(Subfamily Byttnerioideae), Tribe Lasiopetalae.
Habit and leaf form. Shrubs; evergreen; non-laticiferous and without coloured juice. ‘Normal’ plants. Leaves well developed. Plants with roots; non-succulent. Leaves cauline. To 1 m high. Self supporting. Mesophytic. Not heterophyllous. Leaves small, or medium-sized; alternate; with blades; shortly petiolate. Petioles wingless. Leaves with ‘normal’ orientation; simple; not peltate. Leaf blades neither inverted nor twisted through 90 degrees; dorsiventral; entire; flat; ovate, or oblong, or elliptic; pinnately veined; cross-venulate; obtuse. Mature leaf blades adaxially pubescent (densely stellate hairy); abaxially pubescent (densely stellate hairy). Leaves without stipules. Leaf blade margins entire. Leaf anatomy. Hairs present; complex hairs present. Complex hairs stellate.
Reproductive type, pollination. Fertile flowers hermaphrodite. Unisexual flowers absent. Plants hermaphrodite. Plants homostylous.
Inflorescence and flower features. Flowers aggregated in ‘inflorescences’, or solitary; not crowded at the stem bases. Inflorescence few-flowered. Flowers in racemes. Inflorescences simple; axillary. Flowers pedicellate; bracteate; ebracteolate; small; regular; not resupinate; neither papilionaceous or pseudo-papilionaceous; 5 merous; cyclic; tetracyclic. Floral receptacle with neither androphore nor gynophore. Perianth with distinct calyx and corolla; 10; 2 -whorled; isomerous. Calyx present; 5; 1 -whorled; gamosepalous; lobed. Calyx lobes markedly longer than the tube. Calyx glabrous; exceeding the corolla; regular; neither appendaged nor spurred. Calyx lobes subattenuate. Epicalyx present (of 2 or 3 linear free segments). Corolla present; 5; 1 -whorled. Androecium present. Fertile stamens present. Androecial members definite in number. Androecium 20. Androecial members branched (staminodes in groups of 3 alternating with the stamens); free of the perianth; free of the gynoecium; markedly unequal (stamens short, staminodes in groups of 3, 1 in each group linear, 2 in each group narrow linear); free of one another, or coherent (stamens and staminodes shortly connate at the base into staminal tube); 1 - adelphous; 1 -whorled. Androecium including staminodes. Staminodes 15; non-petaloid. Stamens 5; all more or less similar in shape; isomerous with the perianth; alternisepalous; filantherous. Anthers separate from one another; all alike; bilocular. Fertile gynoecium present. Gynoecium 3 carpelled, or 4 carpelled. The pistil 3 celled, or 4 celled. Carpels reduced in number relative to the perianth. Gynoecium syncarpous; eu-syncarpous; superior. Ovary plurilocular; 3 locular, or 4 locular; sessile (hairy). Gynoecium stylate. Styles 1; simple; apical. Stigmas 1; 1 - lobed. Placentation axile. Ovules several.
Fruit and seed features. Fruit 6–8 mm long; hairy; dehiscent; a capsule. Capsules loculicidal. Fruit 3 celled, or 4 celled. Dispersal unit the seed. Seeds several.
Geography, cytology, number of species. Native of Australia. Endemic to Australia. Australian states and territories: Western Australia, South Australia, Northern Territory, Queensland, and New South Wales. A genus of ca 3 species; 3 species in Western Australia; 0 endemic to Western Australia.
Additional comments. Named after Samuel Hannaford, 1828–1874, an Australian naturalist.
Publication or other use of content on this site is unauthorised unless that use conforms with the copyright statement.