Stylidium kunthii is a dicotyledonous plant that belongs to the genus Stylidium and is one of the few species in the genus that is not native to Australia. It is an erect annual plant that grows from 8 to 20 cm tall. Obovate, orbicular, or obleanceolate leaves, about 5-15 per plant, form terminal rosettes with some scattered along the stems. The leaves are generally 4–15 mm long and 2–9 mm wide. This species generally has one to five scapes and cymose inflorescences that are 5–14 cm long. Flowers are white or pink. S. kunthii has a wide distribution in Southeast Asia, ranging from eastern India to Myanmar, Bengal, and Vietnam. Its typical habitats include the wet soils of rice fields, natural grasslands, and road cuttings at an altitude of less than 200 metres. It flowers from November to December. S. kunthii is most closely related to S. uliginosum, but differs by the cauline leaves.
Stylidium alsinoides is a dicotyledonous plant that belongs to the genus Stylidium. It is an erect annual plant that grows from 18 to 30 cm tall. Obovate or elliptical leaves, about 20–100 per plant, are scattered along the elongate, glabrous stems. The leaves are generally 5.5–14 mm (0.22–0.55 in) long and 3–8 mm (0.12–0.31 in) wide. The bracts on the inflorescence can be as large as leaves and may be hard to distinguish them except for their growth habit: the leaves are alternate whereas the bracts are opposite.
Stylidium fluminense is a dicotyledonous plant that belongs to the genus Stylidium. It is an erect annual plant that grows from 15 to 30 cm tall. Elliptical leaves, about 10-40 per plant, are scattered along the stems. The leaves are generally 5–19 mm long and 1.5–6 mm wide. This species lacks a scape but has cymose inflorescences that are 5–11 cm long. Flowers are pink, mauve, or red. S. fluminense is found in northwestern Australia, including confirmed locations in the Hamersley Ranges and the Harding River near Karratha. Its typical habitat is sheltered sites with persistent moisture in sandstone gorges. It flowers in the southern hemisphere from June to October. S. fluminense is most closely related to S. alsinoides. Its conservation status has been assessed as data deficient.
Stylidium accedens is a dicotyledonous plant that belongs to the genus Stylidium. S. accedens is found around and northeast of Katherine in the Northern Territory of Australia.
Stylidium candelabrum is a dicotyledonous plant that belongs to the genus Stylidium. It is an erect annual plant that grows from 6 to 20 cm tall. Elliptical leaves, about 11-100 per plant, are scattered along the stem. The leaves are generally 2.5–18 mm long and 1.5–9 mm wide. This species generally has 1-13 scapes and cymose inflorescences that are 3–16 cm long. Flowers are white. S. candelabrum is endemic to the northernmost area of the Northern Territory in Australia and much of its range is within a national park and therefore has been evaluated to be neither rare nor threatened. Its typical habitat is shallow sand associated with sandstone pavements and it appears to prefer areas with higher rainfall. It flowers in the southern hemisphere from March to July. Its conservation status has been assessed as secure.
Stylidium divergens is a dicotyledonous plant that belongs to the genus Stylidium that was described as a new species in 2000. The specific epithet divergens means diverging or separating, referring to the widely spreading posterior petals. It is an erect annual plant that grows from 7 to 27 cm tall. Obovate, orbicular, or elliptical leaves, about 2-6 per plant, form a basal rosette. The leaves are generally 4–21 mm long and 3–5 mm wide. This species generally has one to six scapes and cymose inflorescences that are 4–24 cm long. Flowers are white or mauve. S. divergens is endemic to Kakadu National Park in the Northern Territory of Australia. Its typical habitats are sandstone slopes and gullies. It flowers in the southern hemisphere in April. S. divergens is most closely related to S. accedens. Its conservation status has been assessed as data deficient.
Stylidium ensatum is a dicotyledonous plant that belongs to the genus Stylidium that was described as a new species by A.R. Bean in 2000, though the taxon had been noted by Rica Erickson in her discussion of S. muscicola variation in 1958. The specific epithet ensatum is from the Latin ensatus, meaning sword-like, which refers to the shape of the floral throat appendages of this species. It is an erect annual plant that grows from 14 to 22 cm tall. Obovate or orbicular leaves, about 6-17 per plant, are scattered along the stems. The leaves are generally 7–12 mm long, 5.5–12 mm wide, and lack petioles. This species generally has one to three scapes and cymose inflorescences that are 8–16 cm long. Flowers are pink or mauve. S. ensatum is endemic to the area around Darwin in the Northern Territory of Australia. Its habitat has been reported as being a "Melaleuca viridiflora-Lophostemon lactifluus forest with damp peaty soil." It flowers in the southern hemisphere from June to July. S. ensatum is most closely related to S. muscicola. Its conservation status has been assessed as data deficient.
