Habit and leaf form. Shrubs, or herbs. Herbs annual, or perennial. Leptocaul. Mesophytic. Leaves alternate; spiral; petiolate; non-sheathing; simple. Leaf blades entire; conspicuously asymmetric, or not conspicuously asymmetric; palmately veined. Leaves with stipules. Stipules intrapetiolar; free of one another; caducous. Leaf blade margins crenate, or serrate, or dentate (occasionally with the basal teeth prolonged into long setaceous points). Leaves without a persistent basal meristem. Leaf anatomy. Hairs present (hairs simple, stellate or stellate-dentritic). Stem anatomy. Nodes tri-lacunar. Secondary thickening developing from a conventional cambial ring.
Reproductive type, pollination. Fertile flowers hermaphrodite. Unisexual flowers absent. Plants hermaphrodite.
Inflorescence and flower features. Flowers solitary, or aggregated in ‘inflorescences’. Inflorescence few-flowered, or many-flowered. Flowers in cymes. The terminal inflorescence unit cymose. Inflorescences leaf-opposed (or lateral); umbellate or racemose, shortly pedunculate. Flowers bracteate; regular; 4–5 merous (usually); cyclic, or partially acyclic. Sometimes the androecium acyclic. Floral receptacle developing an androphore (usually, with an inconspicuous glandular patch at the base of each petal, and the apex produced into a fleshy, annular to cup-like disc), or with neither androphore nor gynophore. Free hypanthium absent. Hypogynous disk absent. Perianth with distinct calyx and corolla; 6–10; 2 -whorled; isomerous (usually), or anisomerous. Calyx 4, or 5; 1 -whorled; polysepalous; imbricate; regular; lacking an appendage on the abaxial surface. Sepals sometimes cucullate distally, often apiculate or caudate at apex. Epicalyx present, or absent. Corolla (1–)4–5; 1 -whorled; polypetalous; imbricate, or contorted; regular; yellow. Petals usually shortly clawed, or sessile. Corolla members entire. Androecium 4–100 (i.e. 4 to ‘many’). Androecial members branched; maturing centrifugally; free of the perianth (inserted on an androphore); free of one another. Stamens 4–100 (i.e. 4 to ‘many’); isomerous with the perianth to polystemonous. Filaments glabrous; terete. Anthers dorsifixed; dehiscing via pores, or dehiscing via short slits, or dehiscing via longitudinal slits; bilocular; bisporangiate. Gynoecium 2–10 carpelled. The pistil 1–10 celled. Carpels isomerous with the perianth, or reduced in number relative to the perianth, or increased in number relative to the perianth. Gynoecium syncarpous; eu-syncarpous; superior. Ovary plurilocular; 2–10 locular. Gynoecium stylate. Styles 1; apical; hairless. Stigmas 1; minutely lobed or toothed, fimbriate; dry type; papillate; Group II type. Placentation usually axile. Ovules 2–50 per locule (i.e. 2 to ‘many’); ascending, or pendulous; apotropous; with ventral raphe, or with lateral raphe; arillate, or non-arillate; hemianatropous to anatropous.
Fruit and seed features. Fruit non-fleshy; hairy, or not hairy; not spinose; dehiscent; a capsule (cylindrical or subglobose, sometimes horned, straight, curved or twisted, smooth or verrucose, 2–10-valved, with valves sometimes with transverse septa adaxially). Capsules septicidal, or loculicidal. Fruit numerous-seeded. Seeds endospermic. Endosperm oily. Cotyledons 2. Embryo straight, or bent. Micropyle zigzag. Seedling. Germination phanerocotylar.
Physiology, biochemistry. Aluminium accumulation not found. Photosynthetic pathway: C3.
Geography, cytology, number of species. Native of Australia. Not endemic to Australia. Australian states and territories: Western Australia, Northern Territory, Queensland, and New South Wales. Northern Botanical Province and Eremaean Botanical Province.
FloraBase is produced by the staff of the Western Australian Herbarium, Biodiversity and Conservation Science, Department of Biodiversity, Conservation and Attractions. Publication or other use of content on this site is unauthorised unless that use conforms with the copyright statement.
Western Australian Herbarium (1998–). FloraBase—the Western Australian Flora. Department of Biodiversity, Conservation and Attractions. https://florabase.dpaw.wa.gov.au/