Halodule wrightii   Ascherson,  1868 (Seagrass)
Organism information awaits expert curation
Class: Equisetopsida

Image copyrights: Ronald C. Phillips

Plants dioecious. Rhizomes creeping, branched, often moniliferous, flexible, white to pale brown; internodes upto 2.6 cm long; roots 1-7 at each node, slender, unbranched, white. Shoots upto 15 cm long, erect, branched or unbranched, bearing 2-3 leaves at each branch; stems upto 4.2 cm with 1-7 mm long internodes; scales linear-oblong, subtruncate at base, acute to obtuse or rarely oblique at apex, scarious, convolute, entire along margins, with many vertical discontinuous tannin dashes; leaf sheaths linear, convolute, transparent with numerous reddish tannin streaks, persisting longer than leaf blades; lamina linear, narrowed at base, entire along margins.
Male flowers 2, subequal, dorsally connate at stalk-apices; stalks slender, terete, white; anthers oblongoid, white when young, brown when mature; upper anther ca 4 mm long, lower anther ca 3 mm long with numerous vertical reddish-brown tannin dashes, dehiscing longitudinally. Female flowers sessile, enclosed by leafy sheaths; ovaries ovoid; styles terete, unequal, filiform, terminal or subterminal, lateral in fruits; fruits globose to subglobose or ovoid, mostly in pairs, rarely with aborted ovary with persistent lateral styles; testa hard, stony, smooth with tannin mosaics. Flowering and fruiting from March to July.

Synonym (s)

Common Name (s)
• Korai Paasi (Tamil)
• Ghadda Naasi (Telugu)
• Ghar Naasi (Telugu)
• Paasi (Telugu)
Economic Importance and Threats

Habitat:  Estuarine, Sandy, Muddy


• Tamil Nadu, Pazhayar Estuary INDIA (Record: 27/03/1987) (Depth: ±0.5 mts)
• Tamil Nadu, Ramanathapuram, Rameswaram INDIA (Record: 22/04/1988) (Depth: ±2 mts)
• Andhra Pradesh, Prakasam, Pedhapallipalem Backwaters INDIA (Record: 25/06/1988) (Depth: ±2 mts)
• Andhra Pradesh, Gunnamola-Kothapatnam Backwaters INDIA (Record: 28/06/1988) (Depth: ±1.5 mts)
• Andhra Pradesh, Nellore, Venkateshpuram-Tummalapenta Backwaters INDIA (Record: 01/07/1988) (Depth: ±1.5 mts)
• Andhra Pradesh, Pattapalem-Isakkapalle INDIA (Record: 05/07/1988) (Depth: ±1.5 mts)
• Andhra Pradesh, Krishnapatnam Harbour INDIA (Record: 08/07/1988) (Depth: ±1 mts)
• West Bengal INDIA
• Andhra Pradesh INDIA
• Tamil Nadu INDIA
• Tamil Nadu, Kathuvallimuni INDIA
• Tamil Nadu, Pamban INDIA

Literature Source(s)
  • Ramamurthy, K; Balakrishnan, NP; Ravikumar, K and Ganesan, R (1992) Seagrasses of Coromandel Coast India Botanical Survey of India, Coimbatore 80 pp Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Benthic habitat mapping - Image gallery Coastal Services Center, National Oceanic and Atmospheric Administration (NOAA) Available at - http://www.csc.noaa.gov/benthic/resources/gallery/gallery.htm
  • Jagtap, TG; Komarpant, DS and Rodrigues, R (2003) The seagrasses of India World atlas of seagrasses University of California Press, Berkeley, USA 101-108 Available at - NIO, Goa
  • (2006) Algaebase Available at - http://www.algaebase.org/
  • Thangaradjou, T and Kannan, L (2005) Marine sediment texture and distribution of seagrasses in the Gulf of Mannar Biosphere Reserve Seaweed Res Utilis NISCAIR 27(1&2) 145 - 154 Available at - http://www.casmbenvis.nic.in/sdnp/coral%20reef%20pdf/C11.pdf
  • Tanaji,G; Jagtap, Deepali,S; Komarpant, and Rodrigues, RS (2003) Status of a seagrass ecosystem:an ecologically sensitive wetland habitat from India Wetlands 23(1) 161–170 Available at - http://www.springerlink.com/content/awjp1469442q5g75/fulltext.pdf

Page last updated on:2011-02-25

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