Halophila beccarii   Ascherson,  1871 (Seagrass)
Organism information awaits expert curation
Taxonomy
Kingdom:Plantae
Phylum:Magnoliophyta
Class: Equisetopsida
Order:Alismatales
Family:Hydrocharitaceae

Image copyrights: Annamalai University

Description
Size: Erect lateral shoots grow up to 2 cm.

Submerged herbs .Plants monoecious. Rhizomes creeping, branched or unbranched, slender, fleshy, transparent with single root at each node; roots with soft root hairs; internodes 1.2-4.2 cm long, 0.5-1 mm thick. Scales 2; the one embracing the rhizome obcordate, truncate to subtruncate at base, emarginate to subacute at apex, entire along margins, convolute, hyaline; the other embracing the shoot, elliptic, subtruncate at base, subacute to acute at apex, entire along margins, convolute, hyaline, with conspicuous midrib.
Shoots erect, up to 2.4 cm long, rarely branched, with a pseudowhorl of 6-11 leaves at each node; petioles 3-15 mm long, sheathing; sheaths emarginate to retuse at apex, scarious along margins, hyaline. Lamina oblong-lanceolate, cuneate at base, acute at apex, entire or minutely spinulose along margins, glabrous. Cross-veins absent. Intramarginal nerves 2, joining at apex with conspicuous midrib.
Flowers solitary, axillary, male and female flowers borne either in successive lateral branches or distantly, both subtended by spathes. Males flowers upto 1 cm long; spathes oblong, lanceolate, subtruncate at base, acute at apex, entire, convex, cleft apically when the flower protrudes at maturity. Pedicels slender, hyaline. Tepals 3, oblong, subtruncate at base, obtuse at apex, entire, hyaline, convex, imbricate, pale brown. Anthers 3, linear-oblong, sessile, 2-celled, pale brown, intact in bud, only hyaline connective tissue remains in opened flowers. Pollen grains ellipsoid to oblongoid, contained in mucilaginous sheaths. Female flowers projecting laterally at maturity. Ovary oblongoid. Hypanthium upto 2 mm long, curved upwardly. Styles 2-3, unequal, filiform, papillose.
Fruits ellipsoid to ovoid, pericarp membranous, translucent; beak curved upwards. Seeds globose, reticulate, hard, reddish brown. Embryo subglobose, hard, white; cotyledon spirally coiled at the upper side.

According to den Hartog (1970), this species is dioecious.
It usually grows as mixed population with Halophila ovalis and Halodule pinifloia.


Synonym (s)

Common Name (s)
• Kadal Paasi (Tamil)
• Ilai Paasi (Tamil)
• Aaku Naasi (Telugu)
• Samuthra Naasu (Telugu)
Economic Importance and Threats

