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This genus is accepted, and its native range is Tropical & Subtropical Old World to Central Asia.
A specimen from Kew's Herbarium

[FZ]

Gramineae, T. A. Cope. Flora Zambesiaca 10:4. 2002

Morphology General Habit
Slender annuals; culms geniculate, often trailing and rooting at the decumbent nodes; internodes pilose.
Morphology Leaves Leaf sheaths
Leaf sheaths slightly inflated; ligule membranous; leaf laminas slightly cordate and semi-amplexicaul at the base, pilose with bulbous-based hairs at least below, usually becoming ciliate.
Morphology Reproductive morphology Inflorescences
Racemes in subdigitate groups, slender, ± exserted from the spatheoles; peduncles longer or shorter than the racemes, erect at maturity; internodes and pedicels delicate, filiform, long-ciliate on both margins.
Morphology Reproductive morphology Inflorescences Spikelets
Sessile spikelet laterally compressed, with silvery-white appressed hairs at the base, the callus short, truncate; inferior glume chartaceous to coriaceous, rounded on the back, with or without lateral keels; inferior floret reduced to a hyaline lemma; superior floret fertile; fertile lemma bifid almost to the base and with a glabrous, geniculate sub-basal awn; anthers 2.Pedicelled spikelet absent or much reduced.

[FTEA]

Gramineae, W. D. Clayton, S. M. Phillips And S. A. Renvoize. Flora of Tropical East Africa. 1974

Morphology General Habit
Annuals or perennials with slender, often trailing, culms
Morphology Leaves
Leaf-blades broad, commonly lanceolate, cordate and amplexicaul at the base; ligule membranous
Morphology Reproductive morphology Inflorescences
Inflorescence composed of slender subdigitate racemes, their internodes filiform to linear
Sessile
Sessile spikelet laterally compressed; callus truncate; lower glume chartaceous to coriaceous, rounded on the back, with or without lateral keels, often scabrid or muricate; lower floret reduced to a hyaline lemma; upper floret with hyaline subentire lemma bearing a glabrous geniculate awn from low down on the back
Morphology Reproductive morphology Fruits
Caryopsis terete
Morphology Reproductive morphology Inflorescences Spikelets
Pedicelled spikelet variable, from as large as the sessile to quite suppressed. Sessile spikelet laterally compressed; callus truncate; lower glume chartaceous to coriaceous, rounded on the back, with or without lateral keels, often scabrid or muricate; lower floret reduced to a hyaline lemma; upper floret with hyaline subentire lemma bearing a glabrous geniculate awn from low down on the back
Pedicelled
Pedicelled spikelet variable, from as large as the sessile to quite suppressed.

[FSOM]

M. Thulin et al. Flora of Somalia Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Morphology General Habit
Annual or perennial with slender often trailing stems; leaves broad, usually lanceolate, cordate and amplexicaul at the base; ligule membranous
Morphology Reproductive morphology Inflorescences
Inflorescence composed of slender subdigitate racemes, these terminal and axillary but not spathate, their internodes filiform to linear
Morphology Reproductive morphology Inflorescences Spikelets
Sessile spikelet dorsally or laterally compressed; callus truncate; lower glume membranous to coriaceous, usually rounded on the back, with or without lateral keels, often scabrid or muricate; lower floret reduced to a hyaline lemma; upper floret with hyaline subentire lemma bearing a glabrous geniculate awn from low down on the back; caryopsis terete Pedicelled spikelet variable, from as large as the sessile to quite suppressed.
Distribution
Some 22 species in the Old World tropics, mainly in India.

[GB]

