Spermacoce Article

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Spermacoce
Spermacoce ocymoides W IMG 2964.jpg
Spermacoce ocymoides
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Gentianales
Family: Rubiaceae
Subfamily: Rubioideae
Tribe: Spermacoceae
Genus: Spermacoce
Type species
Spermacoce tenuior

Spermacoce or false buttonweed [1] is a genus of flowering plants in the Rubiaceae family. It comprises about 275 species found throughout the tropics and subtropics. [2] Its highest diversity is found in the Americas, followed by Africa, Australia and Asia.

Description

The species are herbs or small shrubs with small- to medium-sized, four-lobed flowers arranged in capitate inflorescences. Some have a brightly coloured calyx and are eye-catching, particularly the Australian species. The corolla is variable in colour, often white, but also all shades of blue, pink and maroon. The fruit is usually a two-seeded capsule, sometimes a schizocarp or nut. [3]

Selected species

Spermacoce is a highly diverse genus with about 275 species in many tropical and subtropical places around the globe. [2] North American species include: [4] [5]

References

  1. ^ "Spermacoce". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 25 November 2015.
  2. ^ a b c d e f g h Kew World Checklist of Selected Plant Families
  3. ^ Davidse, G., M. Sousa Sánchez, S. Knapp & F. Chiang Cabrera. 2012. Rubiaceae a Verbenaceae. 4(2): i–xvi, 1–533. In G. Davidse, M. Sousa Sánchez, S. Knapp & F. Chiang Cabrera (eds.) Flora Mesoamericana. Missouri Botanical Garden Press, St. Louis.
  4. ^ Alftervista Flora of North America
  5. ^ Biota of North America Program

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