Leionema praetermissum, is a shrub with warty stems covered in hairs, white flowers with spreading petals, and prominent stamens. It has a restricted distribution in New South Wales.
Leionema praetermissum is a shrub to high with several or few stems emanating from the base. The stems are warty and needle-shaped with occasional white star-shaped hairs. The leaves are smooth, narrow, linear to lance shaped, long, edges slightly rolled under, arranged alternately, sometimes crowded, smooth and sessile or on a short petiole long, and ending with a sharp point. The inflorescence is a cluster of 3-10 flowers at the end of branches or in the leaf axils on a pedicel long, flowers barely longer than the leaves. The peduncle is slender and warty, the pedicels long. The triangular, narrow calyx lobes are smooth on the outside with a stiff apex. The 5 petals are spreading, each petal long, upperside white, underneath pale green, glandular and there are 10 prominent stamens. The fruit is a capsule, long, wide. Flowering occurs from April to July.[1] [2]
Leionema praetermissum was first formally described by Phillipa Alvarez and Marco Duretto in 2019 and the description was published in the journal Telopea.[3] [4] The specific epithet (praetermissum) is in reference to "this species having been identified as an undescribed taxon for at least three decades before being formally described".
This species has a restricted distribution, it grows in wetlands adjacent to water courses in sand, amongst boulders in vegetation thickets along the Colo River in the Wollemi National Park in New South Wales.[3] [2]