Stylidium muscicola is a dicotyledonous plant that belongs to the genus Stylidium that was described by Ferdinand von Mueller in 1859. It is an erect annual plant that grows from 5 to 33 cm tall. Obovate or orbicular leaves, about 4-20 per plant, form terminal rosettes with some scattered along the stems. The leaves are generally 6–33 mm long and 5–28 mm wide. This species generally has one to eight scapes and cymose inflorescences that are 3–17 cm long. Flowers are white, pink, or mauve. S. muscicola's native range is concentrated in and around western Kimberley in Western Australia and extends to the northern parts of the Northern Territory and east almost to Queensland. Its typical habitat is a sheltered area along a sandstone ridge in sandy soils that remain moist in the dry seasons. It flowers in the southern hemisphere from February to September.
Stylidium schizanthum is a dicotyledonous plant that belongs to the genus Stylidium that was described by Ferdinand von Mueller in 1859. It is an erect annual plant that grows from 9 to 30 cm tall. Obovate, orbicular, or oblanceolate leaves, about 3-13 per plant, form basal rosettes. The leaves are generally 3.5–23 mm long and 1.5–12 mm wide. This species generally has one to four scapes and cymose inflorescences that are 9–30 cm long. Flowers are white, pink, mauve, or yellow. S. scizanthum's distribution ranges from the Kimberley region in Western Australia through the Northern Territory and into northern Queensland. It has been reported as far south as Mount Surprise and even in southern New Guinea. Its typical habitats are moist sand in Eucalyptus or Melaleuca communities, near creekbanks, or associated with sandstone landscapes. It flowers in the southern hemisphere from February to October. S. schizanthum is closely related to both S. pachyrrhizum and S. lobuliflorum.
Stylidium tenerum, the swamp triggerplant, is a dicotyledonous plant that belongs to the genus Stylidium that was described by Curt Polycarp Joachim Sprengel in 1826. Robert Brown had described this species in 1810 under the name S. tenellum, a name which had already been used for another species in 1805 by Olof Swartz. To add to the confusion, Rica Erickson had described and illustrated this taxon in 1958 under the name S. uliginosum, another currently accepted name for a related species.
Stylidium dunlopianum is a dicotyledonous plant that belongs to the genus Stylidium. It is an erect perennial plant that grows from 15 to 50 cm tall. Obovate leaves, about 6-12 per plant, form a basal rosette with some scattered along the stem. The leaves are generally 20–60 mm long and 7–19 mm wide. This species generally has one to five scapes and cymose inflorescences that are 13–40 cm long. Flowers are pink or mauve. S. dunlopianum's distribution ranges from the Mitchell River area in Western Australia east to the Kakadu National Park in the Northern Territory. Its typical habitats include sandy or black organic soils along creekbanks, near rainforests, or in seepage areas in Melaleuca leucadendra swamps. It flowers in the southern hemisphere from May to November. S. dunlopianum is most closely related to S. rotundifolium, but differs most significantly by its thickened stem base and growth habit. S. dunlopianum is a perennial whereas S. rotundifolium is an annual. Its conservation status has been assessed as data deficient.
Stylidium aquaticum is a dicotyledonous plant that belongs to the genus Stylidium. The specific epithet aquaticum refers to this species' typical habitat. It is an annual plant that grows from 18 to 30 cm tall. Linear leaves, about 20-100 per plant, are scattered along the elongate, glabrous stem. The leaves are generally 1.7–11 mm long and 0.1-0.3 mm wide. Petioles and scapes are absent. Inflorescences are 3–8 cm long. Flowers are pink or white. S. aquaticum is only known from its type location in northwestern Northern Territory of Australia. Its habitat is recorded as being a Melaleuca viridiflora swamp, growing in shallow water at a depth of around 7 cm. It flowers in the southern hemisphere in May. S. aquaticum is most closely related to S. fissilobum but differs mostly in the leaf shape. Its conservation status has been assessed as data deficient.
Stylidium capillare is a dicotyledonous plant that belongs to the genus Stylidium. It is an annual plant that grows from 6 to 13 cm tall. Obovate or orbicular leaves, about 4-7 per plant, form basal rosettes around the compressed stems. The leaves are generally 1.5–5 mm long and 1–3 mm wide. Petioles are absent. This species usually has one to two scapes per plant and 6–13 cm long inflorescences. Flowers are white and bloom from March to June in the southern hemisphere. S. capillare's distribution ranges from Litchfield National Park in the Northern Territory east to Cooktown Mareeba in northern Queensland, Australia. Its habitat is recorded as being sandy soils in eucalypt woodlands and swampy Melaleuca species communities. S. capillare is most closely related to S. nominatum. Its conservation status has been assessed as secure.
