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Hyparrhenia variabilis and Hyparrhenia cymbaria (Poaceae): New for the Americas, Successful in Mexico

Published online by Cambridge University Press:  20 January 2017

Heike Vibrans ,
Edmundo García-Moya ,
Derek Clayton  and
Jorge G. Sánchez-Ken
Heike Vibrans*
Affiliation:
Postgrado en Botánica, Campus Montecillo, Colegio de Postgraduados, km 36.5 carretera federal México–Texcoco, 56230 Montecillo, Mpio. Texcoco, Estado de México, Mexico
Edmundo García-Moya
Affiliation:
Postgrado en Botánica, Campus Montecillo, Colegio de Postgraduados, km 36.5 carretera federal México–Texcoco, 56230 Montecillo, Mpio. Texcoco, Estado de México, Mexico
Derek Clayton
Affiliation:
The Herbarium, Royal Botanic Gardens, Kew, Richmond, Surrey, United Kingdom
Jorge G. Sánchez-Ken
Affiliation:
03100 México, D.F.
*
Corresponding author's E-mail: heike@colpos.mx, heike_texcoco@yahoo.com.mx
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Abstract

Hyparrhenia cymbaria (boat thatching grass, ipopo grass) and Hyparrhenia variabilis (no common name), robust African savanna grasses with complex taxonomies, have not yet been reported for the Americas. Large populations were found in central Jalisco, northeastern Michoacán, and Morelos, Mexico. The species grow in maize and sorghum fields as well as on roadsides and in old fields, but always in association with present or past sorghum cultivation; this suggests introduction through contaminated seed material from Africa. Because of the size and density of the populations, and their native ecology, they are both agricultural pests as well as a potentially dangerous invaders for the American (sub)tropical grasslands and native scrublands, including the southern United States. The invasion underlines the importance of effective phytosanitary controls of the seed supply.

Keywords

Boat thatching grass, Hyparrhenia cymbaria (L.) StapfHyparrhenia variabilis StapfInvasive grassesinvasive plantsJaliscoMichoacánMorelosphytosanitary controlsnew record
Type
Research Article
Information
Invasive Plant Science and Management , Volume 7 , Issue 2 , June 2014 , pp. 222 - 228
Copyright
Copyright © Weed Science Society of America 

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References

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