Spermacoce
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| Spermacoce ocymoides | |
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Spermacoce
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| Spermacoce tenuior |
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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]
- 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[2]
- 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[2]
- 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 [2]
- 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[2]
- 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 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[2]
- 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[2]
- 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
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 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
- Spermacoce in West African plants – A Photo Guide.
Gallery
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Spermacoce articularis (S hispida- Madanghanti) in Hyderabad, AP W2 IMG 9064.jpg
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Spermacoce terminalis.jpg
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Spermacoce ocymoides W IMG 2966.jpg
Spermacoce ocymoides at Ananthagiri Hills, in Rangareddy district of Andhra Pradesh, India.
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Spermacoce pusilla (Tiny False Buttonweed) in Hyderabad, AP W IMG 0005.jpg
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