Pityrogramma calomelanos (L.) Link, Pteridaceae

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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  Reject, score: 12 (Go to the risk assessment).

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)
Federated States of Micronesia Chuuk Islands	Weno (Moen) Island		Wagner, W. L./ Herbst, D. R./Weitzman, A./Lorence, D.H. (2013)
French Polynesia Marquesas Islands	Eiao Island	introduced invasive	Lorence, David H./Wagner, Warren L. (2013)
French Polynesia Marquesas Islands	Eiao Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Adventice
French Polynesia Marquesas Islands	Fatu Hiva Island	introduced invasive	Lorence, David H./Wagner, Warren L. (2013)
French Polynesia Marquesas Islands	Fatu Hiva Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Vouchers cited: D.H. Lorence , L. Dunn , S.P. Perlman , K.R. Wood & J.-Y. Meyer 9022 (PAP), K.R. Wood 10106 (PAP) Adventice
French Polynesia Marquesas Islands	Fatu Hiva Island		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2003) (voucher ID: PTBG 39399) Taxon name on voucher: Pityrogramma calomelanos
French Polynesia Marquesas Islands	Fatu Hiva Island		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2003) (voucher ID: PTBG 40528) Taxon name on voucher: Pityrogramma calomelanos
French Polynesia Marquesas Islands	Fatu Hiva Island		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2003) (voucher ID: PTBG 40529) Taxon name on voucher: Pityrogramma calomelanos
French Polynesia Marquesas Islands	Hiva Oa Island	introduced invasive	Lorence, David H./Wagner, Warren L. (2013)
French Polynesia Marquesas Islands	Hiva Oa Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Adventice
French Polynesia Marquesas Islands	Mohotani (Mohotane, Mohotane) Island	introduced invasive	Lorence, David H./Wagner, Warren L. (2013)
French Polynesia Marquesas Islands	Mohotani (Mohotane, Mohotane) Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Voucher cited: S.P. Perlman & C.E. Wood 19236 (PAP) Adventice
French Polynesia Marquesas Islands	Nuku Hiva (Nukahiva) Island	introduced invasive	Lorence, David H./Wagner, Warren L. (2013)
French Polynesia Marquesas Islands	Nuku Hiva (Nukahiva) Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Vouchers cited: J. Florence 7446 (PAP), B. Toutain 4239 (PAP), S.P. Perlman 10020 (PAP) Adventice
French Polynesia Marquesas Islands	Tahuata (Tuhuata) Island	introduced invasive	Lorence, David H./Wagner, Warren L. (2013)
French Polynesia Marquesas Islands	Tahuata (Tuhuata) Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Voucher cited: D.H. Lorence & J.-Y. Meyer 8950 (PAP) Adventice
French Polynesia Marquesas Islands	Tahuata (Tuhuata) Island		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2003) (voucher ID: PTBG 39403) Taxon name on voucher: Pityrogramma calomelanos
French Polynesia Marquesas Islands	Ua Huka (Huahuna, Uahuka) Island	introduced invasive	Lorence, David H./Wagner, Warren L. (2013)
French Polynesia Marquesas Islands	Ua Huka (Huahuna, Uahuka) Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Voucher cited: L. Dunn & K.R. Wood 386 (PAP) Adventice
French Polynesia Marquesas Islands	Ua Huka (Huahuna, Uahuka) Island		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2003) (voucher ID: PTBG 40997) Taxon name on voucher: Pityrogramma calomelanos
French Polynesia Marquesas Islands	Ua Pou (Huapu, Uapou, Uapu) Island	introduced invasive	Lorence, David H./Wagner, Warren L. (2013)
French Polynesia Marquesas Islands	Ua Pou (Huapu, Uapou, Uapu) Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Voucher cited: D.H. Lorence, L. Dunn, K.R. Wood & T. Teikiehuupoo 9106 (PAP) Naturalized and abundant locally and along roadsides in moist areas.
French Polynesia Society Islands	Huahine Island	introduced	Fosberg, F. R. (1997) (p. 118)
French Polynesia Society Islands	Huahine Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Vouchers cited: J. Florence & R. Tahuaitu 11656 (PAP), F.R. Fosberg 63006 (PAP) Adventice
French Polynesia Society Islands	Maupiti (Maurua) Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Voucher cited: J.-F. Butaud & F.A. Jacq 64 (PAP) Adventice
