Pacific Island Ecosystems at Risk (PIER)

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Myoporum laetum
G. Forst., Scrophulariaceae
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Present on Pacific Islands?  no

Primarily a threat at high elevations?  no

Risk assessment results:  Evaluate, score: 6 (Go to the risk assessment)

Common name(s): [more details]

English: myoporum, ngaio

Spanish: mioporo

Habit:  tree

Description:  "Tree to ca 12 m high with rough furrowed bark, much less commonly a shrub, generally of open habit with foliage towards end of branches. Leaf buds black or greenish black, rarely green, viscid, drying black. Petiole ca 1-1.5 cm long, scarcely distinct from attenuate base of lamina. Lamina 4-14 x 1-5-(6) cm, narrow- to broad-elliptic or obovate, often thick and almost fleshy, nearly always prominently dotted with pellucid glands, usually serrate to serrulate in upper 1/2, sometimes entire; apex mucronate, acute or short-acuminate. Juvenile leaves completely serrate. Flowers (1)-2-6; pedicels ca 10 mm long at anthesis. Calyx 2-3 mm long, divided almost to base; lobes lanceolate to ovate, acute to acuminate. Corolla 10-15 mm diameter; lobes greater than tube, white with purple dots and white-bearded inside. Style sparsely hairy. Drupe 5-10 mm long, narrow- to broad-ovoid or oblong, mauve to purple or reddish purple, occasionally white" (Webb et al., 1988; pp. 847-848).

Habitat/ecology:  In California, naturalized in coastal riparian areas (California Invasive Plant Council).

Propagation:  Seed

Native range:  New Zealand, naturalized elsewhere (GRIN).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Chile (offshore islands)
Juan Fernández Islands
Isla Más a Tierra (Robinson Crusoe Island) introduced
invasive
cultivated
Atkinson, Rachel/Sawyer, John (2011)
Chile (offshore islands)
Juan Fernández Islands
Isla Más a Tierra (Robinson Crusoe Island) introduced
cultivated
Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (pp. 490, 536, 555)
Voucher cited: Danton B(676)643. "Este pequeño árbol resistente es plantado desde mucho tiempo en el pueblo de San Juan Bautista donde se puede ver algunos grandes ejemplares.  Se trata de una planta bien adaptada al clima del Archipiélago como a las orillas del mar".
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
Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. (1988) (pp. 847-848)
"Mostly coastal but sometimes extending well inland".
United States (west coast)
United States (west coast states)
USA (California) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)

Comments:  Reported as an invasive species in California per California Invasive Plant Council.

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

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

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

References:

Atkinson, Rachel/Sawyer, John. 2011. Naturalized species in the Juan Fernández Archipelago, Chile. Unpublished spreadsheet.

Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido. 2006. Nouveau catalogue de la flore vaculaire de l'archipel Juan Fernández (Chile) [Nuevo catálogo de la flora vacular del Archipélago Juan Fernández (Chile)]. Acta Bot. Gallica 153(4):399-587.

U. S. Government. 2013. Integrated Taxonomic Information System (ITIS) (on-line resource).

U.S. Dept. Agr., Agr. Res. Serv. 2013. National Genetic Resources Program. Germplasm Resources Information Network (GRIN). Online searchable database.

U.S. Dept. Agr., Nat. Res. Cons. Serv. 2013. The PLANTS Database. National Plant Data Center, Baton Rouge, LA 70874-4490 USA.

Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. 1988. Flora of New Zealand, Volume IV: Naturalised pteridophytes, gymnosperms, dicotyledons. Botany Division, DSIR, Christchurch. 1365 pp.


Need more info? Have questions? Comments? Information to contribute? Contact PIER! (pier@hear.org)

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This page was created on 17 JAN 2004 and was last updated on 2 MAR 2008.