Heteropogon

tangleheads
	Heteropogon contortus
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Monocots
(unranked):	Commelinids
Order:	Poales
Family:	Poaceae
Subfamily:	Panicoideae
Tribe:	Andropogoneae
Genus:	Heteropogon; Pers.[1]
Type species
	Heteropogon glaber; (syn of H. contortus); Pers.[2][3]
Synonyms[1][4]
	Spirotheros Raf.;

Heteropogon is a genus of annual and perennial plants in the grass family known generally as tangleheads, widespread primarily in tropical and subtropical regions.[5]

Tangleheads are erect tussock grasses with paired spikelets. Lower pairs are equal in size (homogamous units), and upper pairs include one awned bisexual spikelet and one awnless sterile spikelet (heterogamous units).[6][7][8]

The name of the genus is derived from the Greek words έτερος (éteros), meaning "different," and πώγων (pogon), meaning "beard."[9]

Species[4][10][11]

Heteropogon contortus (L.) P.Beauv. ex Roem. & Schult. - Africa, southern Asia, southwestern Europe (Spain, France, Italy, Switzerland, Balkans), Mesoamerica, West Indies, tropical South America, southern United States (CA AZ NM TX FL HI), various oceanic islands
Heteropogon fischerianus Bor - Tamil Nadu
Heteropogon melanocarpus (Elliott) Benth. - Mesoamerica, West Indies, tropical South America, southern United States (AZ TX AL FL GA NC SC), Africa, Madagascar, Yunnan, India, Oman
Heteropogon polystachyus (Roxb.) Schult. - Tamil Nadu
Heteropogon ritchiei (Hook.f.) Blatt. & McCann - India, Myanmar
Heteropogon triticeus (R.Br.) Stapf ex Craib - Southeast Asia, New Guinea, Queensland, Hainan, India, Sri Lanka

Formerly included[4]

see Agenium Dichanthium Diectomis Diheteropogon Elymandra Hyparrhenia Parahyparrhenia Trachypogon

Heteropogon androphilus - Elymandra androphila
Heteropogon arrhenobasis - Hyparrhenia arrhenobasis
Heteropogon bellariensis - Parahyparrhenia bellariensis
Heteropogon buchneri - Diheteropogon filifolius
Heteropogon concinnus - Dichanthium caricosum
Heteropogon filifolius - Diheteropogon filifolius
Heteropogon grandiflorus - Diheteropogon filifolius
Heteropogon hagerupii - Diheteropogon hagerupii
Heteropogon hirtus - Hyparrhenia hirta
Heteropogon hochstetteri - Diectomis fastigiata
Heteropogon leptocladus - Agenium leptocladum
Heteropogon megapotamicus - Trachypogon spicatus
Heteropogon oliganthus - Dichanthium oliganthum
Heteropogon pubescens - Hyparrhenia hirta
Heteropogon secundus - Trachypogon spicatus
Heteropogon stipoides - Trachypogon spicatus
Heteropogon tenellus - Dichanthium caricosum
Heteropogon tenuiculus - Dichanthium sericeum
Heteropogon truncatus - Trachypogon spicatus
Heteropogon villosus - Agenium villosum

Gallery

Heteropogon sp.
Heteropogon contortus
Heteropogon contortus
Heteropogon triticeus

References

"Genus: Heteropogon Pers". Germplasm Resources Information Network. United States Department of Agriculture. 1999-03-09. Retrieved 2011-02-24.
lectotype designated by Nash, North American Flora 17: 127 (1912)
Tropicos, Heteropogon Pers.
Kew World Checklist of Selected Plant Families
Persoon, Christiaan Hendrik 1807. Synopsis Plantarum 2: 533 in Latin
Jepson Manual Treatment
USDA Plants Profile
Grass Manual Treatment Archived 2011-06-11 at the Wayback Machine
Quattrocchi, Umberto (2006). CRC World Dictionary of Grasses. II E-O. CRC Press. p. 1036. ISBN 978-0-8493-1303-5.
The Plant List search for Heteropogon
"GRIN Species Records of Heteropogon". Germplasm Resources Information Network. United States Department of Agriculture. Archived from the original on 2009-05-08. Retrieved 2011-02-24.

External links

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[GRIN-1] "Genus: Heteropogon Pers". Germplasm Resources Information Network. United States Department of Agriculture. 1999-03-09. Retrieved 2011-02-24.

[2] totype designated by Nash, North American Flora 17: 127 (1912)

[3] Tropicos, Heteropogon Pers.

[u-4] Kew World Checklist of Selected Plant Families

[5] Persoon, Christiaan Hendrik 1807. Synopsis Plantarum 2: 533 in Latin

[6] Jepson Manual Treatment

[7] USDA Plants Profile

[8] Grass Manual Treatment Archived 2011-06-11 at the Wayback Machine

[9] Quattrocchi, Umberto (2006). CRC World Dictionary of Grasses. II E-O. CRC Press. p. 1036. ISBN 978-0-8493-1303-5.

[10] The Plant List search for Heteropogon

[GRINSpecies-11] "GRIN Species Records of Heteropogon". Germplasm Resources Information Network. United States Department of Agriculture. Archived from the original on 2009-05-08. Retrieved 2011-02-24.