Family: Fabaceae. Synonym(s): Status: Assessor Approved. Designation: H(Hawai'i)

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1 Taxon: Senna pendula (Willd.) H. Famil: Fabaceae Common Name(s): Christmas senna climbing cassia Easter cassia Snonm(s): Cassia bicapsularis (Misapplied) Cassia pendula Humb. & Bonpl. ex Willd. valamuerto Assessor: Chuck Chimera Status: Assessor Approved End Date: 20 Jun 2016 WRA Score: 14.0 Designation: H(Hawai'i) Rating: High Risk Kewords: Naturalized, Environmental Weed, Dense Stands, Prolific Seeder, Resprouts Option Answer 101 Is the species highl domesticated? =-3, n=0 n 102 Has the species become naturalized where grown? 103 Does the species have weed races? 201 Species suited to tropical or subtropical climate(s) - If island is primaril wet habitat, then substitute "wet tropical" for "tropical or subtropical" (0-low; 1-intermediate; 2-high) (See Appendix 2) 202 Qualit of climate match data (0-low; 1-intermediate; 2-high) (See Appendix 2) High 203 Broad climate suitabilit (environmental versatilit) =1, n=0 n Native or naturalized in regions with tropical or subtropical climates Does the species have a histor of repeated introductions outside its natural range? =1, n=0 =-2,?=-1, n=0 301 Naturalized beond native range = 1*multiplier (see Appendix 2), n= question Garden/amenit/disturbance weed n=0, = 1*multiplier (see Appendix 2) n 303 Agricultural/forestr/horticultural weed 304 Environmental weed n=0, = 2*multiplier (see Appendix 2) 305 Congeneric weed n=0, = 1*multiplier (see Appendix 2) 401 Produces spines, thorns or burrs =1, n=0 n 402 Allelopathic 403 Parasitic =1, n=0 n 404 Unpalatable to grazing animals =1, n=-1 n 405 Toxic to animals =1, n=0 n 406 Host for recognized pests and pathogens 407 Causes allergies or is otherwise toxic to humans =1, n=0 n 408 Creates a fire hazard in natural ecosstems High Page 1 of 15

2 Option Answer 409 Is a shade tolerant plant at some stage of its life ccle 410 Tolerates a wide range of soil conditions (or limestone conditions if not a volcanic island) =1, n=0 411 Climbing or smothering growth habit =1, n=0 n 412 Forms dense thickets =1, n=0 501 Aquatic =5, n=0 n 502 Grass =1, n=0 n 503 Nitrogen fixing wood plant =1, n=0 n Geophte (herbaceous with underground storage organs -- bulbs, corms, or tubers) Evidence of substantial reproductive failure in native habitat =1, n=0 =1, n=0 602 Produces viable seed =1, n= Hbridizes naturall 604 Self-compatible or apomictic 605 Requires specialist pollinators =-1, n=0 n 606 Reproduction b vegetative fragmentation =1, n=-1 n 607 Minimum generative time (ears) 701 Propagules likel to be dispersed unintentionall (plants growing in heavil trafficked areas) =1, n= Propagules dispersed intentionall b people =1, n= Propagules likel to disperse as a produce contaminant =1, n=-1 n 704 Propagules adapted to wind dispersal =1, n=-1 n 705 Propagules water dispersed =1, n= Propagules bird dispersed 707 Propagules dispersed b other animals (externall) 708 Propagules survive passage through the gut 801 Prolific seed production (>1000/m2) =1, n= Evidence that a persistent propagule bank is formed (>1 r) =1, n= Well controlled b herbicides =-1, n=1 804 Tolerates, or benefits from, mutilation, cultivation, or fire =1, n= Effective natural enemies present locall (e.g. introduced biocontrol agents) =-1, n=1 n n n Page 2 of 15