French Polynesia Society Islands	Moorea Island	introduced	Fosberg, F. R. (1997) (p. 118)
French Polynesia Society Islands	Moorea Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Vouchers cited: T.A. Ranker & P.G. Trapp 1945 (PAP), J. Florence 2095 (PAP) Adventice
French Polynesia Society Islands	Raiatea (Havai) Island	introduced	Fosberg, F. R. (1997) (p. 118)
French Polynesia Society Islands	Raiatea (Havai) Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Vouchers cited: J. Florence 3501 (PAP), F.R. Fosberg & M.-H. Sachet 63149 (PAP) Adventice
French Polynesia Society Islands	Taha‘a Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Vouchers cited: J. Florence 10482 (PAP), J. Florence 10605 (PAP) Adventice
French Polynesia Society Islands	Tahiti Island	introduced	Fosberg, F. R. (1997) (p. 118)
French Polynesia Society Islands	Tahiti Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Vouchers cited: J. Florence 6956 (PAP), J. Florence 8771 (PAP), P. Birnbaum 40 (PAP), M. Guérin 751 (PAP) Adventice
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 (Belau ) (main island group)	Babeldaob Island	introduced invasive	Raulerson, L./Rinehart, A. F./Falanruw, M. C. (1996) (p. 13)
Palau Palau (Belau ) (main island group)	Babeldaob Island	introduced invasive	Space, James C./Lorence, David H./LaRosa, Anne Marie (2009) (p. 5) Voucher: Lorence 9837 (PTBG, BNM, NY, UC)
Palau Palau (Belau ) (main island group)	Babeldaob Island		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2008) (voucher ID: PTBG 131) Taxon name on voucher: Pityrogramma calomelanos (L.) Link
Palau Palau (Belau ) (main island group)	Ngerkebesang Island		Wagner, W. L./ Herbst, D. R./Weitzman, A./Lorence, D.H. (2013)
Palau Palau (Belau ) (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)
Papua New Guinea Papua New Guinea (eastern New Guinea Island)	Papua New Guinea (eastern New Guinea Island)		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1988) (voucher ID: PTBG 14156) Taxon name on voucher: Pityrogramma calomelanos
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 (2013) Voucher cited: T.S. Henshall 1358 (DNA)
Australia Australia (continental)	Queensland	introduced invasive	Australian Biological Resources Study (2013) 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).
Central America Central America (Pacific rim)	Costa Rica (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Central America Central America (Pacific rim)	El Salvador (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Central America Central America (Pacific rim)	Guatemala (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Central America Central America (Pacific rim)	Honduras (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Central America Central America (Pacific rim)	Nicaragua (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Central America Central America (Pacific rim)	Panama (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
China China	Hong Kong	introduced cultivated	Wu, Te-lin (2001) (p. 19) Ornamental.
Japan Japan	Japan	introduced	Mito, Toshikazu/Uesugi, Tetsuro (2004) (p. 181)
Mexico Mexico	Mexico (United Mexican States)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Singapore Singapore	Singapore (Republic of)	introduced invasive	Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. (2009) (p. 70) Naturalised
South America (Pacific rim) South America (Pacific rim)	Colombia	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
South America (Pacific rim) South America (Pacific rim)	Ecuador (Republic of) (continental)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
South America (Pacific rim) South America (Pacific rim)	Perú (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)

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
Seychelles Seychelles Islands	Seychelles Islands	introduced	Invasive Species Specialist Group (2017)

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) United States (other states)	USA (Florida)	introduced	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)

Control:  If you know of control methods for Pityrogramma calomelanos, please let us know.