Crotalaria incana L., Fabaceae

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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Common name(s): [more details]

Chinese: yuan ye zhu shi dou

English: fuzzy rattlebox, fuzzy rattlepod, shakeshake, silver rattlepod, woolly rattlepod

Hawaiian: kūkaehoki, kolomona

Palauan: kuroteraria

Habit:  shrub

Description:  "Erect annual or suffrutescent perennial herbs; stems 2.5-13.3 dm long, weakly striate, usually spreading long-pubescent.  Leaves trifoliolate, leaflets elliptic, ovate, or obovate, 1-7 cm long, 0.6-4.4 cm wide, veins 3-6 on each side of midvein, both surfaces usually spreading long-pubescent, apex rounded, often retuse or mucronate, base rounded or broadly cuneate, petioles 20-80 mm long, stipules triangular, 3-8 mm long, persistent or caducous.  Flowers 8.5-16 mm long, 5-30 in leaf-opposed or terminal, lax to crowded inflorescences, rachis 5-23 cm long (incl. peduncle), bracts linear-triangular, 2-8 mm long, pendent, caducous or persistent, bracteoles at apex of pedicel, linear to filiform; calyx usually spreading long-pubescent, the tube 1.5-3 mm long, the lobes 4.5-12 mm long, lateral lobes distinct at apex; petals yellow, with age with red or brown lines near base, standard 8.5-16 mm long, 5-11.6 mm wide, wings oblong, 7-13 mm long, 2.5-5 mm wide, keel petals with nontwisted short beak, margins lanate; elongated anthers 1.5-2.5 mm long, short ones 0.5-0.9 mm long.  Pods tan or dark brown at maturity, 2.8-3.9 cm long, nonstipitate, spreading long-pubescent.  Seeds ca. 40 per pod, brown or black, 1.8-3 mm long, smooth"  (Wagner et al., 1999; p. 660).

Habitat/ecology:  In Hawai‘i, "naturalized in disturbed areas such as roadsides, pastures, and agricultural land, 0-410 m" (Wagner et al., 1999; p. 660).  In Samoa, "rare on roadsides on Upolu" (Whistler, 1988; p. 22). Arid lowlands and moist uplands in the Galápagos Islands (McMullen, 1999; p. 201).

Propagation:  Seed

Native range:  "Widespread in tropical America and perhaps also indigenous in Africa and Madagascar, introduced or adventive in other parts of the tropics" (Smith, 1985; p. 269).

Presence:

Pacific
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Federated States of Micronesia Pohnpei Islands	Pohnpei Island	introduced invasive	Whistler, W. A./Steele, O. (1999) (p. 52)
Federated States of Micronesia Pohnpei Islands	Pohnpei Island	introduced invasive	Herrera, Katherine/Lorence, David H./Flynn, Timothy/Balick, Michael J. (2010) (p. 90) Vouchers cited: M.J. Balick 4086 (NY, PTBG), N.L.H. Krauss 1891c (BISH), N.L.H. Krauss 1901 (BISH), N.L.H. Krauss 1903 (BISH), N.S. Tangalin 1269 (PTBG) Naturalized
Federated States of Micronesia Pohnpei Islands	Pohnpei Island		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2000) (voucher ID: PTBG 42752) Taxon name on voucher: Crotalaria incana
Federated States of Micronesia Pohnpei Islands	Pohnpei Island		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2007) (voucher ID: PTBG 50093) Taxon name on voucher: Crotalaria incana
Federated States of Micronesia Yap Islands	Yap (Waqab) Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 106)
Fiji Fiji Islands	Viti Levu Island	introduced cultivated	Smith, Albert C. (1985) (pp. 269-270) Voucher cited: DA (FDA 15449)
French Polynesia Society Islands	Mopelia (Mapetia, Maupiha‘a, Maupihoa, Mopiha‘a) Atoll	introduced invasive	Sachet, M.-H. (1983) (p. 28) Voucher cited: Sachet 919 (US)
French Polynesia Society Islands	Tahiti Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Vouchers cited: J. Florence 2883 (PAP), J. Florence 4458 (PAP), J. Florence 4702 (PAP) Adventice
French Polynesia Society Islands	Tahiti Island		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1981) (voucher ID: PTBG 37286) Taxon name on voucher: Crotalaria incana L.
French Polynesia Tuamotu Archipelago	Makatea (Ma‘atea) Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Voucher cited: J. Florence 2999 (PAP) Adventice
French Polynesia Tuamotu Archipelago	Tikehau (Tikahau) Atoll	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Voucher cited: J. Florence 7103 (PAP) Adventice
Guam Guam Island	Guam Island	introduced	Raulerson, L. (2006) (p. 36)
State of Hawaii Hawaiian Islands	Hawai‘i (Big) Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 660)
State of Hawaii Hawaiian Islands	Kaho‘olawe Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 660)
State of Hawaii Hawaiian Islands	Kaua‘i Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 660)
State of Hawaii Hawaiian Islands	Lāna‘i Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 660)
State of Hawaii Hawaiian Islands	Maui Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 660)
State of Hawaii Hawaiian Islands	Moloka‘i Island	introduced invasive	Hughes, Guy D'Oyly (1995) (p. 5) Voucher cited: Hughes s.n. (BISH) Common in lowland areas and fire adapted.
State of Hawaii Hawaiian Islands	Ni‘ihau Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 660)
State of Hawaii Hawaiian Islands	O‘ahu Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 660)
Kiribati Tungaru (Gilbert) Islands	Tarawa Atoll		Swarbrick, John T. (1997) (p. 90) Presence not verified.
Marshall Islands Ralik Chain	Jaluit (Jãlwõj) Atoll	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 106)
Marshall Islands Ralik Chain	Jaluit (Jãlwõj) Atoll	introduced invasive	Fosberg, F. R./Sachet, M.-H. (1962) (p. 19) Voucher cited: Fosberg 39478 (US)
Marshall Islands Ralik Chain	Kwajalein (Kuwajleen) Atoll	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 106)
Marshall Islands Ralik Chain	Kwajalein (Kuwajleen) Atoll	introduced invasive	Whistler, W. A./Steele, O. (1999) (p. 52) Vouchers cited: Fosberg 48049, Herbst 8963, Whistler 11247
Marshall Islands Ratak Chain	Majuro (Mãjro) Atoll		Wagner, W. L./ Herbst, D. R./Weitzman, A./Lorence, D.H. (2013)
New Caledonia New Caledonia	New Caledonia Islands		Swarbrick, John T. (1997) (p. 90)
New Caledonia New Caledonia Archipelago	Île Grande Terre	introduced invasive	Tassin, Jacques (2005)
New Caledonia New Caledonia Archipelago	Île Grande Terre	introduced	MacKee, H. S. (1994) (p. 82) Vouchers cited: Blanchon 795 (NOU), MacKee 12717, MacKee 13151, MacKee 30767, Toutain 3714 (NOU)
Palau Palau (Belau ) (main island group)	Babeldaob Island	introduced invasive	Space, James C./Waterhouse, Barbara/Miles, Joel E./Tiobech, Joseph/Rengulbai, Kashgar (2003) (p. 100)
Palau Palau (Belau ) (main island group)	Kayangel (Ngcheangel) Island		Wagner, W. L./ Herbst, D. R./Weitzman, A./Lorence, D.H. (2013)
Palau Palau (Belau ) (main island group)	Koror (Oreor) Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 106)
Palau Palau (Belau ) (main island group)	Koror (Oreor) Island		Beleu National Museum (Republic of Palau. Koror.) (1976) (voucher ID: BNM 10038) Taxon name on voucher: Crotalaria incana L.