3 Supporting Data: 101 Is the species highl domesticated? n [No evidence of domestication] "Native to the New World tropics and subtropics, widel cultivated and naturalized; in Hawai'i cultivated and naturalized at low elevations often in dr, disturbed areas, m, documented from all of the main islands except Ni'ihau and Kaho'olawe" 102 Has the species become naturalized where grown? WRA Specialist Personal Communication NA 103 Does the species have weed races? WRA Specialist Personal Communication NA 201 Species suited to tropical or subtropical climate(s) - If island is primaril wet habitat, then substitute "wet tropical" for "tropical or subtropical" USDA, ARS, Germplasm Resources Information Network, National Plant Germplasm Sstem [Online Database]. High "Native: Northern America : Mexico Southern America Brazil: Brazil Caribbean: Cuba; Dominican Republic; Haiti; Hispaniola; Trinidad and Tobago Mesoamerica: Belize; Guatemala; Panama Northern South America: Venezuela Southern South America: Argentina; Paragua; Urugua Western South America: Bolivia; Colombia; Peru" 202 Qualit of climate match data High USDA, ARS, Germplasm Resources Information Network, National Plant Germplasm Sstem [Online Database] Broad climate suitabilit (environmental versatilit) n Page 3 of 15

4 Brown, S.H Senna pendula Factsheet. IFAS, Universit of Florida, Fort Mers, FL "in Hawai'i cultivated and naturalized at low elevations often in dr, disturbed areas, m" "Zone: 10a-12b, 28ºF" 204 Native or naturalized in regions with tropical or subtropical climates USDA, ARS, Germplasm Resources Information Network, National Plant Germplasm Sstem [Online Database]. "Native: Northern America : Mexico Southern America Brazil: Brazil Caribbean: Cuba; Dominican Republic; Haiti; Hispaniola; Trinidad and Tobago Mesoamerica: Belize; Guatemala; Panama Northern South America: Venezuela Southern South America: Argentina; Paragua; Urugua Western South America: Bolivia; Colombia; Peru Naturalized: Africa Macaronesia: Portugal - Madeira Islands Southern Africa: South Africa Australasia Australia: Australia Northern America South-Central U.S.A.: United States - Texas Southeastern U.S.A.: United States - Florida Southwestern U.S.A.: United States - California Pacific North-Central Pacific: United States - Hawaii Southern America Caribbean: Bahamas" 205 Does the species have a histor of repeated introductions outside its natural range? Langeland, K.A. & Burks, K.C. (eds.) Identification and Biolog of Non-Native Plants in Florida's Natural Areas. UF/IFAS Distribution, Gainesville, FL "Native to the New World tropics and subtropics, widel cultivated and naturalized" "naturalized in the Bahamas and Florida, and probabl also in southern Alabama, Louisiana, and Mississippi (Isel 1990). Cultivated in all regions of Florida (Hunt 1977, Nelson 1996). Often sold as C. bicapsularis (Isel 1990). Documented b herbarium records from peninsular Florida, from Hillsborough and Brevard south to Dade and Collier counties (Wunderlin et al. 1995)." Page 4 of 15

