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 uliginosum 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 4 to 15 cm tall. Obovate or elliptical leaves, about 7-16 per plant, form basal rosettes around compressed stems. The leaves are generally 4.5–11 mm long and 2–4.5 mm wide. This species generally has one to seven scapes and cymose inflorescences that are 4–15 cm long. Flowers are white. S. uliginosum is endemic to Southeast Asia and has a wide distribution, ranging from Thailand to the Guangdong province of southern China. The type location is in Sri Lanka, but it may be extinct there now. Earlier reports list this species as also occurring in Queensland and other parts of Australia, but this was before subsequent revisions revealed those occurrences in Australia were really a different species, S. tenerum, that resembled S. uliginosum. Its typical habitats include sandy, moist soils in open savannah and sandy earth banks at an altitude of less than 200 metres. It flowers from October to March. S. uliginosum is most closely related to S. kunthii and S. tenerum.
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 tenerrimum is a dicotyledonous plant that belongs to the genus Stylidium. It is an erect annual plant that grows from 4 to 30 cm tall. Linear, oblanceolate, or deltate leaves, about 5-24 per plant, are scattered along the stems. The leaves are generally 1.2-4.8 mm long and 0.3-0.8 mm wide. This species lacks a scape but has cymose inflorescences that are 4–11 cm long. Flowers are white and red. S. tenerrimum is found around Darwin in the Northern Territory of Australia and the Victoria River, though it hasn't been recollected there since the type location was chosen. Its typical habitat is sandy soils that remain moist, associated with grasses and sedges. It flowers in the southern hemisphere from April to August. S. tenerrimum is most closely related to S. alsinoides, though it differs by its asymmetrical petals. In his revision of the subgenus Andersonia in 2000, A.R. Bean placed S. evolutum into synonymy and noted that the type specimen of S. mitrasacmoides was not located and thus the application of this synonym is not certain. Tony Bean assessed this species' conservation status as data deficient in 2000.
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 lobuliflorum is a dicotyledonous plant, with a native range is concentrated in and around Kimberley in Western Australia and extends to the Northern Territory.
Stylidium simulans is a dicotyledonous plant that belongs to the genus Stylidium that was described by Sherwin Carlquist in 1979. It is an erect annual plant that grows from 7 to 11 cm tall. Orbicular leaves, about 4-10 per plant, form basal rosettes. The leaves are generally 3–5.5 mm long and 1.5-3.5 mm wide. This species generally has one or two scapes and cymose inflorescences that are 7–11 cm long. Flowers are pale pink or mauve. S. simulans is endemic to the Arnhem Land plateau in the Northern Territory of Australia, but not much more is known about its distribution as it is only known from around its type location. Its reported habitat is in shallow sandy soils on a sandstone plateau. It flowers in the southern hemisphere in June. S. simulans is closely related to S. accedens. Its conservation status has been assessed as data deficient.
Stylidium stenophyllum is a dicotyledonous plant that belongs to the genus Stylidium that was described by A.R. Bean in 2000. It is an erect annual plant that grows from 30 to 40 cm tall. Linear leaves, about 7-25 per plant, are scattered along the stems. The leaves are generally 36–86 mm long and 1.5-2.5 mm wide. This species generally has three to four scapes and cymose inflorescences that are 28–39 cm long. Flowers are white or pink. S. stenophyllum is endemic to the far northeastern Northern Territory of Australia and is only known from the type location. It has only been recorded from one sandstone monolith known as a beehive formation where less than 100 clumps of plants survive at the concentration of about 10 individual plants per clump. For this reason, A.R. Bean suggested a vulnerable conservation status. However it currently appears on neither the IUCN Red List nor the EPBC Act list of threatened flora.
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 fimbriatum is a dicotyledonous plant that belongs to the genus Stylidium. It is an erect annual plant that grows from 15 to 30 cm tall. Oblanceolate leaves, about 16 per plant, form a basal rosette around the compressed stems. The leaves are generally 5–20 mm long and 2–7 mm wide. This species generally has one or two scapes and cymose inflorescences that are 15–30 cm long. Flowers are pink with yellow highlights. S. fimbriatum's distribution is confined to the area around Bachsten Creek in the Kimberley region in Western Australia. Its typical habitat is herbfields that are seasonally wet.
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.
Stylidium inconspicuum is a dicotyledonous plant that belongs to the genus Stylidium. It is an annual plant that grows from 5 to 20 cm tall. Obovate or elliptical leaves, about 5-30 per plant, are scattered along the elongate, glabrous stem. The leaves are generally 4–8 mm long and 2–5 mm wide. Petioles and scapes are absent. Inflorescences are 5–8 cm long and produce pink or red flowers. S. inconspicuum is endemic to Java and is one of the few Stylidium species that are not native to Australia. Its habitat is recorded as being moist areas in grass-dominated fields at an altitude of 20–30 metres.
Stylidium trichopodum is a dicotyledonous plant that belongs to the genus Stylidium. It is an annual plant that grows from 6 to 20 cm tall. The linear leaves, about 20-200 per plant, are scattered along the elongate, glabrous stems. The leaves are generally 3–9 mm long and 0.2-0.7 mm wide. Petioles are absent. This species produces 1-10 scapes per plant. Inflorescences are 2.6–6 cm long and produce a single yellow or orange flower that blooms in June and July in the southern hemisphere. S. trichopodum is endemic to northern Queensland and is only known from a few populations. Its habitat is recorded as being moist sandy soils on flat or gently sloping terrain, sometimes in areas dominated by Melaleuca species. S. trichopodum is most closely related to S. pedunculatum, though it differs by its much larger flower and its cauline leaves instead of terminal rosettes for S. pedunculatum.
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 leptorrhizum is a dicotyledonous plant that belongs to the genus Stylidium. It is an herbaceous annual plant that grows from 8 to 25 cm tall. Oblanceolate or elliptical leaves, about 10-20 per plant, form a basal rosette with stems absent. The leaves are generally 14–60 mm long and 3–9.5 mm wide. This species produces 1-3 scapes per plant. Inflorescences are 8–25 cm long and produce pink or mauve flowers that bloom from May to August in their native range. S. leptorrhizum is endemic to the Kimberley region of Western Australia and the Victoria River district of the Northern Territory. Its typical habitat has been reported as sandy soils along creeks or billabongs. S. leptorrhizum is most closely related to S. multiscapum. When reviewing section Debilia, Anthony Bean reduced the recently described S. barrettorum to synonymy with S. leptorrhizum after examining the type specimen.
Stylidium multiscapum is a dicotyledonous plant that belongs to the genus Stylidium. It is an herbaceous annual plant that grows from 10 to 20 cm tall. Oblanceolate leaves, about 8-100 per plant, form a basal rosette with stems absent.
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.
