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WRA Species Report Family: Apocynaceae Taxon: Acokanthera schimperi (A. DC.) Benth. & Hook. f. ex Schweinf. Synonym: Acokanthera ouabaio Cathel. ex L. Lewin Common Name: arrow-poison-tree Carissa schimperi A. DC. (basionym) common-poisonbush Questionaire : current 20090513 Assessor: Patti Clifford Designation: EVALUATE Status: Assessor Approved Data Entry Person: Patti Clifford WRA Score 6 101 Is the species highly domesticated? y=-3, n=0 n 102 Has the species become naturalized where grown? y=1, n=-1 103 Does the species have weedy races? y=1, n=-1 201 Species suited to tropical or subtropical climate(s) - If island is primarily wet habitat, then (0-low; 1-intermediate; 2- High substitute "wet tropical" for "tropical or subtropical" high) (See Appendix 2) 202 Quality of climate match data (0-low; 1-intermediate; 2- High high) (See Appendix 2) 203 Broad climate suitability (environmental versatility) y=1, n=0 y 204 Native or naturalized in regions with tropical or subtropical climates y=1, n=0 y 205 Does the species have a history of repeated introductions outside its natural range? y=-2, ?=-1, n=0 n 301 Naturalized beyond native range y = 1*multiplier (see n Appendix 2), n= question 205 302 Garden/amenity/disturbance weed n=0, y = 1*multiplier (see n Appendix 2) 303 Agricultural/forestry/horticultural weed n=0, y = 2*multiplier (see n Appendix 2) 304 Environmental weed n=0, y = 2*multiplier (see n Appendix 2) 305 Congeneric weed n=0, y = 1*multiplier (see n Appendix 2) 401 Produces spines, thorns or burrs y=1, n=0 n 402 Allelopathic y=1, n=0 403 Parasitic y=1, n=0 n 404 Unpalatable to grazing animals y=1, n=-1 405 Toxic to animals y=1, n=0 y 406 Host for recognized pests and pathogens y=1, n=0 407 Causes allergies or is otherwise toxic to humans y=1, n=0 y 408 Creates a fire hazard in natural ecosystems y=1, n=0 409 Is a shade tolerant plant at some stage of its life cycle y=1, n=0 410 Tolerates a wide range of soil conditions (or limestone conditions if not a volcanic island) y=1, n=0 y 411 Climbing or smothering growth habit y=1, n=0 n Print Date: 10/9/2012 Acokanthera schimperi (Apocynaceae) Page 1 of 6 412 Forms dense thickets y=1, n=0 501 Aquatic y=5, n=0 n 502 Grass y=1, n=0 n 503 Nitrogen fixing woody plant y=1, n=0 n 504 Geophyte (herbaceous with underground storage organs -- bulbs, corms, or tubers) y=1, n=0 n 601 Evidence of substantial reproductive failure in native habitat y=1, n=0 n 602 Produces viable seed y=1, n=-1 y 603 Hybridizes naturally y=1, n=-1 604 Self-compatible or apomictic y=1, n=-1 605 Requires specialist pollinators y=-1, n=0 n 606 Reproduction by vegetative fragmentation y=1, n=-1 607 Minimum generative time (years) 1 year = 1, 2 or 3 years = 0, 4+ years = -1 701 Propagules likely to be dispersed unintentionally (plants growing in heavily trafficked y=1, n=-1 areas) 702 Propagules dispersed intentionally by people y=1, n=-1 y 703 Propagules likely to disperse as a produce contaminant y=1, n=-1 n 704 Propagules adapted to wind dispersal y=1, n=-1 n 705 Propagules water dispersed y=1, n=-1 706 Propagules bird dispersed y=1, n=-1 y 707 Propagules dispersed by other animals (externally) y=1, n=-1 n 708 Propagules survive passage through the gut y=1, n=-1 y 801 Prolific seed production (>1000/m2) y=1, n=-1 802 Evidence that a persistent propagule bank is formed (>1 yr) y=1, n=-1 n 803 Well controlled by herbicides y=-1, n=1 804 Tolerates, or benefits from, mutilation, cultivation, or fire y=1, n=-1 y 805 Effective natural enemies present locally (e.g. introduced biocontrol agents) y=-1, n=1 Designation: EVALUATE WRA Score 6 Print Date: 10/9/2012 Acokanthera schimperi (Apocynaceae) Page 2 of 6 Supporting Data: 101 2012. WRA Specialist. Personal Communication. [Is the species highly domesticated? No] No evidence of domestication that reduces invasive traits. 102 2012. WRA Specialist. Personal Communication. [Has the species become naturalized where grown? NA] 103 2012. WRA Specialist. Personal Communication. [Does the species have weedy races? NA] 201 2012. USDA ARS National Genetic Resources [Species suited to tropical or subtropical climate(s) - If island is primarily wet Program. Germplasm Resources Information habitat, then substitute "wet tropical" for "tropical or subtropical"? 