Pacific Island Ecosystems at Risk (PIER)

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Adiantum raddianum
C.Presl, Pteridaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  High risk, score: 15 (Go to the risk assessment).

Other Latin names:  Adiantum cuneatum Langsd. & Fischer

Common name(s): [more details]

English: delta maidenhair fern

Habit:  fern

Description:  "Rhizome short-creeping, branched, clothed with dark brown, lance-attenuate, entire scales to 0.8 mm long. Fronds close, erect-arching, glabrous, mostly 15-45 cm long, stipes dark reddish-brown to blackish, naked, equalling or exceeding the blades. Blades deltate or lance-ovate to broadly ovate, to 30 cm broad (usually less), 3- to 4-pinnate; pinnae and pinnules stalked; ultimate divisions cuneate-flabellate, symmetrical or not, not articulate, the sterile margins with each vein ending in a small notch or sinus. Sori solitary or few on each ultimate pinnule; indusoid flap pale or whitish, more or less orbicular-reniform." (Howard, 1977; pp. 189-190).

Habitat/ecology:  In the Lesser Antilles, "roadside banks and paths at middle elevations, naturalized" (Howard, 1977; pp. 189-190). In Hawai‘i, "it grows on moist and shaded rocks, slopes, and river and roadside banks" (Wilson, 1996).

Propagation:  Spores

Native range:  South America. "This species has escaped from cultivation at many localities in the American tropics, so that its true natural range is difficult to ascertain" (Howard, 1977; pp. 189-190).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
French Polynesia
Gambier Islands
Mangareva (Gambier) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Naturalisée
French Polynesia
Marquesas Islands
Nuku Hiva (Nukahiva) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Naturalisée
French Polynesia
Society Islands
Bora Bora Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence 12085 (PAP)
Naturalisée
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 73 (PAP)
Naturalisée
French Polynesia
Society Islands
Moorea Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Vouchers cited: J. Florence 2232 (PAP), J. Florence 4797 (PAP), F.A. Jacq, J.-F. Butaud, F. Laure & V. Gaidou FJ 277 (PAP)
Naturalisée
French Polynesia
Society Islands
Tahiti Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Vouchers cited: P. Birnbaum 6 (PAP), M. Chaine 9 (PAP), J. Florence 2909 (PAP), J. Florence 3151 (PAP), J. Florence 3212 (PAP), J. Florence 7646 (PAP), J. Florence 8664 (PAP), J. Florence 8745 (PAP)
Naturalisée
French Polynesia
Society Islands
Tahiti Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1982) (voucher ID: PTBG 2786)
Taxon name on voucher: Adiantum raddianum
French Polynesia
Society Islands
Tahiti Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1981) (voucher ID: PTBG 2794)
Taxon name on voucher: Adiantum raddianum
French Polynesia
Society Islands
Tahiti Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1982) (voucher ID: PTBG 2795)
Taxon name on voucher: Adiantum raddianum
French Polynesia
Tuamotu Archipelago
Makatea (Ma‘atea) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Naturalisée
French Polynesia
Austral (Tubuai) Islands
Rurutu Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Naturalisée
State of Hawaii
Hawaiian Islands
Hawai‘i (Big) Island introduced
invasive
Wagner, W. L./Herbst, D. R./Lorence, D. H. (2013)
State of Hawaii
Hawaiian Islands
Kaua‘i Island introduced
invasive
Wagner, W. L./Herbst, D. R./Lorence, D. H. (2013)
State of Hawaii
Hawaiian Islands
Lāna‘i Island introduced
invasive
Wagner, W. L./Herbst, D. R./Lorence, D. H. (2013)
State of Hawaii
Hawaiian Islands
Maui Island introduced
invasive
Wagner, W. L./Herbst, D. R./Lorence, D. H. (2013)
State of Hawaii
Hawaiian Islands
Moloka‘i Island introduced
invasive
Wagner, W. L./Herbst, D. R./Lorence, D. H. (2013)
State of Hawaii
Hawaiian Islands
O‘ahu Island introduced
invasive
Wagner, W. L./Herbst, D. R./Lorence, D. H. (2013)
Kiribati
Kiribati
Kiribati (Republic of) introduced
cultivated
Thaman, R. R. (1987) (p. 40)
Kiribati
Tungaru (Gilbert) Islands
Tarawa Atoll introduced
Fosberg, F. R./Sachet, M.-H. (1987) (p. 2)
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Colombia
Colombia
Colombia (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Costa Rica
Costa Rica
Costa Rica (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Ecuador (Mainland)
Ecuador
Ecuador (Republic of) (continental) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Mexico
Mexico
Mexico (United Mexican States) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Nicaragua
Nicaragua
Nicaragua (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Perú
Perú
Perú (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Singapore
Singapore
Singapore (Republic of) introduced
cultivated
Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. (2009) (p. 10)
Cultivated only
Indian Ocean
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Mascarene Islands
Mascarene Islands (Mauritius, La Reunion, Rodrigues)
Mascarene Islands introduced
Lorence, David (year unknown)

Comments:  Reported to be invasive in the Mascarene Islands (David Lorence, pers. com.) and in Africa (Rejmánek, 1996).


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This page was created on 16 JAN 2004 and was last updated on 30 DEC 2011.