Diodia

Diodia (or buttonweed) is a genus of flowering plants in the family Rubiaceae. It was described by Carl Linnaeus in 1753. The genus is found from southern and eastern United States, South America, Central America, Mexico, the West Indies and tropical Africa.[2][3]

Buttonweed
Diodia virginiana
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Gentianales
Family: Rubiaceae
Subfamily: Rubioideae
Tribe: Spermacoceae
Genus: Diodia
L.
Type species
Diodia virginiana
Synonyms[1]

Other buttonweeds

Many species of Diodia have been transferred to a closely related genus Diodella, and therefore the name buttonweed also applies to these species. There are also many species of false buttonweeds in the related genus Spermacoce. Abutilon theophrasti in the family Malvaceae is also known by the common name of buttonweed.

Species
  • Diodia aulacosperma K.Schum. - Socotra, Somalia, Kenya, Tanzania
  • Diodia barbata (Poir.) DC. - Guyana, Dominican Republic
  • Diodia barbigera Hook. & Arn. - Mexico
  • Diodia discolor DC. - French Guiana
  • Diodia domingensis DC. - Dominican Republic
  • Diodia flavescens Hiern - Angola, Zambia
  • Diodia incana Aresch. - Ecuador
  • Diodia kuntzei K.Schum. - Venezuela, Bolivia, Peru, Brazil, Argentina, Paraguay
  • Diodia macrophylla K.Schum. - Brazil, Paraguay
  • Diodia microcarpa K.Schum. - Brazil
  • Diodia mitens Bello - Puerto Rico
  • Diodia othonii Rizzini - Brazil
  • Diodia paludosa Kuntze - Paraguay
  • Diodia perforata Urb. - Haiti
  • Diodia rubricosa Hiern - Ghana, Ivory Coast, Liberia, Nigeria, Sierra Leone
  • Diodia saponariifolia (Cham. & Schltdl.) K.Schum.
  • Diodia saponarioides C.Presl - Mexico, Brazil, Argentina, Paraguay
  • Diodia simplex Sw. - Cuba, Jamaica
  • Diodia spicata Miq. - Panama, Colombia, Venezuela, Guyana, French Guinea, Brazil
  • Diodia vaginalis Benth. - Benin, Ghana, Ivory Coast, Liberia, Nigeria, Sierra Leone, Togo, Cameroon, Gabon, Congo-Brazzaville
  • Diodia verticillata Vahl - Brazil, Lesser Antilles
  • Diodia virginiana L. - Virginia buttonweed - south-central and south-eastern United States from Texas to Kansas, east to Florida and New Jersey; also Connecticut, Cuba and Nicaragua. Naturalized in Japan, Taiwan and northern California

References
  1. Kew World Checklist of Selected Plant Families
  2. "Diodia in the World Checklist of Rubiaceae". Retrieved 22 June 2012.
  3. USDA Plants Database


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