Summary
Place of publication:
J. Bot. Res. Inst. Texas 8:17. 2014
Verified:
11/06/2019
ARS Systematic Botanists.
Autonyms (not in current use), synonyms and invalid designations
Reference(s)
- Devanathan, K. & D. Narasimhan. 2018. Hexasepalum teres (Rubiaceae): (Rubiaceae): a potential New World invasive alien weed from Eastern Ghats . Rheedea 28:37-39.
- Fader, A. A. C. et al. 2016. Synopsis of Hexasepalum (Rubiaceae), the priority name for Diodella and a new species from Brazil. Syst. Bot. 41:417. www.aspt.net/systematic-botany
- Kirkbride, J. H., Jr. & P. G. Delprete. 2015. New combinations in Hexasepalum (Rubiaceae: Spermacoceae). J. Bot. Res. Inst. Texas 9:103-106.
- Kirkbride, J. H., Jr. 2014. Hexasepalum teres (Rubiaceae), a new combination. J. Bot. Res. Inst. Texas 8:17-18.
Common names
English
buttonweed – poor-joe – rough buttonweed –
Distribution
| order_code | Status | Continent | Subcontinent | Country | State | Note |
| 1 | Native | Northern America | North-Central U.S.A. | United States | Illinois | |
| 1 | Native | Northern America | North-Central U.S.A. | United States | Iowa | |
| 1 | Native | Northern America | North-Central U.S.A. | United States | Kansas | |
| 1 | Native | Northern America | North-Central U.S.A. | United States | Missouri | |
| 1 | Native | Northern America | North-Central U.S.A. | United States | Oklahoma | |
| 1 | Native | Northern America | North-Central U.S.A. | United States | Wisconsin | |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | Connecticut | |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | Indiana | |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | Massachusetts | |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | Michigan | |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | New Jersey | |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | New York | |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | Ohio | |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | Pennsylvania | |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | Rhode Island | |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | Vermont | |
| 1 | Native | Northern America | Northeastern U.S.A. | United States | West Virginia | |
| 1 | Native | Northern America | Northern Mexico | Mexico | Baja California (Norte) | |
| 1 | Native | Northern America | Northern Mexico | Mexico | Baja California Sur | |
| 1 | Native | Northern America | Northern Mexico | Mexico | Sonora | |
| 1 | Native | Northern America | Northwestern U.S.A. | United States | Colorado | |
| 1 | Native | Northern America | South-Central U.S.A. | United States | New Mexico | |
| 1 | Native | Northern America | South-Central U.S.A. | United States | Texas | |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Alabama | |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Arkansas | |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Delaware | |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | District of Columbia | |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Florida | |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Georgia | |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Kentucky | |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Louisiana | |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Maryland | |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Mississippi | |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | North Carolina | |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | South Carolina | |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Tennessee | |
| 1 | Native | Northern America | Southeastern U.S.A. | United States | Virginia | |
| 1 | Native | Northern America | Southern Mexico | Mexico | Campeche | |
| 1 | Native | Northern America | Southern Mexico | Mexico | Chiapas | |
| 1 | Native | Northern America | Southern Mexico | Mexico | Guanajuato | |
| 1 | Native | Northern America | Southern Mexico | Mexico | Guerrero | |
| 1 | Native | Northern America | Southern Mexico | Mexico | Hidalgo | |
| 1 | Native | Northern America | Southern Mexico | Mexico | Jalisco | |
| 1 | Native | Northern America | Southern Mexico | Mexico | Nayarit | |
| 1 | Native | Northern America | Southern Mexico | Mexico | Oaxaca | |
| 1 | Native | Northern America | Southern Mexico | Mexico | Querétaro | |
| 1 | Native | Northern America | Southern Mexico | Mexico | Veracruz de Ignacio de la Llave | |
| 1 | Native | Northern America | Southwestern U.S.A. | United States | Arizona | |