5 301 Naturalized beond native range Langeland, K.A. & Burks, K.C. (eds.) Identification and Biolog of Non-Native Plants in Florida's Natural Areas. UF/IFAS Distribution, Gainesville, FL USDA, ARS, Germplasm Resources Information Network, National Plant Germplasm Sstem [Online Database]. "in Hawai'i cultivated and naturalized at low elevations often in dr, disturbed areas, m, documented from all of the main islands except Ni'ihau and Kaho'olawe." "naturalized in the Bahamas and Florida, and probabl also in southern Alabama, Louisiana, and Mississippi (Isel 1990)." "Naturalized: Africa Macaronesia: Portugal - Madeira Islands Southern Africa: South Africa Australasia Australia: Australia Northern America South-Central U.S.A.: United States - Texas Southeastern U.S.A.: United States - Florida Southwestern U.S.A.: United States - California Pacific North-Central Pacific: United States - Hawaii Southern America Caribbean: Bahamas" Csurhes, S. & Edwards, R Potential environmental weeds in Australia: Candidate species for preventative control. Biodiversit Group, Environment Australia, Canberra, Australia "The plant is ver common in gardens in Brisbane and has naturalised in highl disturbed urban bushland and farmland throughout much of coastal south-east Queensland and northern New South Wales, primaril along roadsides and the banks of watercourses." 302 Garden/amenit/disturbance weed n [Disturbance weed with negative impacts in pastures and/or natural environment] "naturalized at low elevations often in dr, disturbed areas" 303 Agricultural/forestr/horticultural weed Motooka, P., Castro, L., Nelson, D., Nagai, G. & Ching,L Weeds of Hawaii's Pastures and Natural Areas: An Identification and Management Guide. CTAHR, UH Manoa, Honolulu, HI "Environmental impact: Forms dense stands in pastures and other disturbed areas. Seem to be more of a problem in drier areas." [Possibl, although palatable to livestock] 304 Environmental weed Page 5 of 15

6 Brisbane Cit Council Weed Identification Tool - Easter cassia Senna pendula var. glabrata. Motooka, P., Castro, L., Nelson, D., Nagai, G. & Ching,L Weeds of Hawaii's Pastures and Natural Areas: An Identification and Management Guide. CTAHR, UH Manoa, Honolulu, HI Csurhes, S. & Edwards, R Potential environmental weeds in Australia: Candidate species for preventative control. Biodiversit Group, Environment Australia, Canberra, Australia "Easter cassia (Senna pendula var. glabrata) is regarded as a significant environmental weed in New South Wales and Queensland. It was recentl listed as a priorit environmental weed in two Natural Resource Management regions, and is activel managed b communit groups in Queensland. Tpicall this species outcompetes native species through it's prolific fruit production and rapid growth rate." "Forms dense stands in pastures and other disturbed areas. Seem to be more of a problem in drier areas." "It is not considered to be a significant threat to native bushland." 305 Congeneric weed Senna alata, S. bicapsularis, S. didmobotra, S. obtusifolia [listed as significant weeds of natural areas] 401 Produces spines, thorns or burrs n [No evidence] "Scandent or weakl erect, foetid shrubs 2-6 m tall. Leaflets (2) 3-6 (7) pairs, the distal ones larger, broadl to narrowl obovate or obovate-cuneate, (1.8-) (-6.5) cm long, (0.7-) 1-2 (-2.4) cm wide, upper surface green, glabrous, lower surface slightl glaucous, glabrous or sparsel pubescent toward base or along midrib, apex rounded, mucronulate or shallowl emarginate, base obliquel cuneate, petiolar nectaries alwas between the first and sometimes also second pairs of leaflets, mm long, stipules linear-lanceolate to linear-oblanceolate, mm long, caducous. " 402 Allelopathic WRA Specialist Personal Communication Unknown 403 Parasitic n "Scandent or weakl erect, foetid shrubs 2-6 m tall" [Fabaceae. No evidence] 404 Unpalatable to grazing animals n Page 6 of 15

