Syncarpia

Syncarpia is a small group of trees in the myrtle family (Myrtaceae) described as a genus in 1839.^[3][4][2] They are native to Queensland and New South Wales in Australia.^[1][5]

Turpentine trees
S. glomulifera leaves
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Myrtales
Family:	Myrtaceae
Subfamily:	Myrtoideae
Tribe:	Syncarpieae
Genus:	Syncarpia Ten.
Synonyms[1][2]
Metrosideros sect. Syncarpia (Ten.) Baill. Nani sect. Syncarpia (Ten.) Kuntze Kamptzia Nees

They are unusual among the Myrtaceae in that the leaves are opposite rather than alternate as is the norm for the family.

The species are commonly known as turpentine trees due to the odour of their resin.

Species^[1]

1. Syncarpia glomulifera (Sm.) Nied. in H.G.A.Engler & K.A.E.Prantl - Queensland, New South Wales; naturalized in Hawaii and in parts of Africa
2. Syncarpia hillii F.M.Bailey - Queensland, New South Wales
3. Syncarpia verecunda A.R.Bean - Queensland

S. glomulifera is considered a weed in Hawaii.

Formerly included^[1]

now in Choricarpia Xanthostemon

1. Syncarpia leptopetala - Choricarpia leptopetala
2. Syncarpia subargentea - Choricarpia subargentea
3. Syncarpia vertholenii - Xanthostemon verus