Pacific Island Ecosystems at Risk (PIER)

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Stylosanthes humilis
H.B.K., Fabaceae
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Present on Pacific Islands?  no

Primarily a threat at high elevations?  no

Other Latin names:  Stylosanthes figueroae Mohlenbr.

Common name(s): [more details]

English: Townsville lucerne, Townsville stylo

French: luzerne de Townsville

Spanish: alfalfa estilosante

Habit:  herb

Description:  "Prostrate to semi-erect herb; stipules scarious, fused to each other and to the basal part of the petiole but with free filiform apices, sparsely glandular-pubescent, persistent even after leaf fall; leaves pinnately trifoliolate; leaflets bluish green, narrowly elliptic to linear-lanceolate, glabrous but for a few scattered, yellowish glandular hairs; inflorescence an axillary or subterminal, few-flowered, congested head, the bracts and bracteoles with a dense clothing of long, stiff, yellowish, glandular hairs; corolla yellow; fruit usually a single 1-seeded article with the style persisting as an apical coiled beak" (Lewis & Owen, 1989).

"Herb with trifoliate leaves, small yellow pea flowers and stipules.  Much-branched, prostrate to ascending perennial herb; stems 3-40 cm long with a line of minute hairs on stem and bristles on most parts.  Leaflets 5-25 mm long, 1.8-5 mm wide.  Pods silky with hook 4-6 mm long.  Seed yellow-brown." (Smith, 2002; pp. 65-66).

Habitat/ecology:  "Grow on a wide range of soils including lighter, poorer quality soils.  Suited to warm humid areas with high rainfall.  Establish on disturbed sites, along roadsides and around settlements." (Smith, 2002; pp. 65-66).

In Fiji, "cultivated near sea level and perhaps locally and sparingly naturalized". (Smith, 1985; p. 259). On Christmas Island (Indian Ocean), introduced with grass seed for a golf course and now naturalized on roadsides and disturbed areas (Swarbrick, 1997; p. 128).

In New Caledonia, "introduit comme fourrage. Moins répandu que S. guianensis mais parfois localement abondant en dehors des pâturages" (MacKee, 1994; p. 90).

Propagation:  "Large amounts of seed produced and dispersed by stock and animal movement, as a contaminant of hay, and by vehicles and machinery, e.g. slashers and graders" (Smith, 2002; pp. 65-66).

Native range:  Mexico; Central and northern South America (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
Viti Levu Island introduced
invasive
cultivated
Smith, Albert C. (1985) (p. 259)
Vouchers cited: DA 2822, DA 2883, DA 3074, DA 12311, DA 13280, DA 5827, DA 7515
Perhaps locally and sparingly naturalized.
French Polynesia
Society Islands
Raiatea (Havai) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence 10350 (PAP)
Adventice
French Polynesia
Society Islands
Tahiti Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence 10715 (PAP)
Adventice
Guam
Guam Island
Guam Island   Wagner, W. L./ Herbst, D. R./Weitzman, A./Lorence, D.H. (2013)
Nauru
Nauru Island
Nauru Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 119)
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
invasive
cultivated
MacKee, H. S. (1994) (p. 90)
Vouchers cited: Botton in Veillon 1124 (NOU), MacKee 23804, MacKee 33177, MacKee 42360, Suprin in MacKee 44391
Samoa
Western Samoa Islands
Savai‘i Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2002) (voucher ID: PTBG 286)
Taxon name on voucher: Stylosanthes humilis
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)
Queensland introduced
invasive
cultivated
Smith, Nicholas M. (2002) (pp. 65-66)
Colombia
Colombia
Colombia (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Colombia
Colombia
Colombia (Republic of) uncertain if native
ILDIS Co-ordinating Centre (2013)
Costa Rica
Costa Rica
Costa Rica (Republic of) uncertain if native
ILDIS Co-ordinating Centre (2013)
El Salvador
El Salvador
El Salvador (Republic of) uncertain if native
ILDIS Co-ordinating Centre (2013)
Guatemala
Guatemala
Guatemala (Republic of) uncertain if native
ILDIS Co-ordinating Centre (2013)
Honduras
Honduras
Honduras (Republic of) uncertain if native
ILDIS Co-ordinating Centre (2013)
Mexico
Mexico
Mexico (United Mexican States) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Panama
Panama
Panama (Republic of) uncertain if native
ILDIS Co-ordinating Centre (2013)
Singapore
Singapore
Singapore (Republic of) introduced
invasive
Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. (2009) (p. 82)
Naturalised
Indian Ocean
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Australia (Indian Ocean offshore islands)
Christmas Island Group
Christmas Island introduced
invasive
Swarbrick, J. T. (1997) (p. 128)


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This page was created on 22 MAR 2005 and was last updated on 26 OCT 2006.