nonem

Morphology General Habit
Annual (20), or perennial (3). Rhizomes absent (22), or short (1). Stolons absent (22), or present (1). Culms erect (2/22), or geniculately ascending (4/22), or decumbent (7/22), or rambling (13/22); slender (6/8), or weak (2/8); 5-41.5-200 cm long; firm (22), or wiry (1); rooting from lower nodes (9/9). Lateral branches lacking (1/5), or sparse (2/5), or ample (3/5). Ligule an eciliate membrane (3), or a ciliolate membrane (17), or a ciliate membrane (2), or a fringe of hairs (1). Leaf-blades lanceolate (22), or ovate (15); firm (17), or flaccid (6).
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes single (4), or paired (10), or digitate (20), or borne along a central axis (1). Rhachis fragile at the nodes; angular (1/1). Rhachis internodes filiform (13), or linear (12). Spikelets solitary (2), or in pairs (21). Fertile spikelets sessile; 1 in the cluster (21/21). Companion sterile spikelets pedicelled (21/21); 1 in the cluster (21/21). Pedicels filiform (12/22), or linear (9/22), or reduced to a stump (1/22).
Morphology Reproductive morphology Inflorescences Spikelets
Companion sterile spikelets absent (2), or represented by barren pedicels (11), or represented by single glumes (2), or well-developed (9). Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets linear (2), or lanceolate (20), or elliptic (2), or ovate (1); laterally compressed (20), or subterete (1), or dorsally compressed (2); 0.8-5.191-10 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus brief (22), or square (1); glabrous (7/16), or pubescent (9/16), or pilose (1/16), or bearded (1/16); base truncate (19/21), or obtuse (2/21); attached transversely.
Sterile
Companion sterile spikelets absent (2), or represented by barren pedicels (11), or represented by single glumes (2), or well-developed (9).
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets linear (2), or lanceolate (20), or elliptic (2), or ovate (1); laterally compressed (20), or subterete (1), or dorsally compressed (2); 0.8-5.191-10 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus brief (22), or square (1); glabrous (7/16), or pubescent (9/16), or pilose (1/16), or bearded (1/16); base truncate (19/21), or obtuse (2/21); attached transversely.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate (22), or elliptic (1), or ovate (1); chartaceous (20), or coriaceous (3); without keels (17), or 2-keeled (6); 2-4 -veined (1/17), or 5 -veined (4/17), or 6 -veined (3/17), or 7 -veined (11/17), or 8 -veined (3/17), or 9 -veined (6/17), or 10-11 -veined (1/17). Lower glume lateral veins obscure (2), or distinct (21); intercarinal veins distinct (1/1). Lower glume surface convex (22), or flat (1); smooth (5), or asperulous (2), or scabrous (10), or spinose (7), or muricate (2); glabrous (21), or pubescent (1), or pilose (1), or villous (1). Lower glume apex entire (22), or dentate (1); 2 -fid (1/1); obtuse (1/10), or acute (7/10), or acuminate (1/10), or attenuate (1/10). Upper glume lanceolate; membranous (3), or chartaceous (20); with undifferentiated margins (22), or hyaline margins (1); 1-keeled; 3 -veined (15/16), or 4-5 -veined (2/16), or 7 -veined (1/16). Upper glume primary vein eciliate (21), or ciliolate (1), or ciliate (1). Upper glume surface smooth (20), or scabrous (3); glabrous (21), or pilose (2). Upper glume apex obtuse (1/22), or acute (21/22), or setaceously attenuate (1/22); muticous (22), or awned (1); 1 -awned (1/1).
Morphology Reproductive morphology Flowers Florets
Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate (6), or oblong (17); hyaline; 0 -veined (10/18), or 2 -veined (8/18), or 3 -veined (1/18); obtuse (10/10). Fertile lemma linear (1), or lanceolate (17), or oblong (4), or ovate (1); hyaline; without keel; 0 -veined (1/22), or 1 -veined (20/22), or 2 -veined (1/22). Lemma apex entire (16), or dentate (3), or lobed (5); 2 -fid (8/8); acute (18/18); muticous (2), or awned (22); 1 -awned (22/22). Principal lemma awn dorsal (22/22); geniculate (22/22). Palea present (2), or absent or minute (21). Palea surface glabrous (1/2), or pubescent (1/2).
Morphology Reproductive morphology Flowers
Anthers 2-3 (12).
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp (18/18); linear (2/5), or fusiform (1/5), or ellipsoid (1/5), or oblong (2/5); isodiametric (1/1).
Distribution
Africa (6), or Temperate Asia (14), or Tropical Asia (19), or Australasia (2), or Pacific (1), or North America (1), or South America (1).

