Stackhousieae
A small natural order of herbs, usually forming a perennial stock, with erect, slightly branched, twiggy stems, often assuming a yellowish colour, rarely dwarf and tufted; they are almost endemic in Australia, one species extending to New Zealand, and another to the Philippine Islands. Flowers white or yellow, in terminal spikes, rarely solitary, three-bracted at base; calyx small, five-lobed or five-cleft; petals five, perigynous, with elongated claws, usually free at the base, but united upwards in a tubular corolla, with spreading lobes; stamens five, included in the corolla tube, of very unequal lengths. Leaves alternate, narrow, entire, often somewhat fleshy; stipules none, or when present very minute. The order Stackhousieae is limited to a single genus--Stackhousia--comprising about twenty species.