Geniostoma petiolosum

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Geniostoma petiolosum
Scientific classification e
Kingdom: Plantae
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Gentianales
Family: Loganiaceae
Genus: Geniostoma
Species: G. petiolosum
Binomial name
Geniostoma petiolosum
C.Moore & F.Muell. (1869)[1]

Geniostoma petiolosum, commonly known as boar tree, is a flowering plant in the Loganiaceae family. The specific epithet refers to the relatively long and narrow petioles.[1]


It is a shrub or small tree, growing to 5 m in height. The lanceolate-elliptic leaves are 5.5–14 cm long and 2–4.5 cm wide. The inflorescences are clustered, 1–2 cm long, bearing 5–20 small flowers. The ovoid-globose capsules, 6–7 mm long, contain small, black seeds in yellow pulp.[1]

Distribution and habitat[edit]

The plant is endemic to Australia's subtropical Lord Howe Island in the Tasman Sea. It is an uncommon inhabitant of sheltered forest throughout the Island, especially at lower elevations.[1]


  1. ^ a b c d " Geniostoma petiolosum ". Flora of Australia Online: Data derived from Flora of Australia Volume 49 (1994). Australian Biological Resources Study (ABRS). Retrieved 2014-02-11.