1. Family: Poaceae Barnhart
    1. Genus: Digitaria Haller
      1. Digitaria radicosa (J.Presl) Miq.

        This species is accepted, and its native range is Tropical & Subtropical Asia to Pacific.

    [GB]
    Habit
    Annual. Culms rambling; slender; 20-40 cm long. Ligule an eciliate membrane. Leaf-blades lanceolate; 2-7 cm long; 2-5 mm wide.
    Inflorescences
    Inflorescence composed of racemes. Racemes 2-4; digitate; unilateral; 3-9 cm long. Rhachis narrowly winged; angular; smooth on margins. Spikelet packing 0.5 their length apart. Spikelets in pairs. Fertile spikelets pedicelled; 2 in the cluster. Pedicels unequal.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 2.5-3 mm long; falling entire.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 2.5-3 mm long; falling entire.
    Glume
    Glumes two; dissimilar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.1-0.2 mm long; 0.05-0.1 length of spikelet; hyaline; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume apex obtuse. Upper glume lanceolate; 0.33-0.5 length of spikelet; membranous; without keels; 3 -veined. Upper glume surface pubescent. Upper glume apex acute.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret elliptic; 1 length of spikelet; membranous; 5(-7) -veined; with unevenly spaced veins (laterals contiguous); pubescent; eciliate on margins, or ciliate on margins; acute. Fertile lemma lanceolate; 2.5-3 mm long; cartilaginous; much thinner on margins; yellow, or light brown; without keel. Lemma margins flat; covering most of palea. Lemma apex acute. Palea cartilaginous.
    Distribution
    Africa: west-central tropical, east tropical, and western Indian ocean. Asia-temperate: China and eastern Asia. Asia-tropical: India, Indo-China, Malesia, and Papuasia. Australasia: Australia. Pacific: southwestern, south-central, northwestern, and north-central.
    Reference
    Paniceae. FTEA.
    [FTEA]

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

    Habit
    Trailing annual; culms 20–40 cm. long, very slender.
    Leaves
    Leaf-blades narrowly lanceolate, 2–7 cm. long, 2–5 mm. wide.
    Inflorescences
    Inflorescence digitate, of 2–4 racemes; racemes 3–9 cm. long, the spikelets binate and loosely overlapping by about 1/2 their length on a narrowly winged triquetrous rhachis with almost smooth edges.
    Spikelets
    Spikelets narrowly lanceolate, 2.5–3 mm. long; lower glume an inconspicuous ovate scale up to 0.2 mm. long; upper glume 1/3–2/3 as long as the spikelet, 3-nerved; lower lemma as long as the spikelet, 5(–7)-nerved, with a wide central interspace and the lateral nerves so close together that the lemma is apparently 3-nerved, appressed or silky pubescent, very rarely with a ciliate fringe, never with bristles; fruit narrowly lanceolate, yellowish or pale brown.
    Habitat
    Shady places along paths and roadsides; probably introduced; 700 m.
    Distribution
    T3 Mauritius and Seychelles, through tropical Asia, to the Pacific Is.introduced in a few other places
    [FWTA]

    Gramineae, W. D. Clayton. Flora of West Tropical Africa 3:2. 1972

    Habit
    Slender creeping annual about 23 cm. high
    Note
    Probably introduced.

    Images

    Distribution

    Native to:

    Andaman Is., Assam, Bangladesh, Borneo, Caroline Is., China South-Central, China Southeast, Christmas I., Cook Is., East Himalaya, Fiji, Gilbert Is., Hainan, India, Japan, Jawa, Kazan-retto, Korea, Laos, Lesser Sunda Is., Malaya, Maluku, Marianas, Marquesas, Marshall Is., Myanmar, Nansei-shoto, Nauru, Nepal, New Caledonia, New Guinea, Ogasawara-shoto, Pakistan, Philippines, Queensland, Samoa, Society Is., Solomon Is., South China Sea, Sri Lanka, Sulawesi, Sumatera, Taiwan, Thailand, Tonga, Vanuatu, Vietnam, Wallis-Futuna Is., West Himalaya

    Introduced into:

    Aldabra, Cameroon, Canary Is., Hawaii, Madagascar, Mauritius, Rodrigues, Réunion, Seychelles, Tanzania, Venezuela

