Calamus ceratophorus Conrard, Notul. Syst. (Paris) 7: 24 (1938)

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Distribution

Map uses TDWG level 3 distributions (http://www.nhm.ac.uk/hosted_sites/tdwg/geogrphy.html)
Vietnam present (World Checklist of Arecaceae)B
Indochinese endemic, known only from the type locality. (T. Evans & K. Sengdala & B. Thammavong & O.V. Viengkham & J. Dransfield, A Synopsis of the Rattans (Arecaceae: Calamoideae) of Laos and Neighbouring Parts of Indochina. 2002)A

Discussion

  • This species perhaps belongs in Section VIII of Beccari (1908) and thus section Macropodus of Furtado (1956). The neuter flower sits on a slender projection about 2 mm tall arising on one side of the strongly pedicellate involucrophore, making the female rachillae very distinctive within Indochina. They closely resemble those of the Sulawesi species Calamus pedicellatus Becc. ex Heyne (see Kramadibrata & Dransfield 1992), but that species has a short, erect inflorescence and different leaf sheath armature. The sheath and leaves of C. ceratophorus look rather similar to some C. poilanei so great caution should be used in identifying sterile material lacking climbing organs. The leaflet surfaces lack bristles in the type of C. ceratophorus and further material may show that this is a reliable diagnostic feature. Vu Van Dung & Le Huy Guang (1996) give detailed notes on the habitat and uses for this species which otherwise remains known only from the type. Without published information on the voucher specimens this important information remains of limited value to other users. (T. Evans & K. Sengdala & B. Thammavong & O.V. Viengkham & J. Dransfield, A Synopsis of the Rattans (Arecaceae: Calamoideae) of Laos and Neighbouring Parts of Indochina. 2002)A

Biology And Ecology

  • Unknown. (T. Evans & K. Sengdala & B. Thammavong & O.V. Viengkham & J. Dransfield, A Synopsis of the Rattans (Arecaceae: Calamoideae) of Laos and Neighbouring Parts of Indochina. 2002)A

Conservation

  • Unknown, but the species should be considered at high risk until its distribution, ecology and abundance are better known. (T. Evans & K. Sengdala & B. Thammavong & O.V. Viengkham & J. Dransfield, A Synopsis of the Rattans (Arecaceae: Calamoideae) of Laos and Neighbouring Parts of Indochina. 2002)A

Common Name

  • None recorded. (T. Evans & K. Sengdala & B. Thammavong & O.V. Viengkham & J. Dransfield, A Synopsis of the Rattans (Arecaceae: Calamoideae) of Laos and Neighbouring Parts of Indochina. 2002)A

Uses

  • None recorded. (T. Evans & K. Sengdala & B. Thammavong & O.V. Viengkham & J. Dransfield, A Synopsis of the Rattans (Arecaceae: Calamoideae) of Laos and Neighbouring Parts of Indochina. 2002)A

Materials Examined

  • Vietnam (South Annam): Nhatrang Province, La Mere et l'Enfant, undated, (pist.), Poilane 5054 (P). (T. Evans & K. Sengdala & B. Thammavong & O.V. Viengkham & J. Dransfield, A Synopsis of the Rattans (Arecaceae: Calamoideae) of Laos and Neighbouring Parts of Indochina. 2002)A

Bibliography

    A. T. Evans & K. Sengdala & B. Thammavong & O.V. Viengkham & J. Dransfield, A Synopsis of the Rattans (Arecaceae: Calamoideae) of Laos and Neighbouring Parts of Indochina. 2002
    B. World Checklist of Arecaceae