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Image of Asian watergrass
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Asian Watergrass

Hygroryza aristata (Retz.) Nees ex Wight & Arn.

Comments

provided by eFloras
A floating grass forming pure mats on the surface of the water; cattle are fond of it and people have been known to eat the grain.
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cc-by-nc-sa-3.0
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of Pakistan Vol. 0: 19 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of Pakistan @ eFloras.org
editor
S. I. Ali & M. Qaiser
project
eFloras.org
original
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eFloras

Description

provided by eFloras
Floating aquatic herb; culm soft, rooting at nodes; ligules hyaline, apex truncate, 0.8 mm long; leaf-blades ovate to lance-ovate, 2-7 cm long, 1-2 cm wide, upper surface pappilate. Panicle loose, globose; axis short, 4-9 branches. Spikelets 1.8-2 cm long, including long awn; glumes none; lemma 5-nerved, lance-elliptic, suddely narrowed at both ends, hispidulous; callus stipe-like; palea as long as lemma, 3-nerved.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Gramineae (Poaceae) in Flora of Taiwan Vol. 0 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Poaceae in Flora of Taiwan @ eFloras.org
editor
Chang-Sheng Kuoh
project
eFloras.org
original
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eFloras

Description

provided by eFloras
Culms floating, 0.5–1.5 m long. Leaf blades 3–7 × 0.5–2.5 cm, adaxial surface papillate, base rounded to cordate, abruptly constricted to a ca. 1 mm petiole-like base at junction with sheath, apex obtuse; ligule truncate, 0.5–0.8 mm. Inflorescence triangular in outline; branches short, lowermost subverticillate, reflexing at maturity. Spikelets greenish; stipe 3–6 mm; lemma body 7.5–8 mm, hispidulous on back, spinulose on veins; awn 1–1.4 cm; palea keeled and spinulose along midvein, outer veins smooth, apex acute. Anthers ca. 3.5 mm.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of China Vol. 22: 186 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of China @ eFloras.org
editor
Wu Zhengyi, Peter H. Raven & Hong Deyuan
project
eFloras.org
original
visit source
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eFloras

Description

provided by eFloras
Mat-forming perennial; stems 30 cm or more long, spongy, with whorled feathery roots at the nodes. Leaf-blades flat, ovate-oblong, obtuse, 2.5-7.5 cm long, 12-20 mm wide, scaberulous above, smooth and glaucous beneath, rounded or subcordate at the base. Panicle triangular, 3-6 cm long and wide, the lower branches spreading or sometimes deflexed. Spikelets sessile or very shortly pedicelled with a long pedicel-like callus articulated with the panicle-branch or pedicel and falling with the spikelet; body of lemma up to 10 mm long, passing into the 10-12 mm long, scaberulous awn.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of Pakistan Vol. 0: 19 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of Pakistan @ eFloras.org
editor
S. I. Ali & M. Qaiser
project
eFloras.org
original
visit source
partner site
eFloras

Distribution

provided by eFloras
Nepal, India, Ceylon, Burma, S.E. Asia, China, Malaysia.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Annotated Checklist of the Flowering Plants of Nepal Vol. 0 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Annotated Checklist of the Flowering Plants of Nepal @ eFloras.org
author
K.K. Shrestha, J.R. Press and D.A. Sutton
project
eFloras.org
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eFloras

Distribution

provided by eFloras
Tropical Asia, India, Ceylon, Indo-China, southern China, and Taiwan to Malesia.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Gramineae (Poaceae) in Flora of Taiwan Vol. 0 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Poaceae in Flora of Taiwan @ eFloras.org
editor
Chang-Sheng Kuoh
project
eFloras.org
original
visit source
partner site
eFloras

Distribution

provided by eFloras
Distribution: as for genus.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of Pakistan Vol. 0: 19 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of Pakistan @ eFloras.org
editor
S. I. Ali & M. Qaiser
project
eFloras.org
original
visit source
partner site
eFloras

Elevation Range

provided by eFloras
200 m
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Annotated Checklist of the Flowering Plants of Nepal Vol. 0 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Annotated Checklist of the Flowering Plants of Nepal @ eFloras.org
author
K.K. Shrestha, J.R. Press and D.A. Sutton
project
eFloras.org
original
visit source
partner site
eFloras

Habitat & Distribution

provided by eFloras
An aquatic grass forming extensive floating mats in ponds and lakes, often in shade of trees. Fujian, Guangdong, Hainan, Taiwan, Yunnan [Bangladesh, Cambodia, India, Laos, Malaysia, Myanmar, Nepal, Pakistan, Sri Lanka, Thailand, Vietnam].
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of China Vol. 22: 186 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of China @ eFloras.org
editor
Wu Zhengyi, Peter H. Raven & Hong Deyuan
project
eFloras.org
original
visit source
partner site
eFloras

Synonym

provided by eFloras
Pharus aristatus Retzius, Observ. Bot. 5: 23. 1789; Pota-mochloa aristata (Retzius) Griffith ex Steudel; Zizania aristata (Retzius) Kunth.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of China Vol. 22: 186 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of China @ eFloras.org
editor
Wu Zhengyi, Peter H. Raven & Hong Deyuan
project
eFloras.org
original
visit source
partner site
eFloras