Native to:

Afghanistan, Assam, Bangladesh, Burundi, Cambodia, Cameroon, Cape Verde, Chad, China North-Central, China South-Central, China Southeast, Comoros, Djibouti, East Himalaya, Eritrea, Ethiopia, Ghana, Guinea, Gulf of Guinea Is., Hainan, India, Inner Mongolia, Iran, Japan, Jawa, Kazakhstan, Kenya, Kirgizstan, Korea, Laos, Lesser Sunda Is., Madagascar, Malawi, Malaya, Mali, Manchuria, Mauritius, Mozambique, Myanmar, Nansei-shoto, Nepal, New Guinea, New South Wales, Nigeria, North Caucasus, Northern Provinces, Ogasawara-shoto, Oman, Pakistan, Philippines, Queensland, Rwanda, Saudi Arabia, Senegal, Sierra Leone, Socotra, Somalia, Sri Lanka, Sudan, Sulawesi, Sumatera, Tadzhikistan, Taiwan, Tanzania, Thailand, Tibet, Transcaucasus, Turkey, Uganda, Uzbekistan, Vietnam, West Himalaya, Xinjiang, Yemen, Zambia, Zaïre, Zimbabwe

Introduced into:

Alabama, Amur, Arkansas, Costa Rica, Delaware, District of Columbia, El Salvador, Florida, Georgia, Great Britain, Guatemala, Hawaii, Honduras, Illinois, Indiana, Jamaica, Kansas, Kentucky, Khabarovsk, Leeward Is., Louisiana, Maryland, Massachusetts, Mexico Southeast, Mexico Southwest, Mississippi, Missouri, New Jersey, New York, Nicaragua, North Carolina, Ohio, Oklahoma, Oregon, Pennsylvania, Primorye, Puerto Rico, South Carolina, Tennessee, Texas, Venezuela, Virginia, West Virginia

Arthraxon P.Beauv. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
s.coll. [Cat. no. 8833] K001128314
Gomez, W. [Cat. no. 8835], Myanmar K001128319
Wallich, N. [Cat. no. 8834], Myanmar K001128318
Wallich, N. [Cat. no. 8833], Myanmar K001128317
Wallich, N. [Cat. no. 8833], Nepal K001128316
Wallich, N. [Cat. no. 8836], Nepal K001128322
De Silva, F. [Cat. no. 8837] K001128323
s.coll. [Cat. no. 8833] K001128315
Gomez, W. [Cat. no. 8835], Myanmar K001128320
Gomez, W. [Cat. no. 8835], Myanmar K001128321
Wallich, N. [Cat. no. 8838], Nepal K001128324
Wallich, N. [Cat. no. 8831], Nepal Batratherum K001132265
Wallich, N. [Cat. no. 8832], Nepal Batratherum K001128313
s.coll. [Cat. no. 8827] Batratherum K001128307
Wallich, N. [Cat. no. 8828], Nepal Batratherum K001128309
Wallich, N. [Cat. no. 8831], Nepal Batratherum K001128312
s.coll. [Cat. no. 8828], India Batratherum K001128308
Wallich, N. [Cat. no. 8830], Nepal Batratherum K001128311

First published in Ess. Agrostogr.: 111 (1812)

Accepted by

  • Govaerts, R.H.A. (2011). World checklist of selected plant families published update Facilitated by the Trustees of the Royal Botanic Gardens, Kew.

Literature

Flora of West Tropical Africa

  • Ess. Agrost. III, t. 11, f. 6 (1812)
  • F.T.A. 9: 162 (1917).

Flora Zambesiaca

  • Ess. Agrostogr.: 111, fig.11/6 (1812).
  • Roberty in Boissiera 9: 293–296 (1960).
  • in Rheedea 3: 101 (1993).
  • van Welzen in Blumea 27: 255–300 (1981)

Flora of Somalia

  • Flora Somalia, Vol 4, (1995) Author: by T. A. Cope [updated by M. Thulin 2008]

Flora of Tropical East Africa

  • Ess. Agrost.: 111, fig. 11/6 (1812)

Flora Zambesiaca
Flora Zambesiaca
http://creativecommons.org/licenses/by-nc-sa/3.0

Flora of Somalia
Flora of Somalia
http://creativecommons.org/licenses/by-nc-sa/3.0

Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

GrassBase - The Online World Grass Flora
http://creativecommons.org/licenses/by-nc-sa/3.0

Herbarium Catalogue Specimens
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0