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Stylidium longissimum is a dicotyledonous plant that belongs to the genus Stylidium (family Stylidiaceae). The specific epithet is from the Latin longissimus, which means "very long" and refers to this species' long capsules that can be up to 15 mm long excluding the sepals. The capsules may be the longest in the genus.
S. longissimum is an annual plant that grows from 16 to 30 cm tall. Elliptical leaves, about 4-14 per plant, are scattered along the elongate, glabrous stem. The leaves are generally 3.5-9.5 mm long and 1.8–5 mm wide. Petioles are nearly absent at 0–0.5 mm long and scapes are completely absent. Inflorescences are 5–20 cm long and produce pink or mauve flowers that bloom in June in the Southern Hemisphere. S. longissimum is endemic to the Cape Melville area of Cape York Peninsula in northern Queensland. The populations of S.
Grass Triggerplant · Stylidium inconspicuum · Stylidium javanicum · Stylidium laricifolium · Stylidium leeuwinense · Stylidium leptorrhizum · Stylidium lobuliflorum · Stylidium longicornu · Stylidium marradongense · Stylidium multiscapum · Stylidium muscicola · Stylidium nominatum
Text excerpted from the Wikipedia article Stylidium longissimum by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
