Pacific Island Ecosystems at Risk (PIER)

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Crotalaria goreensis
Guill. & Perr., Fabaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Common name(s): [more details]

English: gamba pea, Gambia pea, rattlepod

Habit:  shrub

Description:  "Erect or rather spreading annual or short-live perennial, up to 6-26 cm tall, simple to much branched.  Stem ribbed, densely pubescent, with appressed or usually mostly slightly spreading hairs.  Leaves 3-foliolate; leaflets variable, narrowly oblanceolate-oblong to obovate, up to 35-85 mm long, 8-25 mm wide, glabrous or sparsely appressed pubescent above, thinly appressed pubescent beneath; petiole up to 35-65 mm long. Stipules oblong-falcate, 9-25 mm long, 3-7 mm wide, acuminate, very unequal-sided.  Racemes 4-24 cm long, with many flowers crowded at least towards the top; bracts subulate or filiform, 3-4 mm long, early caducous; bracteoles inserted on the pedicel, filiform, 1-1.5 mm long, caducous.  Calyx 4-5 mm long, appressed or rather spreading pubescent especially on the lobes; lobes subulate-triangular, ± as long as the tube.  Standard ovate, yellow, veined or suffused with orange, brown or purple, glabrous outside; wings oblong, a little shorter than the keel; keel bent at right-angles in the lower half, with a well-developed straight untwisted beak, 8.5-10 (-11.5) mm long, conspicuously white lanate-pubescent on the lateral surfaces towards the upper margin.  Pod subsessile, oblong-ellipsoid, 15-20 mm long, 7-9 mm across, thinly pubescent with appressed or slightly spreading hairs, often mottled brown or purplish, 12-16-seeded.  Seeds oblong-reniform, ± 4 mm long, with a small aril, minutely granulate, sometimes radially veined, yellow, usually tinged orange or red" (Gillett et al., 1971; pp. 875-876).

"Annual herb or shrub to 2 m tall, most parts with short flattened hairs Leaves with 3 leaflets, prominent stipules in the axils.  Flowers yellow, pea-shaped, in racemes up to 25 cm long at the end of branches.  Pods inflated, maturing brown with many small orange-red seeds" (Smith, 2002; p. 59).

Habitat/ecology:  "Common on disturbed sites, roadsides, overgrazed pastures and in riparian habitats. It readily invades disturbed areas and prevents the regeneration of native species" (Smith, 2002; p. 59).  In east Africa, "deciduous woodland and grassland, sometimes on termite mounds, also persisting on roadsides and cultivated ground; 600-2400 m" (Gillett et al., 1971; pp. 875-876).

Propagation:  "Seed is dispersed in contaminated pasture seed and fodder. Also by machinery, vehicles and water." (Smith, 2002; p. 59).

Native range:  Tropical Africa (Smith, 2002; p. 59).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Nauru
Nauru Island
Nauru Island introduced
invasive
Thaman, R. R./Fosberg, F. R./Manner, H. I./Hassall, D. C. (1994) (p. 143)
Vouchers cited: Fosberg 58593 (US), Fosberg 58612 (US), Fosberg 58738 (US), Scully 106N (US), Thaman & Manner 3 (SUVA), Thaman & Manner 58 (SUVA), Thaman & Manner 22311 (SUVA), Swarbrick 9569 (BRIU)
Papua New Guinea
Papua New Guinea (eastern New Guinea Island)
Papua New Guinea (eastern New Guinea Island) introduced
ILDIS Co-ordinating Centre (2013)
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
Smith, Nicholas M. (2002) (p. 59)
Australia
Australia (continental)
Queensland introduced
invasive
Smith, Nicholas M. (2002) (p. 59)


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

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This page was created on 1 APR 2005 and was last updated on 13 OCT 2006.