7 Cab-Jiménez, F. E., Ortega-Cerrilla, M. E., Quero-Carrillo, A. R., Enríquez-Quiroz, J. F., Vaquera-Huerta, H., & Carranco-Jauregui, M. E. (2015). Composición química digestibilidad de algunos árboles tropicales forrajeros de Campeche, México. Revista Mexicana de Ciencias Agrícolas, 11: "In order to evaluate their potential as an alternative foraging resource, the chemical composition, digestibilit and antinutritional factors of Lsiloma latisiliquum, Senna racemosa, Bauhinia divaricata, Senna pendula, Albizia lebbeck, Piscidia piscipula, and Lonchocarpus rugosus, were determined."... "The greatest digestibilit of DM was for S. pendula (89.1 and 85.0%), and the lowest for L. rugosus (40.1 and 48%), in both seasons." 405 Toxic to animals n Cab-Jiménez, F. E., Ortega-Cerrilla, M. E., Quero-Carrillo, A. R., Enríquez-Quiroz, J. F., Vaquera-Huerta, H., & Carranco-Jauregui, M. E. (2015). Composición química digestibilidad de algunos árboles tropicales forrajeros de Campeche, México. Revista Mexicana de Ciencias Agrícolas, 11: Quattrocchi, U CRC World Dictionar of Medicinal and Poisonous Plants: Common Names, Scientific Names, Eponms, Snonms, and Etmolog. CRC Press, Boca Raton, FL Wagstaff, D.J International poisonous plants checklist: an evidence-based reference. CRC Press, Boca Raton, FL [No evidence] "In order to evaluate their potential as an alternative foraging resource, the chemical composition, digestibilit and antinutritional factors of Lsiloma latisiliquum, Senna racemosa, Bauhinia divaricata, Senna pendula, Albizia lebbeck, Piscidia piscipula, and Lonchocarpus rugosus, were determined."... "The greatest digestibilit of DM was for S. pendula (89.1 and 85.0%), and the lowest for L. rugosus (40.1 and 48%), in both seasons." No evidence No evidence 406 Host for recognized pests and pathogens Brown, S.H Senna pendula Factsheet. IFAS, Universit of Florida, Fort Mers, FL "Potential Pests: Caterpillars, Hibiscus Mealbugs, Scales" 407 Causes allergies or is otherwise toxic to humans n Quattrocchi, U CRC World Dictionar of Medicinal and Poisonous Plants: Common Names, Scientific Names, Eponms, Snonms, and Etmolog. CRC Press, Boca Raton, FL Wagstaff, D.J International poisonous plants checklist: an evidence-based reference. CRC Press, Boca Raton, FL No evidence No evidence Page 7 of 15

8 408 Creates a fire hazard in natural ecosstems Motooka, P., Castro, L., Nelson, D., Nagai, G. & Ching,L Weeds of Hawaii's Pastures and Natural Areas: An Identification and Management Guide. CTAHR, UH Manoa, Honolulu, HI [Ma contribute to fuel load in fire prone areas] 'Forms dense stands in pastures and other disturbed areas. Seem to be more of a problem in drier areas." 409 Is a shade tolerant plant at some stage of its life ccle Floridata Senna pendula. %20pendula/578. "Light: Full sun for best flowering. Will tolerate partial shade." 410 Tolerates a wide range of soil conditions (or limestone conditions if not a volcanic island) Langeland, K.A. & Burks, K.C. (eds.) Identification and Biolog of Non-Native Plants in Florida's Natural Areas. UF/IFAS Distribution, Gainesville, FL Queensland Universit of Technolog Institute for Sustainable Resources Samford Ecological Research Facilit Weed Management Plan. QUT, Brisbane, Qld Floridata Senna pendula. %20pendula/578. "does well in sand soil" "Easter Cassia is an extremel invasive species which tolerates a wide range of environmental conditions. It favours damp, disturbed areas but will readil colonise an disturbed habitat." "Eas to grow and fast-growing. Moderatel salt tolerant. Likes sand soil."... "Moisture: Prefers moist soil, but not waterlogged. Onl moderatel drought tolerant." 411 Climbing or smothering growth habit n Motooka, P., Castro, L., Nelson, D., Nagai, G. & Ching,L Weeds of Hawaii's Pastures and Natural Areas: An Identification and Management Guide. CTAHR, UH Manoa, Honolulu, HI "Shrub that tends to sprawl over other plants, rocks, and fences." 412 Forms dense thickets Motooka, P., Castro, L., Nelson, D., Nagai, G. & Ching,L Weeds of Hawaii's Pastures and Natural Areas: An Identification and Management Guide. CTAHR, UH Manoa, Honolulu, HI Queensland Universit of Technolog Institute for Sustainable Resources Samford Ecological Research Facilit Weed Management Plan. QUT, Brisbane, Qld "Forms dense stands in pastures and other disturbed areas. Seem to be more of a problem in drier areas." "This species relies on ants, humans, rodents, gravit and water to disperse its seeds and will often be found in almost monospecific colonies." 501 Aquatic n Page 8 of 15

