Homalanthus populifolius

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Bleeding heart
Omalanthus nutans - senescent leaf.JPG
Bleeding heart – senescent leaf
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malpighiales
Family: Euphorbiaceae
Genus: Homalanthus
Species:
H. populifolius
Binomial name
Homalanthus populifolius
Synonyms
  • Omalanthus populifolius
  • Amalanthus populifolius

Homalanthus populifolius, the bleeding heart, native poplar or Queensland poplar, is an Australian rainforest plant in the family Euphorbiaceae. It often appears in areas of rainforest disturbance. Bleeding heart is highly regarded by rainforest regenerators because of its fast growth and use as a pioneer species in rainforest regeneration.

Contents

Bleeding heart grows from the coastal border of New South Wales and Victoria (36° S), north to Coen, Queensland (13° S) in the tropics. It is also native to Lord Howe Island, Norfolk Island, Papua New Guinea and Solomon Islands, and has been widely planted elsewhere. [1]

It is the host plant for Australia's largest moth, the Hercules moth (Coscinocera hercules).

Description

It is a small tree or shrub, up to 8 meters tall and 15 cm in diameter.

The trunk is cylindrical with greyish-brown bark, fairly smooth but with some bumps and irregularities. Branchlets appear thick, reddish or green. The leaves are triangular, not toothed and alternate, 5 to 15 cm long, and like those of a poplar (giving rise to the species epithet populifolius). The leaves turn red when senescent, hence the common name of bleeding heart.

Flowers are yellow green to red, 2 to 10 cm long. Appearing on racemes mostly in the months of September to December. The fruit matures from December to March, being a two-lobed capsule with an oily yellow aril. The seeds germinate quickly when the warmth of direct sunlight is available. However, as with many pioneer species, the seeds of the bleeding heart have a long dormancy period.

The fruit is eaten by a variety of birds, including brown cuckoo dove, silvereye and Lewin's honeyeater.

Uses

The small size and decorative red leaves make this an attractive garden plant. However, its characteristics as a pioneer species also make it a good invader in disturbed areas. It is regarded as an invasive species in southern Africa, [2] Hawaii [3] and New Zealand. The Sa’dan Toraja people crush the leaves with mud to create a black dye for funeral clothing

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References

  1. 1 2 Botanic Gardens Conservation International (BGCI).; IUCN SSC Global Tree Specialist Group (2019). "Homalanthus populifolius". IUCN Red List of Threatened Species . 2019: e.T144310289A149052426. doi: 10.2305/IUCN.UK.2019-2.RLTS.T144310289A149052426.en . Retrieved 20 November 2021.
  2. FAO report: Status of Invasive Tree Species in Southern Africa
  3. Homalanthus populifolius (Euphorbiaceae): HEAR Species Info