Pityrogramma calomelanos (L.) Link, Pteridaceae

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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Acrostichum calomelanos L.; Gymnogramma calomelanos var. aureoflava Hook.; Gymnogramma ochracea C. Presl; Pityrogramma austroamericana Domin

Common name(s): [more details]

English: Dixie silverback fern, gold fern (var. austroamericana), gold-dust fern (var. austroamericana), silver fern

Habit:  fern

Description:  "Fronds ±erect, dark green, glossy. Stipe 10-50 cm long, with 2 or 4 vascular bundles. Lamina 2-pinnate-pinnatifid, ovate, narrowly ovate, triangular or narrowly triangular, 15-45 cm long, 6-27 cm wide; veins obscure. Sporangia spread uniformly over the fertile segments. 

Var. calomelanos:  Rhizome scales with an apical portion of 8-10 uniseriate cells; apical cell conical, eglandular. Stipe 15-50 cm long, with 2 vascular bundles. Lamina usually shorter than the stipe, 15-45 cm long, 6-27 cm wide; abaxial surface with white waxy indumentum, rarely glabrous; lowermost pinnae the largest. 

Var. austroamericana:  Rhizome scales with an apical portion of 8-10 uniseriate cells; apical cell spherical, sometimes glandular. Stipe 10-40 cm long, with 2 large and 2 small vascular bundles. Lamina 15-40 cm long, 9-15 cm wide; abaxial surface with golden yellow waxy indumentum; lowermost pinnae c. the same length as, or smaller than, the pair immediately above"  (Flora of Australia online).

Habitat/ecology:  In Australia, "on retaining walls, road cuttings, mining overburden or among rocks, occurring sometimes as a weed in pineapple and banana plantations" (Flora of Australia online).

Propagation:  Spores

Native range:  Mexico, Central and South America (GRIN).

Presence:

Pacific
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Commonwealth of the Northern Mariana Islands (US) Northern Mariana Islands	Alamagan Island	introduced	Raulerson, L. (2006) (p. 3)
Commonwealth of the Northern Mariana Islands (US) Northern Mariana Islands	Anatahan Island	introduced	Raulerson, L. (2006) (p. 3)
Commonwealth of the Northern Mariana Islands (US) Northern Mariana Islands	Pagan Island	introduced	Raulerson, L. (2006) (p. 3)
French Polynesia Marquesas Islands	Eiao Island	introduced invasive	Lorence, David H./Wagner, Warren L. (2008)
French Polynesia Marquesas Islands	Fatu Hiva Island	introduced invasive	Lorence, David H./Wagner, Warren L. (2008)
French Polynesia Marquesas Islands	Hiva Oa Island	introduced invasive	Lorence, David H./Wagner, Warren L. (2008)
French Polynesia Marquesas Islands	Mohotani (Mohotane, Mohotane) Island	introduced invasive	Lorence, David H./Wagner, Warren L. (2008)
French Polynesia Marquesas Islands	Nuku Hiva (Nukahiva) Island	introduced invasive	Lorence, David H./Wagner, Warren L. (2008)
French Polynesia Marquesas Islands	Tahuata (Tuhuata) Island	introduced invasive	Lorence, David H./Wagner, Warren L. (2008)
French Polynesia Marquesas Islands	Ua Huka (Huahuna, Uahuka) Island	introduced invasive	Lorence, David H./Wagner, Warren L. (2008)
French Polynesia Marquesas Islands	Ua Pou (Huapu, Uapou, Uapu) Island	introduced invasive	Lorence, David H./Wagner, Warren L. (2008)
French Polynesia Society Islands	Huahine Island	introduced	Fosberg, F. R. (1997) (p. 118)
French Polynesia Society Islands	Moorea Island	introduced	Fosberg, F. R. (1997) (p. 118)
French Polynesia Society Islands	Raiatea (Havai) Island	introduced	Fosberg, F. R. (1997) (p. 118)
French Polynesia Society Islands	Tahiti Island	introduced	Fosberg, F. R. (1997) (p. 118)
Guam Guam Island	Guam Island	introduced invasive cultivated	Stone, Benjamin C. (1970) (pp. 57-58)
State of Hawaii Hawaiian Islands	Hawai‘i (Big) Island		Bishop Museum (U.S.A. Hawaii. Honolulu.) (1908) (voucher ID: BISH 7700) Taxon name on voucher: Pityrogramma calomelanos (L.) Link
State of Hawaii Hawaiian Islands	Kaua‘i Island		Bishop Museum (U.S.A. Hawaii. Honolulu.) (1909) (voucher ID: BISH 7693) Taxon name on voucher: Pityrogramma calomelanos (L.) Link
State of Hawaii Hawaiian Islands	Maui Island		Bishop Museum (U.S.A. Hawaii. Honolulu.) (1951) (voucher ID: BISH 7728) Taxon name on voucher: Pityrogramma calomelanos (L.) Link
State of Hawaii Hawaiian Islands	Moloka‘i Island		Bishop Museum (U.S.A. Hawaii. Honolulu.) (1932) (voucher ID: BISH 7696) Taxon name on voucher: Pityrogramma calomelanos (L.) Link
State of Hawaii Hawaiian Islands	Ni‘ihau Island		Bishop Museum (U.S.A. Hawaii. Honolulu.) (1912) (voucher ID: BISH 1261) Taxon name on voucher: Pityrogramma calomelanos (L.) Link
State of Hawaii Hawaiian Islands	O‘ahu Island		Bishop Museum (U.S.A. Hawaii. Honolulu.) (1908) (voucher ID: BISH 7698) Taxon name on voucher: Pityrogramma calomelanos (L.) Link
Palau Palau (main island group)	Babeldaob Island	introduced invasive	Raulerson, L./Rinehart, A. F./Falanruw, M. C. (1996) (p. 13)
Palau Palau (main island group)	Babeldaob Island	introduced invasive	Space, James C./Lorence, David H./LaRosa, Anne Marie (2009) (p. 5) Voucher: Lorence 9837 (BNM, PTBG)
Palau Palau (main island group)	Palau Islands (main island group)	introduced	Fosberg, F. R./Otobed, D./Sachet, M.-H./Oliver, R. L./Powell, D. A./Canfield, J. E. (1980) (p. 4)
Wallis and Futuna Wallis and Futuna (Horne) Islands	Wallis (‘Uvea) Island	introduced invasive	Meyer, Jean-Yves (2007) (p. 39)