9 [Terrestrial] "Woodland, riparian habitats, tropical hammocks, coastal beaches. This is a variable species, belonging to a complex with numerous varieties." 502 Grass n USDA, ARS, Germplasm Resources Information Network, National Plant Germplasm Sstem [Online Database]. Famil: Fabaceae (alt.leguminosae) Subfamil: Caesalpinioideae Tribe: Cassieae Subtribe: Cassiinae 503 Nitrogen fixing wood plant n Downing, A. & Downing, K Plant of the Week - Cassia or Senna? Macquarie Universit, Sdne, Australia "How do ou tell a Senna from a Cassia? Both belong to the subfamil Caesalpinioideae of the pea famil, Fabaceae, but the re not peas, don t have the characteristic papilionaceous (butterfl like) pea flowers and don t have nitrogen fixing nodules on their roots2." 504 Geophte (herbaceous with underground storage organs -- bulbs, corms, or tubers) n "Scandent or weakl erect, foetid shrubs 2-6 m tall." 601 Evidence of substantial reproductive failure in native habitat Contu, S Senna pendula. The IUCN Red List of Threatened Species 2012: e.t a A en. n "Senna pendula is widespread and common in its natural range and it has been introduced elsewhere. There are no major threats to this species at present and the populations is believed to be stable, hence it is rated as Least Concern." 602 Produces viable seed Langeland, K.A. & Burks, K.C. (eds.) Identification and Biolog of Non-Native Plants in Florida's Natural Areas. UF/IFAS Distribution, Gainesville, FL "Flowers in late fall to earl winter, producing numerous seeds in each pod (Isel 1990)." "Seed production is prolific and the long-lived seeds are dispersed b water and soil movement" 603 Hbridizes naturall Page 9 of 15

10 WRA Specialist Personal Communication Unknown 604 Self-compatible or apomictic Marazzi, B., & Endress, P. K. (2008). Patterns and development of floral asmmetr in Senna (Leguminosae, Cassiinae). American Journal of Botan, 95(1), [Unknown] "In monomorphic enantiostlous taxa, such as Senna, the presence of both left and right fl oral morphs on the same plant and the observation that man of these plants are self-compatible indicate that geitonogamous self-pollination between different morphs is possible." 605 Requires specialist pollinators n Ramírez, N. (2004). Ecolog of pollination in a tropical Venezuelan savanna. Plant Ecolog, 173(2), "Flowers in racemes 3-30 cm long, pedicels 8-37 mm long, bracts subulate-ianceolate, 1-4 mm long, caducous as pedicels begin to e1ongate calx lobes ellowish to reddish brown, outer ones ovate to elliptic-ianceolate, 3-10 mm long, the innermost obovate to elliptic-suborbicular, mm long, margins membranous; petals golden ellow to orangish ellow, fading ellow, the standard broadl obovate-flabellate, the others ovate to obovate, the abaxial ones sometimes oblong-elliptic, the longest one mm long; staminodes Iinear-oblanceo late to rhombic-orbicular or inversel deitate, mm long; filaments of 4 median stamens mm long, those of lateral abaxial stamens dilated, mm long, that of central abaxial stamen mm long; anther of central abaxial stamen sterile, fertile anthers dehiscent b Ushaped slits." "Table A1. Plant species, Life form, habitat, and pollination modes of 164 plant species of a Venezuelan Central Plain" [Senna pendula Willd. var. meticola I. and B. - Pollination Sstem = Bee] 606 Reproduction b vegetative fragmentation n Floridata Senna pendula. %20pendula/578. "Propagation: B seeds." "The plant resprouts from the base after damage" 607 Minimum generative time (ears) Brown, S.H Senna pendula Factsheet. IFAS, Universit of Florida, Fort Mers, FL "Growth Rate: Fast" Page 10 of 15