Ecology
Habitat:  Estuarine, Sandy, Muddy, Coastal
Trophic Level:  Producer

Biogeography


• Tamil Nadu, Parangipettai INDIA (Record: 30/09/1978)
• Tamil Nadu, Manoliputti INDIA
• Tamil Nadu, Vellar Estuary (Lat: 11.43) (Long: 79.76) INDIA
• Tamil Nadu, Pichavaram INDIA (Record: 11/02/1979)
• Tamil Nadu, Tuticorin INDIA (Record: 24/02/1987, 02/09/1988) (Depth: ±1.5 mts)
• Tamil Nadu, Cuddalore O.T. Port INDIA (Record: 18/03/1987) (Depth: ±1.5 mts)
• Tamil Nadu, Vellar Estuary INDIA (Record: 23/03/1987) (Depth: ±1.5 mts)
• Tamil Nadu, Parangipettai, Annankoil INDIA (Record: 23/03/1987) (Depth: ±2.5 mts)
• Tamil Nadu, Pichavaram INDIA (Record: 28/03/1987) (Depth: ±3 mts)
• Tamil Nadu, Tiruchchendur, Punnakayal INDIA (Record: 17/07/1987) (Depth: ±2.5 mts)
• Andhra Pradesh, Prakasam, Chinnaganjam INDIA (Record: 25/06/1988) (Depth: ±2 mts)
• Andhra Pradesh, Nellore, Tummalapenta INDIA (Record: 01/07/1988) (Depth: ±1.5 mts)
• Andhra Pradesh, Prakasam, Karedu INDIA (Record: 03/07/1988) (Depth: ±1.5 mts)
• Andhra Pradesh, Nellore, Isakapalle INDIA (Record: 05/07/1988) (Depth: ±2.5 mts)
• Andhra Pradesh, Nellore, Utukuru INDIA (Record: 06/07/1988) (Depth: ±2 mts)
• Andhra Pradesh, Bhimunipatnam INDIA (Record: 08/09/1988) (Depth: ±0.5 mts)
• Andhra Pradesh, Kakinada Port INDIA (Record: 11/09/1988) (Depth: ±1 mts)
• Andhra Pradesh, Nellore, Krishnapatnam INDIA (Record: 16/09/1988) (Depth: ±2 mts)
• Tamil Nadu, Gulf of Mannar INDIA
• Palk Bay INDIA
• Andaman and Nicobar Islands INDIA
• Gujarat INDIA
• Maharashtra INDIA
• Goa INDIA
• Karnataka INDIA
• West Bengal INDIA
• Orissa INDIA
• Andhra Pradesh INDIA
• Tamil Nadu INDIA
• Tamil Nadu, Cuddalore, Uppanar Estuary INDIA (Record: 1988-1989)
• West Coast INDIA
• Andhra Pradesh, Bhavanapadu Mangrove INDIA
• Andhra Pradesh, Nuvvalarevu Mangrove INDIA
• Tamil Nadu, Vellar Estuary INDIA
• Tamil Nadu, Pamban INDIA
• Tamil Nadu, Manoli Island INDIA
• Lakshadweep INDIA
• Tamil Nadu, Porto Novo INDIA (Record: 01/1987-09/1988)
• Tamil Nadu, Punnakayal INDIA (Record: 01/1987-09/1988)
• Tamil Nadu, Tuticorin INDIA (Record: 01/1987-09/1988)

Literature Source(s)
  • Kannan L and Thangaradjou (1998) Seaweeds and seagrasses of Porto Novo Annamalai University, Parangipettai 46 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
  • Balasubramanian, R; Kannan, L and Thangaradjou, T (2000) Screening of seagrasses for antibacterial activity against bacterial pathogens Seaweed Research and Utilisation Seaweed Research and Utilisation Association, Tamil Nadu 22 (1 & 2) 101-106 Available at - NIO, Goa
  • 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
  • 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
  • Kalimuthu, S; Kaliaperumal, N and Ramalingam, JR (1995) Distribution of algae and seagrasses in the estuaries and backwaters of Tamil Nadu and Pondicherry Seaweed Research and Utilisation Seaweed Research and Utilisation Association 17(1-2) 79-86 Available at - NIO, Goa
  • Untawale, AG; Dhargalkar, VK and Deshmukhe, GV (2000) Prioritization of potential sites for marine biodiversity conservation in India Setting biodiversity conservation priorities for India: Summary of the findings and conclusions of the biodiversity conservation prioritization project World Wide Fund for Nature - India, New Delhi (India) Available at - http://drs.nio.org/drs/bitstream/2264/1614/2/Setting_Biodiversity_Conserv_Priorities_India_2000_1_104.pdf
  • (2006) Algaebase Available at - http://www.algaebase.org/
  • Swain, PK; Rao, NR and Mohan, S (2008) New mangrove habitats and additions to the flora of Srikakulam district, Andhra Pradesh, India Indian Journal of Forestry Commonwealth Forestry Association 31 431-434 Available at - http://www.indiaenvironmentportal.org.in/files/Indian%20Journal%20of%20Forestry%201.pdf
  • Jagtap, TG; Desai, K and Rodrigues, R (2003) Coastal vegetation: patterns in a tourist region Coastal tourism, environment, and sustainable local development TERI 131-150 Available at - NIO, Goa
  • Ranjitham, NS; Thirumaran, G; Anantharaman, P; Nightingale, VD and Balasubramanian, R (2008) Associated Fauna of Seaweeds and Seagrasses in Vellar Estuary American-Eurasian Journal of Botany IDOSI Publications 1 (1) 9-16 Available at - http://www.idosi.org/aejb/1%281%2908/3.pdf
  • 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
  • Parthasathy, N; Ravikumar, K; Ganesan, R and Ramamurthy, K (1991) Distribution of seagrasses along the coast of Tamil Nadu, Southern India Aquatic botany Elsevier 40(1) 145-153 Available at - NIO, Goa.
  • Jagtap, TG (1991) Distribution of seagrasses along the Indian coast Aquatic Botany Elsevier B.V. 40(1) 379-386 Available at - NIO, Goa

Page last updated on:2011-09-29

Back to Search