Pacific Rim
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Australia Australia (continental)	Northern Territory	introduced invasive	Australian Biological Resources Study (2008) Voucher cited: T.S. Henshall 1358 (DNA)
Australia Australia (continental)	Queensland	introduced invasive	Australian Biological Resources Study (2008) Vouchers cited: A.W. Dockrill 1241 (QRS), A.R. Bean 4028 (BRI); var. austroamericana D.A. Smith 107 (BRI), M. Hawken (BRI), R.G. Coveny 9406 (BRI, CANB).
Colombia Colombia	Colombia (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2009)
Costa Rica Costa Rica	Costa Rica (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2009)
Ecuador (Mainland) Ecuador	Ecuador (Republic of) (continental)	native	U.S. Dept. Agr., Agr. Res. Serv. (2009)
El Salvador El Salvador	El Salvador (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2009)
Guatemala Guatemala	Guatemala (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2009)
Honduras Honduras	Honduras (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2009)
Mexico Mexico	Mexico (United Mexican States)	native	U.S. Dept. Agr., Agr. Res. Serv. (2009)
Nicaragua Nicaragua	Nicaragua (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2009)
Panama Panama	Panama (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2009)
Perú Perú	Perú (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2009)

Indian Ocean
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Australia (Indian Ocean offshore islands) Christmas Island Group	Christmas Island	introduced invasive cultivated	Swarbrick, J. T. (1997) (p. 124) Rainforest clearings, minesites, disturbed areas.
Australia (Indian Ocean offshore islands) Christmas Island Group	Christmas Island	introduced	Orchard, Anthony E., ed. (1993) (p. 21)
Seychelles Seychelles Islands	Frégate Island		Robertson, S. A./Todd, D. M. (1983) (p. 59) Vouchers cited: Todd 12, Todd 19

Also reported from
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
United States (continental except west coast and Florida) United States (other states)	USA (Florida)	introduced	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2009)

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

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

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

Other Latin names:  Acrostichum calomelanos L.; Gymnogramma calomelanos var. aureoflava Hook.; Gymnogramma ochracea C. Presl; Pityrogramma austroamericana Domin

References:

Australian Biological Resources Study. 2008. Flora of Australia Online. Australian Biological Resources Study, Canberra.

Bishop Museum (U.S.A. Hawaii. Honolulu.). 1908. Voucher specimen #BISH7700(Forbes, C.N. s.n.).

Bishop Museum (U.S.A. Hawaii. Honolulu.). 1908. Voucher specimen #BISH7698(Rock, J.F.C. 13).

Bishop Museum (U.S.A. Hawaii. Honolulu.). 1909. Voucher specimen #BISH7693(Forbes, C.N. 1.K).

Bishop Museum (U.S.A. Hawaii. Honolulu.). 1912. Voucher specimen #BISH1261(Stokes, J.F.G s.n.).

Bishop Museum (U.S.A. Hawaii. Honolulu.). 1932. Voucher specimen #BISH7696(St.John, H. 12738).

Bishop Museum (U.S.A. Hawaii. Honolulu.). 1951. Voucher specimen #BISH7728(Chock, A.K. 333).

Fosberg, F. R. 1997. Preliminary checklist of the flowering plants and ferns of the Society Islands. Ed. by David R. Stoddart. U. Cal. Berkeley.

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.

Lorence, David H./Wagner, Warren L. 2008. Flora of the Marquesas Islands. National Tropical Botanical Garden and the Smithsonian Institution. Online database.

Meyer, Jean-Yves. 2007. Rapport de mission sur l'Ile d'Uvea (Wallis & Futuna) du 6 au 17 Novembre 2007: Inventaire preliminaire de la flore vasculaire secondaire [unpublished report]. Délégation à la Recherche, Ministère de l'Education, l'Enseignement Supérieur et la Recherche, B.P. 20981 Papeete, Tahiti, Polynésie française. 39 pp.

Orchard, Anthony E., ed. 1993. Flora of Australia. Vol. 50, Oceanic islands 2. Australian Government Publishing Service, Canberra.

Raulerson, L. 2006. Checklist of Plants of the Mariana Islands. University of Guam Herbarium Contribution 40:1-69. .

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.

Robertson, S. A./Todd, D. M. 1983. Vegetation of Frégate Island, Seychelles. In: Sachet, M. H., D. R. Stoddart, and F. R. Fosberg. Floristics and ecology of Western Indian Ocean islands. Atoll Research Bulletin No. 273. Smithsonian Institution, Washington. 253 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.

Swarbrick, J. T. 1997. Environmental weeds and exotic plants on Christmas Island, Indian Ocean: a report to Parks Australia. 101 pp. plus appendix.

U. S. Government. 2009. Integrated Taxonomic Information System (ITIS) (on-line resource).

U.S. Dept. Agr., Agr. Res. Serv. 2009. National Genetic Resources Program. Germplasm Resources Information Network (GRIN). Online searchable database.

U.S. Dept. Agr., Nat. Res. Cons. Serv. 2009. The PLANTS Database. National Plant Data Center, Baton Rouge, LA 70874-4490 USA.