Grewioideae

Grewioideae is a subfamily of the family Malvaceae and was first described by Hochreutiner.^[1] The group is named after its type genus, Grewia,^[2] which is named for the English scientist Nehemiah Grew (1641–1712). It contains a number of genera that were previously placed in the defunct family Tiliaceae.

Grewioideae
Crossberry, Grewia occidentalis
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Malvales
Family:	Malvaceae
Subfamily:	Grewioideae Hochr.
Genera
See text

Description

Within the Malvaceae, this subfamily has its inflorescences opposite the leaves, the corollas are usually clawed, and there is a nectar-bearing hair carpet at the base of the petals^[1] and there are numerous dithecal stamens.^[3] The fruit is fleshy or capsular with spines, and the seeds are winged.^[1] The group is thought to have originated about 42 (± 15) million years ago.^[1][4]

Taxonomy

Ulrike Brunken & Alexandra Muellner divide the Grewioideae into two clades, the Grewia clade, Grewieae Endl. and the Apeiba clade, Apeibeae Benth., on the basis of morphological and molecular evidence.^[3]

Tribes and genera

The subfamily includes the following genera - accepted by Bayer & Kubitzki (2003)^[5]

• Apeibeae Benth.
  • Ancistrocarpus Oliv.
  • Apeiba Aubl.
  • Clappertonia Meisn.
  • Corchorus L.
  • Entelea R.Br.
  • Erinocarpus Nimmo ex J.Graham
  • Glyphaea Hook.f.
  • Heliocarpus L.
  • Pseudocorchorus Capuron
  • Sparrmannia L.f.
  • Triumfetta Plum. ex L.
• Grewieae Endl.
  • Colona Cav.
  • Desplatsia Bocq.
  • Duboscia Bocq.
  • Eleutherostylis Burret
  • Goethalsia Pittier
  • Grewia L.
  • Hydrogaster Kuhlm.
  • Luehea Willd.
  • Lueheopsis Burret
  • Microcos Burm. ex L.
  • Mollia Mart.
  • Tetralix Griseb.
  • Trichospermum Blume
  • Vasivaea Baill.