Palau Palau (Belau ) (main island group)	Koror (Oreor) Island		Beleu National Museum (Republic of Palau. Koror.) (1969) (voucher ID: BNM 441) Taxon name on voucher: Crotalaria incana L.
Palau Palau (Belau ) (main island group)	Koror (Oreor) Island		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1969) (voucher ID: PTBG 22780) Taxon name on voucher: Crotalaria incana
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		ILDIS Co-ordinating Centre (2013)
Philippines Philippine Islands	Philippine Islands		Merrill, Elmer D. (1923) (p. 272) In wast places in and about towns, locally abundant. A pantropic weed.
Samoa Western Samoa Islands	Upolu Island		Whistler, W. A. (1988) (p. 22) Rare
Samoa Western Samoa Islands	Upolu Island		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1995) (voucher ID: PTBG 43784) Taxon name on voucher: Crotalaria incana
Solomon Islands Solomon Islands	Solomon Islands		Swarbrick, John T. (1997) (p. 90)
Solomon Islands Solomon Islands	Solomon Islands	introduced	ILDIS Co-ordinating Centre (2013)
Solomon Islands Solomon Islands	Solomon Islands	native	Hancock, I. R./Henderson, C. P. (1988) (p. 60)
United States (other Pacific offshore islands) Johnston Atoll	Johnston Island	introduced invasive	Amerson, A. Binion, Jr./Shelton, Philip C. (1976) (p. 55)
United States (other Pacific offshore islands) Midway Atoll	Midway Atoll	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 660)
United States (other Pacific offshore islands) Midway Atoll	Sand Island	introduced invasive	Starr, Forest/Starr, Kim/Loope, Lloyd (2008) (pp. B-7)
United States (other Pacific offshore islands) Palmyra Atoll	Palmyra Atoll	introduced invasive	Wester, Lyndon (1985) (p. 24)
Vanuatu New Hebrides Islands	Vanuatu (Republic of)	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)	Australia (continental)	introduced	ILDIS Co-ordinating Centre (2013)
Central America Central America (Pacific rim)	Costa Rica (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Central America Central America (Pacific rim)	El Salvador (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Central America Central America (Pacific rim)	Guatemala (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Central America Central America (Pacific rim)	Honduras (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Central America Central America (Pacific rim)	Nicaragua (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Central America Central America (Pacific rim)	Panama (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
China China	China (People's Republic of)	introduced invasive cultivated	Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013) "Sparse grasslands, along trails; below 100-2000 m".
Indonesia Indonesia	Indonesia (Republic of)		ILDIS Co-ordinating Centre (2013)
Japan Japan	Japan	introduced	Mito, Toshikazu/Uesugi, Tetsuro (2004) (p. 184)
Malaysia Malaysia	Malaysia (country of)		ILDIS Co-ordinating Centre (2013)
Mexico Mexico	Mexico (United Mexican States)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Singapore Singapore	Singapore (Republic of)	introduced invasive	Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. (2009) (p. 29) Naturalised
South America (Pacific rim) South America (Pacific rim)	Chile (Republic of)	native	ILDIS Co-ordinating Centre (2013)
South America (Pacific rim) South America (Pacific rim)	Colombia	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
South America (Pacific rim) South America (Pacific rim)	Ecuador (Republic of) (continental)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
South America (Pacific rim) South America (Pacific rim)	Perú (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
South America (Pacific rim) South America (Pacific rim)	Perú (Republic of)	native	ILDIS Co-ordinating Centre (2013)
Taiwan Taiwan Island	Taiwan Island	introduced invasive cultivated	Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013) "Sparse grasslands, along trails; below 100-2000 m".
Thailand Thailand	Thailand (Kingdom of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Vietnam Vietnam	Vietnam (Socialist Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)

Indian Ocean
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
La Réunion (France) La Réunion Island	La Réunion Island	introduced	ILDIS Co-ordinating Centre (2013)
Mauritius Mautitius Islands (Mauritius and Rodrigues)	Mauritius Island	introduced	ILDIS Co-ordinating Centre (2013)

Control:  If you know of control methods for Crotalaria incana, please let us know.