Monocotyledons / Monocotiledóneas
Isachne R. Br.
EOL Text
This species occurs throughout much of south and south-east Asia into Oceania, from India and Sri Lanka east to China and Japan and south through Indochina, the Philippines and Indonesia to Australia and New Zealand, as well as on a number of Pacific Ocean island groups (Board of Trustees of the Royal Botanic Garden, Kew 2012, Weed Science Society of America 2012).
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| Rights holder/Author | © International Union for Conservation of Nature and Natural Resources |
| Source | http://www.iucnredlist.org/apps/redlist/details/168638 |
"Herbs, culms to 30 cm, decumbent, glabrous at nodes. Leaf-sheaths 1.5-3.5 cm; ligule to 3 mm; blades lanceolate, 2-6 x 0.5-0.8 cm, flat, tubreculate-pilose along nerves. Panicles to 4 cm; pedicel 1-5 mm. Spikelets ovoid-globose, to 2 mm; florets unequal, of different texture; glumes boat-shaped, scaberulous; lower glume to 2.5 mm, 11-nerved, acute; upper glumes to 2 mm, 7-9 nerved; lower lemma to 2 mm, 5-nerved, glabrous, paleate; upper lemma to 1.8 mm, subcrustaceous, granular, ciliate. Anthers to 1.8 mm. Ovary elliptic, to 0.2 mm."
Flowering and fruiting: Throughout the year
Isachne dispar Trinius; I. heterantha Hayata; Panicum bellum Steudel, nom. illeg. superfl.; Sphaerocaryum pulchellum (Roth) Merrill; Steudelella pulchella (Roth) Honda.
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| Rights holder/Author | eFloras.org Copyright © Missouri Botanical Garden |
| Source | http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=220006833 |
Perennial. Culms stiffly erect, 35–45 cm tall, unbranched, nodes widely spaced, glabrous. Leaf sheaths very short, much shorter than internodes and shorter than blade, slightly inflated, glabrous or setose; leaf blades lanceolate-ovate, thick, tough, 1–2.5 × 0.3–0.7 cm, veins many, riblike, abaxial surface minutely papillose, adaxial surface scabrid or hispidulous on veins, margins pectinate-setose, apex acuminate; ligule absent. Panicle broadly pyramidal, 1.5–4 cm, glandular; branches stiff, horizontally spreading, close-set, smooth; pedicels stout, shorter than or equaling spikelets. Spikelets globose, 1.2–1.3 mm, brownish green; florets similar; glumes shorter than florets, thickly membranous with broad scarious margins, lower glume 3-veined, upper glume 5-veined, densely hispid with thick hairs, apex rounded; lemmas strongly plano-convex, leathery, back minutely white-granular, margins scurfy-pubescent, lower lemma very slightly longer and narrower.
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| Rights holder/Author | eFloras.org Copyright © Missouri Botanical Garden |
| Source | http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=250070943 |
"
Global Distribution
Southern Western Ghats
Indian distribution
State - Kerala, District/s: Thiruvananthapuram
"
"Trailing perennials; culms 30-60 cm high, trailing; nodes glabrous. Leaves 4-10 x 0.2-0.6 cm, ovate-lanceolate, glabrous, base rounded, margin serrulate; sheath glabrous; ligule a tuft of hairs. Panicle 4-10 cm long, branches serrulate. Spikelets 2-2.5 x 1.5-2 mm, globose; glumes similar, 1.5-2 x 1 mm, broadly ovate; first lemma 2 x 1 mm, obtuse, glabrous; palea 2-nerved; second lemma 1.25 x 1 mm, broadly ovate, obtuse, ciliate along the margin; palea 1 x 1 mm, 2-keeled; stamens 3; anthers 1.5-2 mm long."
Red List Criteria
Year Assessed
Assessor/s
Reviewer/s
Contributor/s
Justification
This species is widespread with stable populations and does not face any major threats, it is a serious agricultural weed and this problem may be increasing. It is therefore assessed as Least Concern.
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| Rights holder/Author | © International Union for Conservation of Nature and Natural Resources |
| Source | http://www.iucnredlist.org/apps/redlist/details/168638 |
Habitat and Ecology
Systems
- Terrestrial
- Freshwater
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| Rights holder/Author | © International Union for Conservation of Nature and Natural Resources |
| Source | http://www.iucnredlist.org/apps/redlist/details/177013 |
Isotype for Isachne purpurascens Glassman
Catalog Number: US 2153554
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Card file verified by examination of alleged type specimen
Preparation: Pressed specimen
Collector(s): S. F. Glassman
Year Collected: 1949
Locality: Mt. Ninani, Ponape; alt. 2550 ft., Pohnpei [Ponape], Pohnpei [Ponape] Is., Pohnpei, Micronesia, Federated States of, Caroline Islands, Pacific Islands
Elevation (m): 777 to 777
- Isotype: Glassman, S. F. 1952. Mem. Bernice Pauahi Bishop Mus. 209: 130.
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| Rights holder/Author | This image was obtained from the Smithsonian Institution. Unless otherwise noted, this image or its contents may be protected by international copyright laws. |
| Source | http://collections.mnh.si.edu/search/botany/?irn=2135306 |