    Digitaria radicosa (J.Presl) Miq. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jan 1, 1970 Maitland, T.D. [2], Cameroon K000022924
    Jan 1, 1970 Maitland, T.D. [2], Cameroon K000022925
    Henry, A. [1941], Taiwan K000885982 Unknown type material
    Henry, A. [1941], Taiwan K000885983 Unknown type material
    Laegaard, S. [21779], Thailand K000688348
    Maingay, A.C. [554], China K000885984 syntype
    Sep 1, 1970 Kerr, A.F.G. [847], Thailand Digitaria timorensis K000621171
    Sep 1, 1970 Kerr, A.F.G. [3981], Thailand Digitaria timorensis K000621172
    Sep 1, 1970 Kerr, A.F.G. [20593], Thailand Digitaria timorensis K000621175
    Apr 1, 1970 Kerr, A.F.G. [4482], Thailand Digitaria timorensis K000621173
    Apr 1, 1970 Kerr, A.F.G. [6961], Thailand Digitaria timorensis K000621174

    First published in Fl. Ned. Ind. 3: 437 (1857)

    Accepted by

    • Bosser, J. & Renvoize, S.A. (2018). Flore des Mascareignes 203: 1-276. IRD Éditions, MSIRI, RBG-Kew, Paris.
    • Verloove, F. (2017). New xenophytes from the Canary islands (Gran Canaria and Tenerife; Spain) Acta Botanica Croatica 76: 120-131.
    • Boonsuk, B., Chantaranothai, P. & Hodkinson, T.R. (2016). A taxonomic revision of the genus Digitaria (Panicoideae: Poaceae) in mainland Southeast Asia Phytotaxa 246: 248-280.
    • Chang, C.S., Kim, H. & Chang, K.S. (2014). Provisional checklist of vascular plants for the Korea peninsula flora (KPF): 1-660. DESIGNPOST.
    • Onana, J.M. (2011). The vascular plants of Cameroon a taxonomic checklist with IUCN assessments: 1-195. National herbarium of Cameroon, Yaoundé.
    • Clayton, W.D. & Snow, N. (2010). A key to Pacific Grasses: 1-107. Kew Publishing, Royal Botanic Gardens, Kew.
    • Kandwal, M.K. & Gupta, B.K. (2009). An update on grass flora of Uttarkhand Indian Journal of Forestry 32: 657-668.
    • Ahmed, Z.U. (ed.) (2008). Encyclopedia of Flora and Fauna of Bangladesh 12: 1-505. Asiatic Society of Bangladesh.
    • Newman, M., Ketphanh, S., Svengsuksa, B., Thomas, P., Sengdala, K., Lamxay, V. & Armstrong, K. (2007). A checklist of the vascular plants of Lao PDR: 1-394. Royal Botanic Gardens, Edinburgh.
    • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Kress, W.J., DeFilipps, R.A., Farr, E. & Kyi, D.Y.Y. (2003). A Checklist of the Trees, Shrubs, Herbs and Climbers of Myanmar Contributions from the United States National Herbarium 45: 1-590.
    • Flora of North America Editorial Committee (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.
    • Noltie, H.J. (2000). Flora of Bhutan 3(2): 457-883. Royal Botanic Gardens, Edinburgh.
    • Press, J.R. et al. (2000). Annotated Checklist of the Flowering Plants of Nepal: i-x, 1-430. Natural History Museum, London.
    • Lee, W.T. (1996). Lineamenta Florae Koreae: 1-1688. Soul T'ukpyolsi: Ak'ademi Sojok.
    • Turner, I.M. (1995 publ. 1997). A catalogue of the Vascular Plants of Malaya Gardens' Bulletin Singapore 47(2): 347-655.
    • George, A.S., Orchard, A.E. & Hewson, H.J. (eds.) (1993). Oceanic islands 2 Flora of Australia 50: 1-606. Australian Government Publishing Service, Canberra.
    • Karthikeyan, S., Jain, S.K., Nayar, M.P. & Sanjappa, M. (1989). Florae Indicae Enumeratio: Monocotyledonae: 1-435. Botanical Survey of India, Calcutta.
    • Robertson, S.A. (1989). Flowering Plants of Seychelles: 1-327. Royal Botanic Gardens, Kew.
    • Morat, P. & Veillon, J.-M. (1985). Contributions à la conaissance de la végétation et de la flore de Wallis et Futuna Bulletin du Muséum National d'Histoire Naturelle. Section B, Adansonia 7: 259-329.
    • Cope, T.A. (1982). Flora of Pakistan 143: 1-678. Department of Botany, University of Karachi, Karachi.
    • Clayton, W.D. & Renvoize, S.A. (1982). Gramineae Flora of Tropical East Africa 3: 451-898.

