Pacific Island Ecosystems at Risk (PIER)

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Stylosanthes viscosa
(L.) Sw., Fabaceae
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Present on Pacific Islands?  no

Primarily a threat at high elevations?  no

Common name(s): [more details]

English: seca, shrubby stylo

Habit:  herb

Description:  "Herb with trifoliate leaves, small yellow pea flowers and stipules.  Perennial to 0.8 m high, covered with dense sticky hairsLeaflets 5-12 mm long, 2-5 mm wide, patchy red-resinous below.  Pod with white markings and minute hook"  (Smith, 2002; pp. 65-66).

"An ascending and spreading or prostrate and matted, much-branched, perennial legume. Stems to 1 m long, densely pubescent with short viscid hairs. Leaflets to 25 mm long, 5 mm wide but usually much smaller, acute or obtuse, punctate beneath, shortly hairy or hispidulous, with two to four pairs of conspicuous veins. Petioles 2.5 to 5.0 mm long, hispidulous, viscid. Rachis 1 to 2 mm long. Sheath of the stipules 3.5 to 5.5 mm long, 1 to 2 mm longer than the teeth, hispidulous and viscid on the back, three- to five-nerved. Inflorescence a small, crowded ovoid spike, two- to five-flowered. Outer bracts usually trifoliate. Inner bract unifoliate, the sheath equaling or slightly exceeding the teeth, hispidulous and viscid on the back, five- to seven-nerved. Calyx tube 3 to 7 mm long, glabrous to pubescent. Standard sub-orbiculate, 4 to 7 mm long. Wings 4 to 5 mm long, auriculate, spurred within at the base. Keel petals 3 to 4 mm long, falcate. Loment to 2.5 mm long, shortly hairy, reticulately nerved. Beak short, less than half as long as the upper articulation, usually from one-third to one-quarter as long, shortly hairy, strongly uncinate, often coiled" (Mohlenbrock, 1957, cited by FAO).

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).

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 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
State of Hawaii
Hawaiian Islands
Hawai‘i (Big) Island introduced
invasive
Pratt, Linda W./Bio, Leali‘i F. (2012) (p. 77)
Voucher cited: L.W. Pratt & J. Seide 3766 (BISH)
State of Hawaii
Hawaiian Islands
Maui Island introduced
invasive
Herbst, Derral R./Staples, George W./Imada, Clyde T. (2004) (p. 8)
Vouchers cited: H. Oppenheimer H109904 (BISH), F. Starr & K. Martz 000129-1 (BISH), F. Starr et al. 000429-1 (BISH)
State of Hawaii
Hawaiian Islands
O‘ahu Island introduced
invasive
Herbst, Derral R./Staples, George W./Imada, Clyde T. (2004) (p. 8)
Voucher cited: K. Nagata & W. Takeuchi 3714 (BISH)
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
cultivated
Smith, Nicholas M. (2002) (pp. 65-66)
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)
Mexico
Mexico
Mexico (United Mexican States) uncertain if native
ILDIS Co-ordinating Centre (2013)
Nicaragua
Nicaragua
Nicaragua (Republic of) uncertain if native
ILDIS Co-ordinating Centre (2013)
Panama
Panama
Panama (Republic of) uncertain if native
ILDIS Co-ordinating Centre (2013)
Also reported from
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
United States (continental except west coast)
United States (other states)
United States (other states) uncertain if native
ILDIS Co-ordinating Centre (2013)


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This page was created on 3 APR 2005 and was last updated on 26 OCT 2006.