''Aggreflorum longifolium'' is a species of shrub or small tree that is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

to north-western Australia. It has weeping branches, smooth bark, pale green linear leaves, small white flowers and thin-walled fruit.

Description

''Aggreflorum longifolium'' is a shrub or tree that typically grows to a height of and has weeping branches and smooth white, cream-coloured or pink bark. The leaves are arranged alternately,

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 ...

, linear, the same shade of pale green on both sides, long and long. The flower buds are arranged singly in leaf

axil A leaf (: leaves) is a principal appendage of the stem of a vascular plant, usually borne laterally above ground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, stem, fl ...

s surrounded by

bract In botany, a bract is a modified or specialized leaf, associated with a reproductive structure such as a flower, inflorescence axis or cone scale. Bracts are usually different from foliage leaves in size, color, shape or texture. They also lo ...

s that are shed before the flower opens. The flowers are wide 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 ...

about long. The floral cup is long, and the

sepal A sepal () is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom., p. 106 Etymology The term ''sepalum'' ...

s have hairy margins. Flowering occurs from July to October and the fruit is a

glabrous Glabrousness () is the technical term for a lack of hair, down, setae, trichomes, or other such covering. A glabrous surface may be a natural characteristic of all or part of a plant or animal, or be due to loss because of a physical condition, ...

capsule long and wide.

Taxonomy and naming

This species was first formally described in 1920 by

Cyril Tenison White Cyril Tenison White (17 August 1890 – 15 August 1950) was an Australian botanist. Early life White was born in Brisbane, Queensland, to Henry White, a trade broker, and Louisa (''nee'' Bailey). He attended school at South Brisbane State Sch ...

and

William Douglas Francis William Douglas Francis (6 March 1889 – 2 January 1959) was an Australian botanist. Born in Bega, New South Wales, at the age of 17 he moved with his father Alfred and brother Frederick from Wollongong, where he was attending Wollongong Su ...

who gave it the name ''Agonis longifolia'' and published the description in the ''Botany Bulletin, Department of Agriculture, Queensland''. In 2023,

Peter Gordon Wilson Peter may refer to: People * List of people named Peter, a list of people and fictional characters with the given name * Peter (given name) ** Saint Peter (died 60s), apostle of Jesus, leader of the early Christian Church * Peter (surname), a sur ...

changed the name to ''Aggreflorum ellipticum''. In the same journal, Wilson changed the names of 2 subspecies of ''Leptospermum madidum'' to ''Aggreflorum longifolium'' and the names are accepted by

Plants of the World Online Plants of the World Online (POWO) is an online taxonomic database published by the Royal Botanic Gardens, Kew. History Following the Convention on Biological Diversity, the Royal Botanic Gardens in Kew launched Plants of the World Online i ...

: * ''Aggreflorum longifolium'' subsp. ''longifolium'' (previously known as ''Leptospermum madidum'' A.R.Bean subsp. ''madidum'' ) has leaves wide and fruits wide. * ''Aggreflorum longifolium'' subsp. ''sativum'' A.R.Bean has leaves wide and fruits wide.

Distribution and habitat

Subspecies ''longifolium'' is confined to

Cape York Peninsula The Cape York Peninsula is a peninsula located in Far North Queensland, Australia. It is the largest wilderness in northern Australia.Mittermeier, R.E. et al. (2002). Wilderness: Earth's last wild places. Mexico City: Agrupación Sierra Madre, ...

where it grows on the banks of creeks and rivers. Subspecies ''sativum'' is found along watercourses and in sandstone gullies in the

Kimberley Kimberly or Kimberley may refer to: Places and historical events Australia Queensland * Kimberley, Queensland, a coastal locality in the Shire of Douglas South Australia * County of Kimberley, a cadastral unit in South Australia Ta ...

region of Western Australia and the northernmost parts of the Northern Territory.

Conservation status

''Aggreflorum longifolium'' is listed as "not threatened" by the Government of Western Australia

Department of Biodiversity, Conservation and Attractions The Department of Biodiversity, Conservation and Attractions (DBCA) is the Government of Western Australia, Western Australian government department responsible for managing lands and waters described in the ''Conservation and Land Management A ...

, but subsp. ''sativum'' is classified as " Priority Three" meaning that it is poorly known and known from only a few locations but is not under imminent threat.

References

{{Taxonbar, from=Q15368759 longifolium Flora of Queensland Flora of Western Australia Flora of the Northern Territory Plants described in 1992