Pacific Island Ecosystems at Risk (PIER)

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Cyathea medullaris
(G. Forst.) Sw., Cyatheaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  High risk, score: 7 (Go to the risk assessment)

Other Latin names:  Polypodium medullare G. Forst.; Sphaeropteris medullaris (G. Forst.) Bernh.

Common name(s): [more details]

English: black tree fern, sago fern

Habit:  fern

Description:  "Caudex up to 15 m. or more tall, and 30 cm. in diameter, except towards base much thickened by dense mass of rootlets, black, marked by hexagonal scars of fallen stipites. Stipes stout, black, to 1 m. long, up to ± 8 cm. in diameter near base; tuberculate; copiously clad towards base by black linear paleae c. 3 mm. long. Rhachis (and secondary rhachides and costae) stout, pale brown, muricate, clad in brownish hairs, later glabrate. Lamina up to c. 6 x 2 m., 2-3-pinnate, coriac., dark green above, pale green below. Primary pinnae up to 1 m. long, oblong-lanceolate, attenuate; secondary up to 15 cm. long, narrow-oblong attenuate. Pinnules c. 1 cm. long, lower distinct, upper confluent, narrow-oblong obtuse to acute, subfalcate, crenate-serrate to crenulately lobed; margins recurved, veins several times forked. Sori up to c. 16 per pinnule, 1 mm. or more in diameter, us. cop. Indusium thin, at first covering sorus, splitting irregularly"  (Allan, 1982; p. 41).

Habitat/ecology:  Lowland forest in New Zealand  (Allan, 1982; p. 41).

Propagation:  Wind-dispersed spores.

Native range:  New Zealand and Fiji; also cultivated (GRIN).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Fiji
Fiji Islands
Fiji Islands native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
French Polynesia
Marquesas Islands
Fatu Hiva Island native
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Vouchers cited: J. Florence 7406 (PAP), D.H. Lorence , W.L. Wagner & J. Florence 6170 (PAP)
French Polynesia
Marquesas Islands
Hiva Oa Island native
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Vouchers cited: P.A. Schäfer 5632 (PAP), P.A. Schäfer 5913 (PAP)
French Polynesia
Marquesas Islands
Nuku Hiva (Nukahiva) Island native
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence 8427 (PAP)
French Polynesia
Marquesas Islands
Tahuata (Tuhuata) Island native
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: K.R. Wood 6520 (PAP)
French Polynesia
Society Islands
Moorea Island native
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
French Polynesia
Society Islands
Raiatea (Havai) Island native
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
French Polynesia
Society Islands
Tahiti Island native
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Vouchers cited: T.A. Ranker & P.G. Trapp 1904 (PAP), J. Florence 8820 (PAP), J. Florence 7790 (PAP), J. Florence 8820 (PAP)
French Polynesia
Austral (Tubuai) Islands
Rapa Island native
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence 6360 (PAP)
French Polynesia
Austral (Tubuai) Islands
Rurutu Island native
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Vouchers cited: J. Florence 5929 (PAP), J. Florence 6103 (PAP)
French Polynesia
Austral (Tubuai) Islands
Tubuai Island native
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Pitcairn Islands
Pitcairn Islands
Pitcairn Island native
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence & S. Waldren 11044 (PAP)
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
New Zealand
New Zealand
New Zealand (country) native
Allan, H. H. (1982) (p. 41)


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This page was created on 20 OCT 2011 and was last updated on 2 FEB 2013.