''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.

Description

''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 Sessility, or sessile, may refer to: * Sessility (motility), organisms which are not able to move about * Sessility (botany), flowers or leaves that grow directly from the stem or peduncle of a plant * Sessility (medicine), tumors and polyps that ...

or on a short petiole long, and ending with a sharp point. The

inflorescence An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed o ...

is a cluster of 3-10 flowers at the end of branches or in the leaf axils on a

pedicel Pedicle or pedicel may refer to: Human anatomy *Pedicle of vertebral arch, the segment between the transverse process and the vertebral body, and is often used as a radiographic marker and entry point in vertebroplasty and kyphoplasty procedures ...

long, flowers barely longer than the leaves. The peduncle is slender and warty, the

pedicels In botany, a pedicel is a stem that attaches a single flower to the inflorescence. Such inflorescences are described as ''pedicellate''. Description Pedicel refers to a structure connecting a single flower to its inflorescence. In the absenc ...

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.

Taxonomy and naming

''Leionema praetermissum'' was first formally described by Phillipa Alvarez and

Marco Duretto Marco Duretto (born 1964) is a manager and senior research scientist at the Royal Botanic Gardens Sydney in Australia. His primary research interests are systematics and conservation of Rutaceae, Rubiaceae, Orchidaceae, Stylidiaceae and evolut ...

in 2019 and the description was published in the journal '' Telopea''. The

specific epithet In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, bot ...

''(praetermissum)'' is in reference to "this species having been identified as an undescribed taxon for at least three decades before being formally described".

Distribution and habitat

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 The Colo River, a perennial stream that is part of the Hawkesbury-Nepean catchment, is located in the Central Tablelands of New South Wales, Australia. Course The Colo River rises on the Great Dividing Range, northeast of Newnes, formed by the ...

in the

Wollemi National Park The Wollemi National Park () is a protected national park and wilderness area that is located in the northern Blue Mountains and Lower Hunter regions of New South Wales, in eastern Australia. The park, the second largest national park in New S ...

in New South Wales.

References

{{Taxonbar, from=Q89024074 praetermissum Sapindales of Australia Flora of New South Wales Plants described in 2019 Taxa named by Marco Duretto