species. It is also easily cultivated and enjoys damp, humid conditions often provided in greenhouses. White flowers emerge from August to November. The red tubers of this species can grow to be 3.8 cm (1.5 in) in diameter and may be a metre below ground.
Drosera macrantha, the bridal rainbow, is a scrambling or climbing perennial tuberous species in the carnivorous plant genus Drosera that is endemic to Western Australia. It grows in a variety of habitats, including winter-wet depressions in sandy, loamy, laterite, or quartzite soils. D. macrantha produces small, cup-shaped carnivorous leaves along a long stem that can be 0.16–1.5 m (0.5–4.9 ft) high as it climbs. Its 1 in (2.5 cm) white or pink flowers emerge from June to November, blooming earlier in the more northern range.
Drosera myriantha, the star rainbow or starry sundew, is an erect perennial tuberous species in the carnivorous plant genus Drosera. It is endemic to Western Australia and is found along the coast south of Perth to Albany. It grows in swampy areas in peaty sand soils. D. myriantha produces carnivorous leaves along stems that can be 15–35 cm (6–14 in) high. White or pink flowers bloom from October to December.
Drosera neesii, the jewel rainbow is an erect or twining perennial tuberous species in the carnivorous plant genus Drosera. It is endemic to Western Australia and grows near swamps or granite outcrops in sand, clay, or laterite. D. neesii produces small, cup-shaped carnivorous leaves in groups of three along stems that can be 15–60 cm (6–24 in) high. Pink flowers bloom from August to December.
Drosera radicans is an erect perennial tuberous species in the carnivorous plant genus Drosera. It is endemic to Western Australia and is only found in a relatively small area north of Geraldton. It grows in winter-wet areas in sand or sandy clay soils. D. radicans produces small carnivorous leaves along stems that can be 7–18 cm (3–7 in) high. White flowers bloom from August to September.
Drosera salina is an erect perennial tuberous species in the carnivorous plant genus Drosera. It is endemic to Western Australia and is only found in salt-free sand on the margins of salt lakes in a few locations north of Albany east to north-west of Esperance. The specific epithet, salina, refers to the salt lake margins that this species inhabits. D. salina produces small carnivorous leaves along stems that can be 7 cm (3 in) high. White flowers bloom from July to September.
Drosera stricticaulis, the erect sundew, is an erect perennial tuberous species in the carnivorous plant genus Drosera. It is endemic to Western Australia and is found near watercourses and granite outcrops in sandy clay or loam. D. stricticaulis produces small, cup-shaped carnivorous leaves along green, glandular stems that can be 25 cm (10 in) high. Pink flowers bloom from July to October.
Drosera subhirtella, the sunny rainbow, is a scrambling or climbing perennial tuberous species in the carnivorous plant genus Drosera. It is endemic to Western Australia and is found in sandplains, granite outcrops, and swamp margins in sand, clay, and loam soils. D. subhirtella produces small carnivorous leaves along stems that can be 40 cm (16 in) high. Yellow flowers bloom from August to October.
Drosera sulphurea, the sulphur-flowered sundew, is a scrambling perennial tuberous species in the carnivorous plant genus Drosera. It is endemic to Western Australia and is found in coastal areas in sandy loam, often among Cephalotus. D. sulphurea produces small, shield-shaped carnivorous leaves along stems that can be 40–60 cm (16–24 in) high. Yellow flowers bloom in September.
Drosera zigzagia is an erect perennial tuberous species in the carnivorous plant genus Drosera. It is endemic to Western Australia and is found on the margins of salt lakes in brown sandy loam, often associated with D. salina, Stylidium insensitivum, S. pulviniforme, Levenhookia leptantha, and Frankenia species. Drosera zigzagia produces small, solitary carnivorous leaves that alternate along a zigzag stem, which can be 5–7 cm (2.0–2.8 in) high. Yellow flowers are borne on 4–9-flowered inflorescences that bloom from August to September.
Drosera sessilifolia is a species in the carnivorous plant genus Drosera that is native to Brazil, Guyana, and Venezuela and grows in sandy or gravelly soils in seasonal seepages where a thin film of water collects. It produces a rosette of small, wedge-shaped to round carnivorous leaves that are usually yellowish but become redder with age. Inflorescences produce pink-lilac flowers. It has a chromosome number of 2n = 20.
Drosera subg. Thelocalyx is a subgenus of two species in the genus Drosera. Both species appear to be very similar and are often confused in cultivation; both have small leaves arranged in a rosette and are annual plants. Their distributions do not overlap, however, with D. burmannii in Southeast Asia and Australia and D. sessilifolia in Brazil, Guyana, and Venezuela.
Drosera glanduligera, the pimpernel sundew, is a rosetted annual species in the carnivorous plant genus Drosera that is endemic to Australia. It is 2.5–6 cm (1–2 in) tall and grows in most soil conditions. It produces orange flowers from August to November. It was originally described in 1844 by Johann Georg Christian Lehmann. It is the sole species in the subgenus Coelophylla, which Jan Schlauer elevated from section rank in 1996; it was originally described by Jules Émile Planchon in 1848.
Drosera meristocaulis is a perennial species in the carnivorous plant genus Drosera, the only member of the subgenus Meristocaulis. It is a small, rosette- and branched stem-forming sundew that has many morphological affinities to the Australian pygmy sundews. D. meristocaulis is wholly endemic to Pico da Neblina, an isolated mountain on the Brazil-Venezuela border.
Drosera falconeri is a carnivorous plant in the genus Drosera. It is endemic to the Northern Territory in Australia.
Drosera kenneallyi is a carnivorous plant in the genus Drosera and is endemic to the Kimberley region in northern Western Australia. Its leaves are arranged in a compact basal rosette appressed to the soil. Narrowly oblanceolate petioles emerging from the center of the rosette are typically 1.5–2.2 mm wide at their widest. Red carnivorous leaves at the end of the petioles are small at 2–3 mm in diameter and elliptic to broadly ovate. Inflorescences are 12.5–20.5 cm (5–8 in) long with white flowers being produced on 10- to 20-flowered racemes from November to December.
Drosera subg. Lasiocephala, sometimes collectively known as the petiolaris-complex, is a subgenus of 14 species in the genus Drosera. These species are distinguished by their subpeltate to peltate lamina.
