TAXON: Dombeya ×cayeuxii André SCORE: -7.0 RATING: Low Risk Taxon: Dombeya ×cayeuxii André Family: Malvaceae Common Name(s): Mexican rosetree Synonym(s): pink snowball pink-ball dombeya pompomtree Assessor: Chuck Chimera Status: Assessor Approved End Date: 6 Dec 2017 WRA Score: -7.0 Designation: L Rating: Low Risk Keywords: Large Shrub, Tropical, Ornamental, Hybrid, Infertile Qsn # Question Answer Option Answer 101 Is the species highly domesticated? y=-3, n=0 n 102 Has the species become naturalized where grown? 103 Does the species have weedy races? Species suited to tropical or subtropical climate(s) - If 201 island is primarily wet habitat, then substitute "wet (0-low; 1-intermediate; 2-high) (See Appendix 2) High tropical" for "tropical or subtropical" 202 Quality of climate match data (0-low; 1-intermediate; 2-high) (See Appendix 2) Low 203 Broad climate suitability (environmental versatility) y=1, n=0 n Native or naturalized in regions with tropical or 204 y=1, n=0 y subtropical climates Does the species have a history of repeated introductions 205 y=-2, ?=-1, n=0 y outside its natural range? 301 Naturalized beyond native range y = 1*multiplier (see Appendix 2), n= question 205 n 302 Garden/amenity/disturbance weed n=0, y = 1*multiplier (see Appendix 2) n 303 Agricultural/forestry/horticultural weed n=0, y = 2*multiplier (see Appendix 2) n 304 Environmental weed n=0, y = 2*multiplier (see Appendix 2) n 305 Congeneric weed 401 Produces spines, thorns or burrs y=1, n=0 n 402 Allelopathic 403 Parasitic y=1, n=0 n 404 Unpalatable to grazing animals 405 Toxic to animals y=1, n=0 n 406 Host for recognized pests and pathogens 407 Causes allergies or is otherwise toxic to humans y=1, n=0 n 408 Creates a fire hazard in natural ecosystems y=1, n=0 n Creation Date: 6 Dec 2017 (Dombeya ×cayeuxii André) Page 1 of 14 TAXON: Dombeya ×cayeuxii André SCORE: -7.0 RATING: Low Risk Qsn # Question Answer Option Answer 409 Is a shade tolerant plant at some stage of its life cycle y=1, n=0 n Tolerates a wide range of soil conditions (or limestone 410 y=1, n=0 y conditions if not a volcanic island) 411 Climbing or smothering growth habit y=1, n=0 n 412 Forms dense thickets y=1, n=0 n 501 Aquatic y=5, n=0 n 502 Grass y=1, n=0 n 503 Nitrogen fixing woody plant y=1, n=0 n Geophyte (herbaceous with underground storage organs 504 y=1, n=0 n -- bulbs, corms, or tubers) Evidence of substantial reproductive failure in native 601 y=1, n=0 n habitat 602 Produces viable seed y=1, n=-1 n 603 Hybridizes naturally 604 Self-compatible or apomictic 605 Requires specialist pollinators 606 Reproduction by vegetative fragmentation 607 Minimum generative time (years) Propagules likely to be dispersed unintentionally (plants 701 y=1, n=-1 n growing in heavily trafficked 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 705 Propagules water dispersed y=1, n=-1 n 706 Propagules bird dispersed y=1, n=-1 n 707 Propagules dispersed by other animals (externally) y=1, n=-1 n 708 Propagules survive passage through the gut y=1, n=-1 n 801 Prolific seed production (>1000/m2) y=1, n=-1 n Evidence that a persistent propagule bank is formed (>1 802 y=1, n=-1 n yr) 803 Well controlled by herbicides 804 Tolerates, or benefits from, mutilation, cultivation, or fire y=1, n=-1 y Effective natural enemies present locally (e.g. introduced 805 biocontrol agents) Creation Date: 6 Dec 2017 (Dombeya ×cayeuxii André) Page 2 of 14 TAXON: Dombeya ×cayeuxii André SCORE: -7.0 RATING: Low Risk Supporting Data: Qsn # Question Answer 101 Is the species highly domesticated? n Source(s) Notes [An artificial hybrid, but not highly domesticated] "This species is considered to be a hybrid between Dombeya mastersii and D. Kunkel, G. 1978. Flowering Trees in Subtropical Gardens. wallichii but is often (wrongly) cited under the latter name. The Dr. W. Junk b.v., Publishers, The Hague - Boston - London mentioned parents are supposed to be native in Madagascar and tropical East Africa (Barrett)." 102 Has the species become naturalized where grown? Source(s) Notes WRA Specialist. 2017. Personal Communication NA 103 Does the species have weedy races? Source(s) Notes WRA Specialist. 2017. Personal Communication NA Species suited to tropical or subtropical climate(s) - If 201 island is primarily wet habitat, then substitute "wet High tropical" for "tropical or subtropical" Source(s) Notes "This species is considered to be a hybrid between Dombeya Kunkel, G. 1978. Flowering Trees in Subtropical Gardens. mastersii and D.wallichii but is often (wrongly) cited under the latter Dr. W. Junk b.v., Publishers, The Hague - Boston - London name. The mentioned parents are supposed to be native in Madagascar and tropical East Africa (Barrett)." 