11 701 Propagules likel to be dispersed unintentionall (plants growing in heavil trafficked areas) Brisbane Cit Council Weed Identification Tool - Easter cassia Senna pendula var. glabrata. "Seeds are often dispersed in dumped garden waste. The ma also be spread b water or in contaminated soil." 702 Propagules dispersed intentionall b people Contu, S Senna pendula. The IUCN Red List of Threatened Species 2012: e.t a A en. "It is commonl cultivated as an ornamental." 703 Propagules likel to disperse as a produce contaminant n Cit of Gold Coast Environmental weed fact sheets - Easter Cassia. "Dispersal mechanisms cultivated-humans, rubbish dumping [Accessed 20 Jun especiall persistent fruit pods, rodents, ants, water" 2016] 704 Propagules adapted to wind dispersal n "Pods pendulous, chartaceous, clindrical or compressed-clindrical, straight or slightl curved, often portions sterile and then variabl distorted, 7-18 cm long, tardil or not dehiscent, the meso carp and exocarp separating when fruit full ripe, the cavit with membranous interseminal septa. Seeds in 1-2 rows, brown, smooth and gloss or dull, obliquel obovoid, perpendicular to capsule axis, embedded in copious or scant pulp, mm long, without an areole." 705 Propagules water dispersed Brisbane Cit Council Weed Identification Tool - Easter cassia Senna pendula var. glabrata. [Accessed ] "Seed production is prolific and the long-lived seeds are dispersed b water and soil movement" "Seeds are often dispersed in dumped garden waste. The ma also be spread b water or in contaminated soil. Long-lived seeds are also dispersed b water and soil movement" Page 11 of 15

12 706 Propagules bird dispersed Langeland, K Merr Christmas Senna. Wildland Weeds 7(1): "Seeds ma be dispersed b birds, mammals, and/or human conveance but specific dispersal agents have not been identified." 707 Propagules dispersed b other animals (externall) Cit of Gold Coast Environmental weed fact sheets [Ants ma be attracted to pulp on seeds] "Dispersal mechanisms - Easter Cassia. cultivated-humans, rubbish dumping especiall persistent fruit pods, [Accessed 20 Jun rodents, ants, water" 2016] [Pulp ma contribute to ant disperal] "Pods pendulous, chartaceous, clindrical or compressed-clindrical, straight or slightl curved, often portions sterile and then variabl distorted, 7-18 cm long, tardil or not dehiscent, the meso carp and exocarp separating when fruit full ripe, the cavit with membranous interseminal septa. Seeds in 1-2 rows, brown, smooth and gloss or dull, obliquel obovoid, perpendicular to capsule axis, embedded in copious or scant pulp, mm long, without an areole." 708 Propagules survive passage through the gut Langeland, K.A. & Burks, K.C. (eds.) Identification and Biolog of Non-Native Plants in Florida's Natural Areas. UF/IFAS Distribution, Gainesville, FL [Unknown. Possible that seeds consumed b browsing animals ma survive gut passage] "Seeds ma be dispersed b birds, mammals, and/or human conveance but specific dispersal agents have not been identified." 801 Prolific seed production (>1000/m2) Langeland, K Merr Christmas Senna. Wildland Weeds 7(1): Langeland, K.A. & Burks, K.C. (eds.) Identification and Biolog of Non-Native Plants in Florida's Natural Areas. UF/IFAS Distribution, Gainesville, FL Csurhes, S. & Edwards, R Potential environmental weeds in Australia: Candidate species for preventative control. Biodiversit Group, Environment Australia, Canberra, Australia "Christmas senna produces flowers from October through Januar. Large numbers of seeds are produced, which mature through the spring and summer." "Flowers in late fall to earl winter, producing numerous seeds in each pod (Isel 1990)." "Senna pendula is a small South American shrub (2-5m) which produces masses of bright ellow flowers in March/April, followed b hundreds of pods each containing 5-10 seeds." 802 Evidence that a persistent propagule bank is formed (>1 r) "Seed production is prolific and the long-lived seeds are dispersed b water and soil movement" [Longevit of seeds unknown] Page 12 of 15