Stylidium fissilobum is a dicotyledonous plant that belongs to the genus Stylidium. It is an annual plant that grows from 5 to 50 cm tall. Linear or deltate leaves, about 4-34 per plant, are scattered along the elongate, glabrous stem. The leaves are generally 1–6 mm long and 0.3-0.7 mm wide. Petioles and scapes are absent. Inflorescences are 3–18 cm long. Flowers are pink, white, or mauve and bloom from March to July in the southern hemisphere. S. fissilobum's wide distribution ranges across northern Australia from the western Kimberley region and Northern Territory eastward as far as Mount Surprise in Queensland. Its habitat is recorded as being wet sands at swamp edges in association with grasslands and sedgelands. Due to its weak stem, this species often threads its way through supporting branches and leaves of the dense grass and sedge cover. S. fissilobum is most closely related to S. aquaticum and S. oviflorum. Its conservation status has been assessed as data deficient.
Stylidium claytonioides is a dicotyledonous plant that belongs to the genus Stylidium. It is an annual plant that grows from 15 to 27 cm tall. The linear leaves, about 9-30 per plant, are mostly in terminal rosettes but with some scattered along the elongate, glabrous stem. The leaves are generally 12–24 mm long and 0.7–1 mm wide. Petioles are absent. This species produces one to six scapes per plant. Inflorescences are 10–18 cm long and produces a single pink and mauve flower that blooms from May to June in the southern hemisphere. S. claytonioides is endemic to the Kimberley region in Western Australia. Its habitat is recorded as being seasonal swamps near sandstone outcroppings and near creekbanks. Its conservation status has been assessed as data deficient.
Stylidium ericksoniae is a dicotyledonous plant that belongs to the genus Stylidium. It is an annual plant that grows from 6 to 15 cm tall. The linear or deltate leaves, about 20-100 per plant, are mostly in terminal rosettes but with some scattered along the elongate stem. The leaves are generally 4.0–9.5 mm (0.16–0.37 in) long and 0.6–1.1 mm (0.024–0.043 in) wide. Petioles are absent. This species produces 1–20 scapes per plant. Inflorescences are 5–11 cm (2.0–4.3 in) long and produces a single pink or mauve flower that blooms from March to August in the southern hemisphere. S. ericksoniae is endemic to the northern areas of the Northern Territory of Australia. Its habitat is recorded as being damp sand near sandstone rocks or on swampy drainage channels. It's been found in association with Micraira and Pandanus species. S. ericksoniae is most closely associated with S. pedunculatum. Its conservation status has been assessed as data deficient.
Stylidium pedunculatum is a dicotyledonous plant that belongs to the genus Stylidium. It is an annual plant that grows from 5 to 10 cm tall. The linear or deltate leaves, about 20-200 per plant, are mostly in terminal rosettes but with some scattered along the elongate stem. The leaves are generally 4.5-8.5 mm long and 0.5-0.8 mm wide. Petioles are absent. This species produces 2-14 scapes per plant. Inflorescences are 4–7 cm long and produces a single white or pink flower that blooms from March to September in the southern hemisphere. S. pedunculatum's distribution is scattered in the tropical areas of Queensland and the Northern Territory and isolated in the Aru Islands. Its habitat is recorded as being damp, sandy soils in open Melaleuca viridiflora communities. It's been found in association with Drosera, Schoenus, and Utricularia species. S. pedunculatum is most closely associated with S. ericksoniae. Its conservation status has been assessed as data deficient.
Stylidium floribundum is a dicotyledonous plant that belongs to the genus Stylidium. S. floribundum's distribution ranges from the Kimberley region of Western Australia across northern Australia to northwestern Queensland.
Stylidium ornatum is a dicotyledonous plant that belongs to the genus Stylidium. It is an herbaceous annual or perennial that grows from 10 to 30 cm tall. Oblanceolate leaves, about 5-25 per plant, form either a basal rosette with stems absent or in terminal rosettes when plant stems are present. The leaves are generally 13–37 mm long and 3–10 mm wide. This species produces 1-4 scapes per plant. Inflorescences are 12–30 cm long and produce pink flowers that bloom all year in their native range. S. ornatum is endemic to Queensland and New South Wales. Its typical habitat has been reported as sandy soils in heathland or "wallum" on waterlogged coastal sands. S. ornatum is closely related to S. debile. Its conservation status has been assessed as secure.
Stylidium eriorhizum is a species that belongs to the genus Stylidium. It is an herbaceous perennial plant that grows from 12 to 25 cm tall. Spathulate to oblanceolate leaves, about 20-100 per plant, form a basal rosette with stems greatly reduced. The leaves are generally 20–60 mm long and 4–10 mm wide. This species produces 1-3 scapes per plant. Inflorescences are 10–23 cm long and produce pink to white flowers that bloom year-round in their native range. S. eriorhizum is endemic to Queensland, where it is widespread from Atherton in the north to Barakula State Forest near Chinchilla in the south. Its typical habitat has been reported as sandy soils in woodlands or heathlands.
