Biology:Spermacoce
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Short description: Genus of plants
| Spermacoce | |
|---|---|
| |
| Spermacoce ocymoides | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Gentianales |
| Family: | Rubiaceae |
| Subfamily: | Rubioideae |
| Tribe: | Spermacoceae |
| Genus: | Spermacoce L. |
| Type species | |
| Spermacoce tenuior | |
| Synonyms[1] | |
| |
Spermacoce or false buttonweed[2] is a genus of flowering plants in the family Rubiaceae. It comprises about 275 species found throughout the tropics and subtropics.[3] 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.[4]
Selected species
Spermacoce is a highly diverse genus with about 275 species in many tropical and subtropical places around the globe.[3] North American species include:[5][6]
- Spermacoce alata Aubl. - West Indies, most of Latin America; naturalized in Africa, India , China , Southeast Asia, Australia , Melanesia
- Spermacoce assurgens Ruiz & Pav. - synonym of Spermacoce remota[3]
- Spermacoce brachysepala (Urb.) Alain in H.A.Liogier & L.F.Martorell - West Indian false buttonweed - Puerto Rico, Haiti, Dominican Republic
- Spermacoce capitata Ruiz & Pav. - baldhead false buttonweed - Central and South America from Belize to Argentina
- Spermacoce confusa Rendle - river false buttonweed - Florida, West Indies, Latin America from Mexico to Argentina
- Spermacoce densiflora (DC.) Alain - bouquet false buttonweed - Florida, West Indies, Latin America from Mexico to Argentina
- Spermacoce ernestii Fosberg & Powell - synonym of Spermacoce ovalifolia[3]
- Spermacoce eryngioides (Cham. & Schltdl.) Kuntze - whorled-leaf false buttonweed - West Indies including Puerto Rico; southeastern South America from Bolivia and Brazil to Argentina
- Spermacoce exilis (L.O. Williams) C. Adams - Pacific false buttonweed - Latin America from Mexico to Argentina , plus West Indies; naturalized in Africa, China , India , southeast Asia and some tropical oceanic islands
- Spermacoce floridana Urb. - synonym of Spermacoce keyensis [3]
- Spermacoce glabra Michx. - smooth false buttonweed - southern and eastern United States (mostly in the Lower Mississippi Valley); also South America
- Spermacoce keyensis Urb. - Florida false buttonweed - southern Florida, Bahamas, southern tip of Texas (Cameron County)
- Spermacoce latifolia Aubl. - synonym of Spermacoce alata[3]
- Spermacoce neoterminalis Govaerts - Everglades false buttonweed- southern Florida
- Spermacoce ovalifolia (M. Martens & Galeotti) Hemsl. - broadleaf false buttonweed - West Indies including Puerto Rico, Latin America from Mexico to Paraguay
- Spermacoce ocymoides Burm.f.
- Spermacoce prostrata Aubl. - prostrate false buttonweed - Florida, Mississippi, Alabama, West Indies including Puerto Rico; most of Latin America; naturalized in China , Vietnam, Sri Lanka and Java
- Spermacoce remota - Lam. - woodland false buttonweed - Florida, Georgia, Texas , Alabama, West Indies, much of Latin America; naturalized in Southeast Asia, China , India , New Guinea, Mauritius and many oceanic islands (including Hawaii)
- Spermacoce sintenisii (Urb.) Alain - synonym of Spermacoce brachysepala[3]
- Spermacoce tenuior L. - slender false buttonweed - Texas , Louisiana, Georgia, West Indies; Latin America from Mexico to Bolivia; naturalized in Tanzania, Java, Sulawesi and Galápagos
- Spermacoce terminalis (Small) Kartesz & Gandhi - synonym of Spermacoce neoterminalis[3]
- Spermacoce tetraquetra A. Rich. - pineland false buttonweed - Florida, West Indies, Mexico, Central America
- Spermacoce verticillata L. - shrubby false buttonweed - Florida, West Indies, most of Latin America; naturalized in Africa, Australia , assorted oceanic islands
References
- ↑ "Spermacoce L..". Plants of the World Online. Royal Botanic Gardens, Kew. http://www.plantsoftheworldonline.org/taxon/urn:lsid:ipni.org:names:326325-2.
- ↑ "Spermacoce". Natural Resources Conservation Service PLANTS Database. USDA. https://plants.usda.gov/core/profile?symbol=SPERM. Retrieved 25 November 2015.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 Kew World Checklist of Selected Plant Families
- ↑ 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.
- ↑ Alftervista Flora of North America
- ↑ Biota of North America Program
External links
- World Checklist of Rubiaceae
- The Spermacoce of Australia
- Flora of China, v 19 p 325, 丰花草属 feng hua cao shu, Spermacoce
Gallery
Spermacoce articularis in Hyderabad, India
Spermacoce terminalis
Spermacoce ocymoides at Ananthagiri Hills, in Rangareddy district of Andhra Pradesh, India .
Spermacoce pusilla in Hyderabad, India.
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Wikidata ☰ Q3314456 entry
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