202 Quality of climate match data Low Source(s) Notes [No native range] "This species is considered to be a hybrid between Kunkel, G. 1978. Flowering Trees in Subtropical Gardens. Dombeya mastersii and D.wallichii but is often (wrongly) cited under Dr. W. Junk b.v., Publishers, The Hague - Boston - London the latter name. The mentioned parents are supposed to be native in Madagascar and tropical East Africa (Barrett)." Creation Date: 6 Dec 2017 (Dombeya ×cayeuxii André) Page 3 of 14 TAXON: Dombeya ×cayeuxii André SCORE: -7.0 RATING: Low Risk Qsn # Question Answer 203 Broad climate suitability (environmental versatility) n Source(s) Notes Kunkel, G. 1978. Flowering Trees in Subtropical Gardens. "it grows best in more temperate climates." Dr. W. Junk b.v., Publishers, The Hague - Boston - London Desert Tropicals. 2017. Pink Ball Dombeya. http://www.desert- "USDA: 10-11" tropicals.com/Plants/Sterculiaceae/Dombeya_cayeuxii.ht ml. [Accessed 5 Dec 2017] Jarrett, A. 2003. Ornamental Tropical Shrubs. Pineapple "Zone{s): 9-11" Press Inc., Sarasota, FL Native or naturalized in regions with tropical or 204 y subtropical climates Source(s) Notes [Artificial hybrid. Parent species from tropical regions] "This species is considered to be a hybrid between Dombeya mastersii and D. Kunkel, G. 1978. Flowering Trees in Subtropical Gardens. wallichii but is often (wrongly) cited under the latter name. The Dr. W. Junk b.v., Publishers, The Hague - Boston - London mentioned parents are supposed to be native in Madagascar and tropical East Africa (Barrett)." Does the species have a history of repeated 205 y introductions outside its natural range? Source(s) Notes Soderholm, P. K. (1967). Evaluation of Dombeya intro "D. x cayeuxii Andre, P. I. 19897, was introduced by the U. S. ductions for new ornamentals for Florida. In Proc. Fla. Department of Agriculture from Madeira in 1907 and again from State Hort. Soc. 80: 477-480 Cuba in 1935 as P. I. 110682." Imada, C.T., Staples, G.W. & Herbst, D.R. 2005. Annotated "Locations: Checklist of Cultivated Plants of Hawai͚i. Foster Botanical Garden (Confirmed) http://www2.bishopmuseum.org/HBS/botany/cultivatedp Ho͚omaluhia Botanical Garden lants/. [Accessed 5 Dec 2017] Waimea Arboretum & Botanical Garden" "Regional This plant has been said to grow in the following regions: Dave's Garden. 2017. Tropical Hydrangea, Pink-Ball. North Port, Florida Dombeya x cayeuxii. Orlando, Florida https://davesgarden.com/guides/pf/go/195298/. Saint Petersburg, Florida [Accessed 6 Dec 2017] Hawaiian Paradise Park, Hawaii Hilo, Hawaii" Bishop Museum. 2017. Dombeya Xcayeuxii André. 17 specimens in collections (15 from the Hawaiian Islands, 2 from http://nsdb.bishopmuseum.org/TaxonName/1163660896 French Polynesia). All apparently cultivated. #. [Accessed 5 Dec 2017] Negi, P. S., & Hajra, P. K. 2007. Alien flora of Doon Valley, Cultivated in India Northwest Himalaya. Current Science 92(7): 968-978 301 Naturalized beyond native range n Source(s) Notes Creation Date: 6 Dec 2017 (Dombeya ×cayeuxii André) Page 4 of 14 TAXON: Dombeya ×cayeuxii André SCORE: -7.0 RATING: Low Risk Qsn # Question Answer "Dombeya x cayeuxii ... References: India-N-976." [Cites Negi & Randall, R.P. (2017). A Global Compendium of Weeds. 3rd Hajra, P. (2007) for evidence of naturalization. However, the cited Edition. Perth, Western Australia. R.P. Randall reference does not confirm that this species is naturalized] "Naturalized and widely cultivated exotics are marked by asterisks in Negi, P. S., & Hajra, P. K. 2007. Alien flora of Doon Valley, the enumeration." ... "Table 1. Exotics of the Doon Valley" [Dombeya Northwest Himalaya. Current Science 92(7): 968-978 cayuseii included in table, but not marked with an asterisk] Imada, C. 2012. Hawaiian Native and Naturalized Vascular Plants Checklist (December 2012 update). Bishop Musem No evidence Technical Report 60. Bishop Museum, Honolulu, HI Wagner, W.L., Herbst, D.R.& Lorence, D.H. 2017. Flora of the Hawaiian Islands. Smithsonian Institution, No evidence to date Washington, D.C. http://botany.si.edu/. [Accessed 5 Dec 2017] 302 Garden/amenity/disturbance weed n Source(s) Notes "Dombeya cayeuxii ... References: India-W" [Cited as a weed in IUCN (2017) Global Register of Introduced and Invasive Species (GRIIS) Randall, R.P. (2017). A Global Compendium of Weeds. 3rd IUCN SSC Invasive Species Specialist Group. URL: http://griis.org/. Edition. Perth, Western Australia. R.P. Randall This website cites Negi & Hajra (2007), and does not indicate that the species is a weed. The website further states that there is no evidence of impacts reported for this species] Global Register of Introduced and Invasive Species. 2017. Dombeya cayeuxii. http://griis.org/. [Accessed 5 Dec Evidence of Impacts (Y/N) = No 2017] 303 Agricultural/forestry/horticultural weed n Source(s) Notes Randall, R.P.