Pacific Island Ecosystems at Risk (PIER)

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Senna hirsuta
(L.) H. S. Irwin & Barneby, Fabaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  Risk assessment of Senna hirsuta from the Government of Queensland, Australia (PDF format)

Other Latin names:  Cassia hirsuta L.

Common name(s): [more details]

Chinese: mao jia jue ming

English: stinking cassia

Habit:  shrub

Description:  "Herbs or shrubs, 0.6-2.5 m tall. Young branches, petioles, and rachises of leaves densely yellowish brown villous. Leaves 10-20 cm; petiole 3-6 cm, with a sessile, blackish brown, ovoid-oblong gland near insertion; rachis 7-10 cm, without glands; leaflets 3-7 pairs, ovate-oblong or oblong-lanceolate, 3-9 x 1.5-3.5 cm, papery, both surfaces villous, base subrounded, apex acuminate. Racemes axillary or several in axils of apical leaves forming a leafy panicle; peduncles and pedicels villous; bracts early caducous, subulate, hairy. Sepals 5, unequal in size, densely villous, 2 outer small, ovate to obovate, ca. 5 mm, 3 inner puberulent, similar but larger, 7-8 mm. Petals yellow, obovate, 1.4-1.8 cm, glabrous. Stamens 10, 6 or 7 of them fertile, unequal in length, anthers opening by apical pores, staminodes 3 or 4. Ovary hirsute, subsessile; style short, glabrous; stigma small. Legume long, slender, flat, 10-20 x ca. 0.5 cm, densely hirsute on surfaces of valves. Seeds numerous, flat, obovoid, 3-4 mm"  (Flora of China online).

"A coarse herb becoming softly woody in age or a shrub 0.5-3 m high.  From other weedy sennas occurring in Fiji, Senna hirsuta is readily distinguished by its abundant, pale indument.  The leaves are usually 10-25 cm long, with (2-) 3-6 pairs of accrescent leaflets, the distal ones with ovate to elliptic, acuminate blades up to 10.5 x 4 cm.  The 2-8-flowerred racemes have pedicels 10-25 mm long at anthesis and yellow petals up to 8-15 mm long.  The pods are stiffly ascending or outwardly recurved, up to 18 cm long, and very slender" (Smith, 1985; p. 111-112).

Habitat/ecology:  In Fiji, "established as a weed in villages and plantations, along roadsides, and on rocky shores of rivers" (Smith, 1985; p. 111-112).

Propagation:  Seed

Native range:  South America, most likely Brazil (Smith, 1985; p. 111-112).

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)
Floreana Group
Floreana Island introduced
invasive
Charles Darwin Foundation (2008)
Fiji
Fiji Islands
Ovalau Island introduced
invasive
Smith, Albert C. (1985) (pp. 111-112)
Voucher cited: Smith 7389
Fiji
Fiji Islands
Taveuni Island introduced
invasive
Smith, Albert C. (1985) (pp. 111-112)
Voucher cited: DA 11517
Fiji
Fiji Islands
Viti Levu Island introduced
invasive
Smith, Albert C. (1985) (pp. 111-112)
Vouchers cited: Greenwood 229, 787; DA 10892; DA 10890; DA 16659; Smith 4328; DA 5826; DA 11344; DA 11362; DA 2554; DA 11826; Meebold 16656
New Caledonia
New Caledonia
New Caledonia Islands   Swarbrick, John T. (1997) (p. 89)
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
invasive
Tassin, Jacques (2005)
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
invasive
cultivated
MacKee, H. S. (1994) (p. 73)
Vouchers cited: Franc 2240, Déméné in MacKee 15035, MacKee 16069, MacKee 39109, Renevier in MacKee 44396
Spontané
Papua New Guinea
Bismarck Archipelago
Bismarck Archipelago introduced
ILDIS Co-ordinating Centre (2013)
Papua New Guinea
Bismarck Archipelago
Bismarck Archipelago   Peekel, P. G. [translated by E. E. Henty] (1984) (p. 218)
Only collected in the area of Toma and Papratava.
Papua New Guinea
Papua New Guinea (eastern New Guinea Island)
Papua New Guinea (eastern New Guinea Island) introduced
ILDIS Co-ordinating Centre (2013)
Philippines
Philippine Islands
Philippine Islands introduced
invasive
Merrill, Elmer D. (1923) (p. 263)
Occasional in waste places in the settled areas at low altitudes.
Vanuatu
New Hebrides Islands
Vanuatu (Republic of)   Swarbrick, John T. (1997) (p. 89)
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
Australian Biological Resources Study (2013)
China
China
China (People's Republic of) introduced
cultivated
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
"Cultivated in Guangdong, Yunnan".
China
China
Hong Kong introduced
cultivated
Wu, Te-lin (2001) (p. 135)
As Cassia hirsuta L.
Colombia
Colombia
Colombia (Republic of) native
ILDIS Co-ordinating Centre (2013)
Costa Rica
Costa Rica
Costa Rica (Republic of) native
ILDIS Co-ordinating Centre (2013)
Ecuador (Mainland)
Ecuador
Ecuador (Republic of) (continental) native
ILDIS Co-ordinating Centre (2013)
El Salvador
El Salvador
El Salvador (Republic of) native
ILDIS Co-ordinating Centre (2013)
Guatemala
Guatemala
Guatemala (Republic of) native
ILDIS Co-ordinating Centre (2013)
Mexico
Mexico
Mexico (United Mexican States) native
ILDIS Co-ordinating Centre (2013)
Panama
Panama
Panama (Republic of) native
ILDIS Co-ordinating Centre (2013)
Perú
Perú
Perú (Republic of) 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. 79)
Naturalised
Thailand
Thailand
Thailand (Kingdom of) introduced
ILDIS Co-ordinating Centre (2013)
Vietnam
Vietnam
Vietnam (Socialist Republic of) introduced
ILDIS Co-ordinating Centre (2013)
Indian Ocean
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Seychelles
Seychelles Islands
Seychelles Islands introduced
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) native
ILDIS Co-ordinating Centre (2013)


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This page was created on 19 AUG 2002 and was last updated on 13 DEC 2010.