Tropical & Subtropical Old World to N. & NE. Australia: Andaman Is., Angola, Bangladesh, Benin, Botswana, Burkina, Burundi, Cameroon, Cape Verde, Central African Repu, Chad, China South-Central, China Southeast, Christmas I., Comoros, Congo, East Himalaya, Equatorial Guinea, Eritrea, Ethiopia, Gabon, Gambia, Ghana, Guinea, Guinea-Bissau, Gulf of Guinea Is., Hainan, India, Ivory Coast, Jawa, Kenya, KwaZulu-Natal, Laos, Lesser Sunda Is., Liberia, Madagascar, Malawi, Malaya, Mali, Mauritius, Mozambique, Myanmar, Namibia, Nansei-shoto, New Guinea, Niger, Nigeria, Northern Provinces, Northern Territory, Oman, Philippines, Queensland, Réunion, Senegal, Seychelles, Sierra Leone, Solomon Is., Somalia, South China Sea, Sri Lanka, Sudan, Swaziland, Taiwan, Tanzania, Thailand, Togo, Uganda, Vietnam, West Himalaya, Yemen, Zambia, Zaïre, Zimbabwe; Introduced into: Alabama, Argentina Northwest, Arkansas, Bahamas, Belize, Bolivia, Brazil Southeast, Brazil West-Central, Cayman Is., Colombia, Costa Rica, Cuba, Dominican Republic, Ecuador, Florida, French Guiana, Galápagos, Georgia, Guatemala, Haiti, Honduras, Illinois, Indiana, Jamaica, Japan, Leeward Is., Louisiana, Mexico Central, Mexico Gulf, Mexico Southeast, Mexico Southwest, Mississippi, Nicaragua, North Carolina, Panamá, Peru, Puerto Rico, Samoa, Suriname, Texas, Trinidad-Tobago, Windward Is. as per POWO;

grass ID2 from Hooghly 15/9/12 SK2:

Found this grass beside a railway platform, today. Could this be another Hemarthria species?
Species : UNKNOWN
Habit & Habitat : about 4 feet or more tall, a few even more than 5.5 feet; leaves = length more than 45 cm, leaf width 1.7 cm; inflorescence (?) avg. 15 cm.
Date : 15/9/12, 2.15 p.m.
Place : Begampur (Hooghly)

Received an ID suggestion that fits very well with this grass, Rottboellia cochinchinensis (Loureiro) Clayton –

I would like to add some more information relating to the place, Begampur, where i found this grass.

May be Hemarthria compressa De Silva,

I have a previous post of H. compressa at – https://groups.google.com/d/topic/indiantreepix/RS.
This grass looks slightly different. Does
H. compressa has sub species or variants?

Yes. It is Rottboellia cochinchinensis also called Rottboellia exaltata. If you observe the lowest leaf sheaths, you can find stiff hairs, which also may sting or itch when touched. Hence, this is also called Itch grass.


Unknown grass collected from Kamrup district(Metro), Assam : Attachments (10). 4 posts by 3 authors.

Attached images are unknown grass collected from Kamrup district(Metro), Assam. Please Id for it. 
Date : 30.06.2013 & 04.07.2013
Location: Kamrup district (Metro)
Family : Poaceae
Genus & species : Unknown
Habitat: Grows wild on hilly area
Habit : Herb

This may be Rottboellia cochinchinensis (Lour.) Clayton (syn. R. exaltata L. f.)

Yes, …


Need help with grass id : 6 posts by 3 authors. Attachments (7)- around 800 kb each.

Bhopal; black soil; 16/10/2020

Rottboellia cochinchinensis

Yes it is. Also known as R.exaltata



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