Pacific Island Ecosystems at Risk (PIER)

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Rubus megalococcus
Focke, Rosaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Habit:  shrub

Description:  "Scandent shrub with arching branches to 3 m high. Stems angled, glabrous or puberulent, prickly, prickles gradually narrowed from a broad base, 3-5 mm long, curved. Stipules linear-subulate, 5-12 x 1 mm, subcoriaceous, pilose or puberulent. Petioles 60-100 mm long, glabrous to puberulent, prickly. Leaves 3-foliolate, rarely 5-foliolate; leaflets ovate-lanceolate, 4-9 (-10) x 2-5 cm, subcoriaceous, with 9-15 pairs of secondary veins, base rounded, apex acuminate, margin serrate, lower surface glabrous, upper surface glabrous, midvein sparsely pilose. Inflorescences ± lax panicles, 10-30 mm long, with 15-25 flowers, with usually leafy, cymose branches; pedicels 5-10 mm long, puberulent or glabrous, occasionally with stipitate glands, sparsely prickly, prickles slightly curved, 1-2 mm long. Flowers 15-17 mm diameter; sepals ovate-lanceolate, 7-10 x 3-4 mm, apex acuminate, bifid, abaxially sparsely greenish pilose, adaxially pannose; petals suborbicular, 6-8 x 5-6 mm, pink; carpels glabrous. Fruits globose, 15-25 x 15-25 mm, with reflexed sepals; drupelets 7-10 x 5-8 mm, 10-20 per receptacle, glabrous, deep purplish to black. Rubus megalococcus is recognized by its angled, glabrous or puberulent stems, ovate-lanceolate leaflets, and large drupelets" (Harling & Andersson, 1996; p. 31).

Habitat/ecology:  In the Galápagos Islands (Santa Cruz) to 300 m elevation (Soria et al., 2002; pp. 51-52). In its native range, "between 3000 and 3600 m, in bunch grass páramo or in exposed vegetation near upper montane forest" (Harling & Andersson, 1996; p. 31).

Propagation:  Seed

Native range:  Colombia to Bolivia (Harling & Andersson, 1996; p. 31).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Ecuador (Galápagos Islands)
Santa Cruz Group
Santa Cruz Island introduced
invasive
cultivated
Charles Darwin Foundation (2008)
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)
Ecuador (Mainland)
Ecuador
Ecuador (Republic of) (continental) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Perú
Perú
Perú (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)

Comments:  Being considered for an eradication program in the Galápagos Islands (Chris Buddenhagen, pers. com.).

Control:  See other Rubus species for control suggestions.

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

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

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

References:

Charles Darwin Foundation. 2008. Database inventory of introduced plant species in the rural and urban zones of Galapagos. Charles Darwin Foundation, Galapagos, Ecuador.

Charles Darwin Research Station. 2005. CDRS Herbarium records.

Harling, G./Andersson, L., eds. 1996. Flora of Ecuador No. 56: 79. Rosaceae.

Soria, M./Taylor, U./Tye, A./Wilkenson, S. R. 2002. Identificación y manajo de malezas en las isles Galapágos. Fundación Charles Darwin, Parque Nacional Galapágos. 69 pp.

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


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 12 MAR 2012.