Richardia scabra L. (Introduced) (Tropical & Subtropical America: Alabama, Arkansas, Belize, Bolivia, Brazil North, Brazil Northeast, Brazil Southeast, Brazil West-Central, Central American Pac, Colombia, Costa Rica, Cuba, Ecuador, El Salvador, Florida, French Guiana, Georgia, Guatemala, Guyana, Honduras, Jamaica, Louisiana, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Mississippi, Nicaragua, North Carolina, Panamá, Paraguay, Peru, South Carolina, Texas, Venezuela, Virginia; Introduced: Angola, Assam, Bangladesh, Benin, China Southeast, Fiji, Hainan, Hawaii, India, Indiana, Jawa, KwaZulu-Natal, Malawi, Myanmar, Northern Provinces, Philippines, Puerto Rico, South China Sea, Sri Lanka, Taiwan, Tanzania, Uganda, Zambia, Zimbabwe as per POWO)
(Calyx lobes tringular as per Flora of Zimbabwe and POWO)

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BSI Flora of India Checklist Vol. 2 (Distribution):
Richardia brasiliensis Gomes (Assam, Meghalaya)
Richardia scabra L. (Assam, Bihar, Andhra Pradesh, Karnataka, Kerala, Meghalaya, Odisha, Tamil Nadu, West Bengal)


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Flora of Peninsular India:
Richardia brasiliensis (Tamil Nadu)
Richardia scabra


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From Floral Database of Tamilnadu
: 

Binomial Habit Notes Ref. Distrib.
Richardia
brasiliensis
Gomes
Herb Western Ghats
& Eastern Ghats, Naturalized, Native of Tropical America
Flora of Tamil
Nadu, VOL. II, 1987
Coimbatore,
Nilgiri, Salem, Tirunelveli
Richardia scabra L. Herb Western
Ghats,  High Altitude, Naturalized,
Native of Tropical America
Flora
of Tamil Nadu, VOL. II, 1987
Kanniya kumari

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Encyclopaedia of World Medicinal Plants, Volume 1 By T. Pullaiah (2006- Details)-


Richardia (‎Rubiaceae) : 1 post by 1 author.

I have updated eFI (efloraofindia) page on Richardia (Rubiaceae)

Attempts have been made to incorporate most of the species available in India & nearby areas with details & keys directly or through links as far as possible. It’s quite possible that there may be some discrepancy in the accepted names & synonyms taken from other links.

Species discussed so far in efloraofindia are given at the bottom of the page in the form of links against Subpages. On clicking them one can see all the details.

If someone can provide complete list of Indian species with source references it will be wonderful.

Any comments/ corrections are welcome.