Richardia brasiliensis (Introduced)

Richardia brasiliensis Gomes, Mem. Ipecacuanha Bras. 31 1801. (Syn: Richardia adscendens (DC.) Steud.; Richardia emetica (Mart.) Schult.; Richardia rosea (A.St.-Hil.) Schult.; Richardia rosea f. albiflora Kuntze; Richardia rosea f. lilacina Kuntze; Richardia sericea Walp.; Richardia villosa Sessé & Moc. ex DC.; Richardsonia adscendens DC.; Richardsonia brasiliensis (Gomes) Klotzsch; Richardsonia brasiliensis var. dubia Beauverd & Felipp.; Richardsonia emetica Mart.; Richardsonia rosea A.St.-Hil.; Richardsonia sericea Walp.; Spermacoce adscendens Pav. ex DC. [Invalid]; Spermacoce ascendens Sessé & Moc.; Spermacoce hexandra A.Rich.);
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Ecuador to N. Argentina: Argentina Northeast, Argentina Northwest, Bolivia, Brazil North, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, Ecuador, Kentucky, Paraguay, Peru, Uruguay; Introduced into: Alabama, Assam, Burkina, Cameroon, China Southeast, Cook Is., Florida, Free State, Georgia, Ghana, Guatemala, Hawaii, India, Ivory Coast, Jamaica, Jawa, Kenya, KwaZulu-Natal, Louisiana, Malawi, Mauritius, Mexico Gulf, Mozambique, New Guinea, New Jersey, New South Wales, Nigeria, North Carolina, Northern Provinces, Queensland, South Carolina, Sri Lanka, Taiwan, Tanzania, Texas, Thailand, Uganda, Virginia, Zambia, Zaïre, Zimbabwe as per POWO;

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Richardia brasiliensis is a species of flowering plant in the coffee family known by the English common names tropical Mexican clover,^[1] Brazilian calla-lily, white-eye,^[2] and Brazil pusley.^[3] In Brazil it is known as poaia branca.^[4]
It is native to South America.^[2] It is an introduced species and sometimes an invasive weed in many other places, including Hawaii, Indonesia, Japan, and Thailand.^[5] It is a weed of citrus groves in Florida.^[6]
This plant may be an annual or perennial which grows from a deep root. The branching stems grow up to 40 centimeters long and lie prostrate or grow upright. The oppositely arranged leaves are oval with pointed or rounded tips. They are up to 6.5 centimeters long. The inflorescence is a cluster of up to 20 flowers, or sometimes more.^[3] The petals are white or rose-pink.^[5] The fruit is a hairy nutlet.^[3]
The root is often a home to nematodes.^[3]
In Brazil this plant is used medicinally as an antiemetic and for diabetes.^[4]
(From Wikipedia on 28.10.14)

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References:
POWO  The Plant List Ver.1.1  WCSP  India Biodiversity Portal  Wikipedia