Calamus spp. Arecaceae

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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Common name(s): [more details]

Chamorro: bejuko-n-halumtano

English: rattan

Other: rotan, rotan bejuro-n-halumtan

Palauan: bangerenguis ra ngebard

Habit:  vine

Description:  "Shrubs or climbing palms (rattans) with hooks. Leaves pinnate, spiraled, the midrib (in some species) prolonged into a hooked flagella (the cirrus); sheath cylindric, rather long, ligulate at the upper end, sometimes flagellate. Leaflets linear, numerous, sometimes ciliate. Inflorescences unisexual (dioecious), inserted on petiolar sheath, often branched; main axis sometimes prolonged into a flagellate extension. Flowers numerous, in spikelets, female flowers usually beside sterile male flowers. Calyx briefly 3-lobed. Stamens 6, filaments somewhat connate, surrounding (usually) a pistillode. Corolla 3-fid, staminodes 6, ovary 3-celled, in female flowers. Fruit dry, stylose, within a scaly pericarp" (Stone, 1970; p. 137).

Habitat/ecology:  (no habitat/ecology info known by PIER)

Propagation:  Seed

Native range:  (native range not known by PIER)

Presence:

Pacific
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Federated States of Micronesia Pohnpei Islands	Pohnpei Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 81)
Guam Guam Island	Guam Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 81)
Palau Palau (main island group)	Babeldaob Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 81)
Palau Palau (main island group)	Babeldaob Island		Raulerson, L./Rinehart, A. F./Falanruw, M. C. (1996)
Palau Palau (main island group)	Babeldaob Island	introduced invasive	Space, James C./Lorence, David H./LaRosa, Anne Marie (2009) (p. 14) Voucher: Lorence 9918 (BNM, PTBG)
Palau Palau (main island group)	Babeldaob Island		Beleu National Museum (Republic of Palau. Koror.) (1990) (voucher ID: BNM 99999999) Taxon name on voucher: Calamus sp.
Palau Palau (main island group)	Babeldaob Island		Beleu National Museum (Republic of Palau. Koror.) (1982) (voucher ID: BNM 3176) Taxon name on voucher: none
Solomon Islands Solomon Islands	Guadalcanal Island		Bishop Museum (Honolulu) (1956) (voucher ID: BISH 628246) Taxon name on voucher: Calamus (Genus of Arecaceae)
Solomon Islands Solomon Islands	Mikira (San Cristobal) Island		Bishop Museum (Honolulu) (1932) (voucher ID: BISH 102389) Taxon name on voucher: Calamus hollrungii Becc.
Solomon Islands Solomon Islands	Ndeni (Santa Cruz) Island		Bishop Museum (Honolulu) (1972) (voucher ID: BISH 79842) Taxon name on voucher: Calamus (Genus of Arecaceae)
Solomon Islands Solomon Islands	Ndeni (Santa Cruz) Island		Bishop Museum (Honolulu) (1972) (voucher ID: BISH 699253) Taxon name on voucher: Calamus (Genus of Arecaceae)

Additional information:
Additional online information about Calamus spp. is available from the Hawaiian Ecosystems at Risk project (HEAR).

Information about Calamus spp. as a weed (worldwide references) may be available from the Global Compendium of Weeds (GCW).

Taxonomic information about Calamus spp. may be available from the Germplasm Resources Information Network (GRIN).

References:

Beleu National Museum (Republic of Palau. Koror.). 1982. Voucher specimen #BNM3176(Timberlake, J. 3176).

Beleu National Museum (Republic of Palau. Koror.). 1990. Voucher specimen #BNM99999999(Demei, HaruoTakeshi s.n.).

Bishop Museum (Honolulu). 1932. Voucher specimen #BISH 102389 (Brass, L.J. 2719).

Bishop Museum (Honolulu). 1956. Voucher specimen #BISH 628246 (J.L.Gressitt 2734).

Bishop Museum (Honolulu). 1972. Voucher specimen #BISH 79842 (Powell, J.M. 19878).

Bishop Museum (Honolulu). 1972. Voucher specimen #BISH 699253 (Powell, J.M. 19878).

Fosberg, F. R./Otobed, D./Sachet, M.-H./Oliver, R. L./Powell, D. A./Canfield, J. E. 1980. Vascular plants of Palau with vernacular names. Department of Botany, The Smithsonian Institution, Washington, D.C. 43 pp.

Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce. 1987. A geographical checklist of the Micronesian monocotyledonae. Micronesica 20:1-126.

Raulerson, L./Rinehart, A. F./Falanruw, M. C. 1996. A botanical reconnaissance of the proposed Compact-impact road alignment on Babeldaob Island, Republic of Palau. U. of Guam Herbarium Cont. No. 32. 78 pp.

Space, James C./Lorence, David H./LaRosa, Anne Marie. 2009. Report to the Republic of Palau: 2008 update on Invasive Plant Species. USDA Forest Service, Hilo, Hawai‘i. (In press).

Stone, Benjamin C. 1970. The flora of Guam. Micronesica 6:1-659.