13 Cit of Gold Coast Environmental weed fact sheets - Easter Cassia. "Viabilit 10 ears" Well controlled b herbicides Langeland, K Merr Christmas Senna. Wildland Weeds 7(1): Motooka, P., Castro, L., Nelson, D., Nagai, G. & Ching,L Weeds of Hawaii's Pastures and Natural Areas: An Identification and Management Guide. CTAHR, UH Manoa, Honolulu, HI "Christmas senna can be controlled b foliar or basal bark herbicide application. The following foliar applications on a spra-to-wet basis have been found effective: 1.0% Roundup Pro, 0.5% Garlon 3A % Induce, 0.50 oz/gal Escort % Induce, 3.13% Brush-B- Gon. Basal bark application of 10% Garlon 4 in oil is used b the Southwest Florida Water Management District (Mack Sweat, 2003 personal communication)." "Larger plants are cut and the cut stumps treated with herbicide. Foliar spras are most effective on seedlings and on fresh regrowth" "Management: Based on work with other sennas, probabl sensitive to dicamba and triclopr and tolerant of MCPA." 804 Tolerates, or benefits from, mutilation, cultivation, or fire Langeland, K.A. & Burks, K.C. (eds.) Identification and Biolog of Non-Native Plants in Florida's Natural Areas. UF/IFAS Distribution, Gainesville, FL Kubiak, P. J Fire responses of bushland plants after the Januar 1994 wildfires in northern Sdne. Cunninghamia, 11(1): "The plant resprouts from the base after damage" [Recovers from freezing & pruning] "Hard north of the frost line; will come back if tops killed b freezing (Maxwell and Maxwell 1961). Grows easil once established (Nelson 1996). Quite salt tolerant; does well in sand soil; needs pruning regularl to contain sprawl (Maxwell and Maxwell 1961)." R = majorit of adult plants resprouted after the fires Page 13 of 15

14 805 Effective natural enemies present locall (e.g. introduced biocontrol agents) Motooka, P., Castro, L., Nelson, D., Nagai, G. & Ching,L Weeds of Hawaii's Pastures and Natural Areas: An Identification and Management Guide. CTAHR, UH Manoa, Honolulu, HI n [Presumabl No] "Distribution: Native of tropical and subtropical Americas. Now widel distributed as an ornamental and naturalized. In Hawai i, common in lowland pastures and other disturbed areas including dr zones such as Kona and Molokaÿi and wetter areas such as Hana, Maui, and east Kauaÿi. Not recorded on Ni ihau. Senna pendula Environmental impact: Forms dense stands in pastures and other disturbed areas. Seem to be more of a problem in drier areas." [Presumabl No] "in Hawai'i cultivated and naturalized at low elevations often in dr, disturbed areas, m, documented from all of the main islands except Ni'ihau and Kaho'olawe" Page 14 of 15

15 Summar of Risk Traits: High Risk / Undesirable Traits Thrives in tropical climates Widel naturalized, including all main Hawaiian Islands Disturbance weed of pastures & natural environment Other Senna species are invasive Tolerates man soil tpes Forms dense stands Reproduces b seeds Seeds dispersed b water, ants, rodents, soil movement, dumped garden waste & intentionall b people Prolific seed production Seeds form a persistent seed bank Able to coppice & resprout after cutting, pruning or fire Low Risk Traits Unarmed (no spines, thorns or burrs) Palatable to browsing & grazing animals Non-toxic Ornamental Not reported to spread vegetativel Herbicides provide effective control Page 15 of 15