| 1 | Native | Northern America | Southwestern U.S.A. | United States | California | |
| 1 | Native | Southern America | Brazil | Brazil | | |
| 1 | Native | Southern America | Caribbean | Cuba | | |
| 1 | Native | Southern America | Caribbean | Dominican Republic | | |
| 1 | Native | Southern America | Caribbean | Haiti | | |
| 1 | Native | Southern America | Caribbean | Jamaica | | |
| 1 | Native | Southern America | Central America | Belize | | |
| 1 | Native | Southern America | Central America | Costa Rica | | |
| 1 | Native | Southern America | Central America | El Salvador | | |
| 1 | Native | Southern America | Central America | Guatemala | | |
| 1 | Native | Southern America | Central America | Honduras | | |
| 1 | Native | Southern America | Central America | Nicaragua | | |
| 1 | Native | Southern America | Central America | Panama | | |
| 1 | Native | Southern America | Northern South America | French Guiana | | |
| 1 | Native | Southern America | Northern South America | Guyana | | |
| 1 | Native | Southern America | Northern South America | Suriname | | |
| 1 | Native | Southern America | Northern South America | Venezuela | | |
| 1 | Native | Southern America | Southern South America | Paraguay | | |
| 1 | Native | Southern America | Western South America | Bolivia | | |
| 1 | Native | Southern America | Western South America | Colombia | | |
| 1 | Native | Southern America | Western South America | Ecuador | | |
| 1 | Native | Southern America | Western South America | Peru | | |
| 4 | Naturalized | Africa | Macaronesia | Cabo Verde | | |
| 4 | Naturalized | Africa | South Tropical Africa | Angola | | |
| 4 | Naturalized | Africa | West Tropical Africa | Gambia | | |
| 4 | Naturalized | Africa | West Tropical Africa | Guinea-Bissau | | |
| 4 | Naturalized | Africa | West Tropical Africa | Senegal | | |
| 4 | Naturalized | Africa | Western Indian Ocean | Madagascar | | |
| 4 | Naturalized | Asia-Temperate | China | China | | s.e. |
| 4 | Naturalized | Asia-Temperate | Eastern Asia | Japan | | |
| 4 | Naturalized | Asia-Temperate | Eastern Asia | Korea, South | | |
| 4 | Naturalized | Asia-Tropical | Indian Subcontinent | India | Kerala | |
| 4 | Naturalized | Asia-Tropical | Indian Subcontinent | India | Tamil Nadu | |
| 4 | Naturalized | Asia-Tropical | Indian Subcontinent | Sri Lanka | | |
| 4 | Naturalized | Australasia | Australia | Australia | | |
| 4 | Naturalized | Europe | Middle Europe | Netherlands | | |
Native
Northern America
-
NORTHEASTERN U.S.A.:
United States [Connecticut, Indiana, Massachusetts, Michigan, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia]
-
NORTH-CENTRAL U.S.A.:
United States [Illinois, Iowa, Kansas, Missouri, Oklahoma, Wisconsin]
-
NORTHWESTERN U.S.A.:
United States [Colorado]
-
SOUTHEASTERN U.S.A.:
United States [Alabama, Arkansas, Delaware, District of Columbia, Florida, Georgia, Kentucky, Louisiana, Maryland, Mississippi, North Carolina, South Carolina, Tennessee, Virginia]
-
SOUTH-CENTRAL U.S.A.:
United States [New Mexico, Texas]
-
SOUTHWESTERN U.S.A.:
United States [Arizona, California]
-
NORTHERN MEXICO:
Mexico [Sonora, Baja California (Norte), Baja California Sur]
-
SOUTHERN MEXICO:
Mexico [Campeche, Chiapas, Guanajuato, Guerrero, Hidalgo, Jalisco, Nayarit, Oaxaca, Querétaro, Veracruz de Ignacio de la Llave]
Southern America
-
CARIBBEAN:
Cuba, Dominican Republic, Haiti, Jamaica
-
CENTRAL AMERICA:
Belize, Costa Rica, Guatemala, Honduras, Nicaragua, Panama, El Salvador
-
NORTHERN SOUTH AMERICA:
French Guiana, Guyana, Suriname, Venezuela
-
BRAZIL:
Brazil
-
WESTERN SOUTH AMERICA:
Bolivia, Colombia, Ecuador, Peru
-
SOUTHERN SOUTH AMERICA:
Paraguay
Naturalized
Africa
-
MACARONESIA:
Cabo Verde
-
WEST TROPICAL AFRICA:
Gambia, Guinea-Bissau, Senegal
-
SOUTH TROPICAL AFRICA:
Angola
-
WESTERN INDIAN OCEAN:
Madagascar
Asia-Temperate
-
CHINA:
China (s.e.)
-
EASTERN ASIA:
Japan, Korea, South
Asia-Tropical
-
INDIAN SUBCONTINENT:
India [Kerala, Tamil Nadu], Sri Lanka
Australasia
Europe
-
MIDDLE EUROPE:
Netherlands
Economic Uses
| Usage | Type | Note | Reference |
| Weed | | | Devanathan, K. & D. Narasimhan. 2018. Hexasepalum teres (Rubiaceae): (Rubiaceae): a potential New World invasive alien weed from Eastern Ghats . Rheedea 28:37-39. |
Cite as: USDA, Agricultural Research Service, National Plant Germplasm System.
2025. Germplasm Resources Information Network
(GRIN Taxonomy). National Germplasm Resources Laboratory, Beltsville, Maryland.
URL: https://grip.mawarid.gov.om/gringlobal/taxon/taxonomydetail?id=468381.
Accessed 14 May 2025.