2 - high] Native Network - (GRIN). http://www.ars-grin.gov/cgi- range: Djibouti; Eritrea; Ethiopia; Somalia; Kenya; Tanzania; Uganda; Rwanda; bin/npgs/html/index.pl Zaire; Yemen 202 2012. USDA ARS National Genetic Resources [Quality of climate match data? 2 - high] Native range: Djibouti; Eritrea; Ethiopia; Program. Germplasm Resources Information Somalia; Kenya; Tanzania; Uganda; Rwanda; Zaire; Yemen Network - (GRIN). http://www.ars-grin.gov/cgi- bin/npgs/html/index.pl 203 2007. Bethwell, O.O.. Acokanthera schimperi (A. [Broad climate suitability (environmental versatility)? Yes] Acokanthera schimperi DC.) Schweinf. [Internet] (Accessed Ocotber 5 occurs at the margins of dry forest, in relict forest, thickets, grasslands and 2012). PROTA (Plant Resources of Tropical bushland, at 1100–2400 m altitude and with 600–1000 mm annual rainfall. Africa/ Ressources vegetales de l'Afrique tropicale), Wageningen, Netherlands http://www.prota4u.org/protav8.asp?g=pe&p 204 2012. USDA ARS National Genetic Resources [Native or naturalized in regions with tropical or subtropical climates? Yes] Native Program. Germplasm Resources Information range: Djibouti; Eritrea; Ethiopia; Somalia; Kenya; Tanzania; Uganda; Rwanda; Network - (GRIN). http://www.ars-grin.gov/cgi- Zaire; Yemen bin/npgs/html/index.pl 205 2012. WRA Specialist. Personal Communication. [Does the species have a history of repeated introductions outside its natural range? No] No evidence. 301 2012. Randall, R.P.. A Global Compendium of [Naturalized beyond native range? No] No evidence. Weeds. 2nd Edition. Department of Agriculture and Food, Western Australia 302 2012. Randall, R.P.. A Global Compendium of [Garden/amenity/disturbance weed? No] No evidence. Weeds. 2nd Edition. Department of Agriculture and Food, Western Australia 303 2012. Randall, R.P.. A Global Compendium of [Agricultural/forestry/horticultural weed? No] No evidence. Weeds. 2nd Edition. Department of Agriculture and Food, Western Australia 304 2012. Randall, R.P.. A Global Compendium of [Environmental weed? No] No evidence. Weeds. 2nd Edition. Department of Agriculture and Food, Western Australia 305 2012. Randall, R.P.. A Global Compendium of [Congeneric weed? No] The Global Compendium of Weeds lists Acokanthera Weeds. 2nd Edition. Department of Agriculture oblongifolia as an agricultural weed. However, there is no available information on and Food, Western Australia its impacts to agriculture. 401 2007. Bethwell, O.O.. Acokanthera schimperi (A. [Produces spines, thorns or burrs? No] Much-branched, evergreen tree, DC.) Schweinf. [Internet] (Accessed Ocotber 5 sometimes a shrub, up to 9(–10) m tall, with short trunk; bark brown, soft; crown 2012). PROTA (Plant Resources of Tropical dense, rounded; young branches glabrous or hairy, conspicuously angled and Africa/ Ressources vegetales de l'Afrique ribbed. Leaves decussately opposite, simple and entire; stipules absent; petiole tropicale), Wageningen, Netherlands 1–6(–9) mm long; blade elliptical to ovate or broadly ovate, 2–10 cm × 1.5–6.5 http://www.prota4u.org/protav8.asp?g=pe&p cm, base cuneate or rounded, apex acute, obtuse or rounded, with hard mucro, leathery, glossy, glabrous or shortly hairy, pinnately veined, lateral veins obscure, with looping connections. 402 2012. WRA Specialist. Personal Communication. [Allelopathic? Unknown] 403 2012. WRA Specialist. Personal Communication. [Parasitic? No] Apocynaceae. 404 2012. WRA Specialist. Personal Communication. [Unpalatable to grazing animals? Unknown] 405 2007. Bethwell, O.O.. Acokanthera schimperi (A. [Toxic to animals? Yes] Acokanthera species are among the most commonly DC.) Schweinf. [Internet] (Accessed Ocotber 5 used plant species for the preparation of poison in East Africa. It is either used on 2012). PROTA (Plant Resources of Tropical its own or mixed with other plant or animal parts. The bark, wood and roots are Africa/ Ressources vegetales de l'Afrique the usual ingredients for arrow poison, and they are also used for suicide and tropicale), Wageningen, Netherlands homicide. The only treatment against the poison is immediate excision of the http://www.prota4u.org/protav8.asp?g=pe&p flesh around the wound, or sucking the blood from the wound. The poison is also used in killing wild animals and stray dogs from fields and homes. Print Date: 10/9/2012 Acokanthera schimperi (Apocynaceae) Page 3 of 6 406 2012. WRA Specialist. Personal Communication. [Host for recognized pests and pathogens? Unknown] 407 2007. Bethwell, O.O.. Acokanthera schimperi (A. [Causes allergies or is otherwise toxic to humans? Yes] "Acokanthera species DC.) Schweinf. [Internet] (Accessed Ocotber 5 are among the most commonly used plant species for the preparation of poison 2012). PROTA (Plant Resources of Tropical in East Africa. It is either used on its own or mixed with other plant or animal Africa/ Ressources vegetales de l'Afrique parts. The bark, wood and roots are the usual ingredients for arrow poison, and tropicale), Wageningen, Netherlands they are also used for suicide and homicide. The only treatment against the http://www.prota4u.org/protav8.asp?g=pe&p poison is immediate excision of the flesh around the wound, or sucking the blood from the wound. The poison is also used in killing wild animals and stray dogs from fields and homes. In Ethiopia the leaves and bark are applied to the skin to treat skin disorders, and an infusion of the leaves is gargled to treat tonsillitis.
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