''Opercularia'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

of perennial and

subshrub A subshrub (Latin ''suffrutex'') or undershrub is either a small shrub (e.g. prostrate shrubs) or a perennial that is largely herbaceous but slightly woody at the base (e.g. garden pink and florist's chrysanthemum). The term is often interch ...

flowering plants in the family

Rubiaceae Rubiaceae () is a family (biology), family of flowering plants, commonly known as the coffee, madder, or bedstraw family. It consists of terrestrial trees, shrubs, lianas, or herbs that are recognizable by simple, opposite leaves with Petiole ( ...

. There are about 15 species, all of which are endemic to Australia. Many of the species have an unpleasant odour. Species include: *'' Opercularia acolytantha'' *'' Opercularia apiciflora'' *'' Opercularia aspera'' – coarse stinkweed *'' Opercularia diphylla'' *'' Opercularia echinocephala'' – bristly-headed stinkweed *'' Opercularia hirsuta'' – silky-haired stinkweed *'' Opercularia hispidula'' – hairy stinkweed, hispid stinkweed *'' Opercularia liberiflora'' *'' Opercularia ovata'' *'' Opercularia rubioides'' *'' Opercularia scabrida'' *'' Opercularia spermacocea'' *'' Opercularia vaginata'' – dog weed *'' Opercularia varia'' – variable stinkweed *'' Opercularia volubilis'' – twining stinkweed

References

Rubiaceae genera {{Rubioideae-stub