    Literature

    Kew Backbone Distributions
    • Bosser, J. & Renvoize, S.A. (2018). Flore des Mascareignes 203: 1-276. IRD Éditions, MSIRI, RBG-Kew, Paris.
    • Verloove, F. (2017). New xenophytes from the Canary islands (Gran Canaria and Tenerife; Spain) Acta Botanica Croatica 76: 120-131.
    • Clayton, W.D. & Snow, N. (2010). A key to Pacific Grasses: 1-107. Kew Publishing, Royal Botanic Gardens, Kew.
    • Kandwal, M.K. & Gupta, B.K. (2009). An update on grass flora of Uttarkhand Indian Journal of Forestry 32: 657-668.
    • Ahmed, Z.U. (ed.) (2008). Encyclopedia of Flora and Fauna of Bangladesh 12: 1-505. Asiatic Society of Bangladesh.
    • Newman, M., Ketphanh, S., Svengsuksa, B., Thomas, P., Sengdala, K., Lamxay, V. & Armstrong, K. (2007). A checklist of the vascular plants of Lao PDR: 1-394. Royal Botanic Gardens, Edinburgh.
    • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.
    • Flora of North America Editorial Committee (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.
    • Noltie, H.J. (2000). Flora of Bhutan 3(2): 457-883. Royal Botanic Gardens, Edinburgh.
    • Press, J.R. et al. (2000). Annotated Checklist of the Flowering Plants of Nepal: i-x, 1-430. Natural History Museum, London.
    • Lee, W.T. (1996). Lineamenta Florae Koreae: 1-1688. Soul T'ukpyolsi: Ak'ademi Sojok.
    • Karthikeyan, S., Jain, S.K., Nayar, M.P. & Sanjappa, M. (1989). Florae Indicae Enumeratio: Monocotyledonae: 1-435. Botanical Survey of India, Calcutta.
    • Robertson, S.A. (1989). Flowering Plants of Seychelles: 1-327. Royal Botanic Gardens, Kew.
    • Morat, P. & Veillon, J.-M. (1985). Contributions à la conaissance de la végétation et de la flore de Wallis et Futuna Bulletin du Muséum National d'Histoire Naturelle. Section B, Adansonia 7: 259-329.
    • Cope, T.A. (1982). Flora of Pakistan 143: 1-678. Department of Botany, University of Karachi, Karachi.
    • Clayton, W.D. & Renvoize, S.A. (1982). Gramineae Flora of Tropical East Africa 3: 451-898.
    • Walker, E.H. (1976). Flora of Okinawa and the southern Ryukyu islands: 1-1159. Smithsonian Institution Press, Washington D.C., U.S.A.
    • Hepper, F.N. (ed.) (1972). Flora of West Tropical Africa, ed. 2, 3(2): 277-574.
    • Gilliland, H.B. (1971). A revised flora of Malaya 3: 1-319. The Royal Botanic Gardens, Singapore.
    • Bosser, J. (1969). Gramiées des pasturages et des cultures a Madagascar: 1-440. ORSTOM, Paris.
    • Henty, E.E. (1969). A manual of the grasses of New Guinea: 1-215. Division of Botany, Dpt. of Forests, LAE, New Guinea.
    • Hubbard, C.E. & Vaughan, R.E. (1940). Grasses of Mauritius and Rodriguez: 1-128. Crown Agents for the Colonies, London.
    • Camus, E.G. & Camus, A. in H. Lecomte (1922). Flore Générale de l'indo-Chine 1(3): 193-336.
    Flora of Tropical East Africa
    • Miq., Fl. Ind. Bat. 3: 437 (1857).

    Sources

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

    Flora of West Tropical Africa
    Flora of West Tropical 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
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    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 2020. 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 2020. 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