Para las afecciones de la piel, diuréticas, anticatarrales, calmantes e hipotensor: Hojas y ramas

Leaf:clean the blood, colds, cough, parasites, purge, kidney, leaves squeezed or boiled, juice/tea drunk to rid oneself of worms or parasites

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Whole plant: Decoction as a bath to remedy grippe and headache; liver ailments. In preparations for diarrhoea, dysentery, diabetes, low blood pressure, fractures; seedling is a mild purgative.

Root: Depurative.

Leaf: For a resolutive cataplasm; astringent. Juice for colic, pain of dysentery. Stew of crushed leaves is used against gonorrhoea and to retard perspiration. Infusion for a cholagogue, purgative and antidysenteric. In French Guiana, an infusion is drunk three times daily as an hypotensive; decoction with sodium sulphate is drunk to remedy cutaneous eruptions. Used for treating skins burns and for hypertension in NW Guyana.
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Origin

Cultivated in gardens.

Action:

Febrifuge, anti-inflammatory. In Brazil, the plant is externally used for purulent ulcers and internally for rheumatic inflammations and fever. An infusion of the bark is used against diarrhoea and dysentery.

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Origin

Jamaica

Folk medicinal uses

In Browne's day the plant was '. . . . kept in most of the shops of America where it is much in use among the poorer people'. Its uses were similar to those for which it is em played to-day. A morning drink either alone or with castor oil provides a remedy for colds, 'cleaning the system', and for dysmenorrhoea. In Africa it has similar uses but is also employed for the treatment of gonorrhoea, eye disorders, sores in the ears of children and for heart trouble'. The plant is said to contain glycosidal compounds. A leaf infusion is used in Trinidad as a cooling medicine. 

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Origin

Jamaica

Folk medicinal uses

The use of vervain in the treatment of worms in children dates back to the early periods of Jamaican medicine and continues today. In the time of Barham, Lunan and other early writers it was considered useful as a purgative drink after the administration of worm remedies such as Asclepias or Mucuna or in some cases was itself referred to as vermifuge. Some use is still made of the sweetened juice alone or in combination with other worm remedies such as Annona muricata and Chenopodium. Its use as an emmenagogue is mentioned by

Dancer and other authors. The old use of vervain in the treatment of diarrhoea is paralleled by its use in dysentery and diarrhoea cases among the Brazilian Indians. Sloane recommended its use with "spikenard" in the treatment of dropsies. West Indians of the Panama Canal Zone call the plant "porterweed" and employ it in domestic medicine. Tea made from it is said to foam like porter. In Brazil it appears to have been used to adulterate tea and to have been exported to Europe as "Brazilian tea".

1) Barret, Bruce Economic Botany vol. 48, nro. 1 .-- p. 8-20 1994

2) Robertt, A., et al.. Medicinal Plants of the Guianas (Guyana, Suriname, French Guyana)/Smithsonian NMNH. cited online: 17-08-2017

3) Escalona Cruz, José Luis; et al/ Revista Cubana de Plantas Medicinales vol. 20, no 4. 2015. p -- 429 - 439.

4) Khare, C.P./ Indian Medicinal Plants. -- Nueva Dheli: Springer, 2007 . - p 624.

5) Asprey, G.F; Phylis Thornton/ Medicinal plants of Jamaica. Parts I & II. – p. 29.

6) Asprey, G.F; Phylis Thornton/ Medicinal plants of Jamaica. Parts III & IV. – p. 70.