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Identification of Disseminuies Listed in the Federal Noxious Weed

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Identification of Disseminuies Listed in the Federal Noxious Weed s /^p'i^^ ^5a^ United States C • ^ fá JLJjl Department of ^¡EdiJ Agriculture Identification of Disseminuies Agricultural Research Listed in the Federal Service Technical Noxious Weed Act Bulletin Number 1719 Abstract Gunn, Charles R., and Carole A. Ritchie. 1988. iden- tification of disseminules listed in the Federal Noxious Weed Act. U.S. Department of Agriculture, Technical Bulletin No. 1719,313 p. Accurate identification of dissenninules (seeds and one- seeded fruits) listed or to be listed in the Federal Noxious Weed Act is required of U.S. Department of Agriculture personnel and other agricultural scientists. This bulle- tin provides relevant information on their identification. New data presented also increase our knowledge of relationships of these weeds to other weeds and crops of concern to agriculture. Data are derived from exten- sive sampling of the disseminules of Federal noxious weeds. Selected illustrated characters facilitate the location of families of unknown disseminules in the catalog. Keywords: Federal noxious weeds, fruit, seed. ^üZ^^To^ Identification of Disseminules Agriculture ■-■ ■- ■■ ^ I l Agicuiura, Listcd 111 tHo Fcderal 5f Noxious Weed Act Technical Bulletin Number 1719 _3 täy Charles R. Gunn Carole A. Ritchie EXCHANGE Rec'd FEB 11989 Trade names are used in this publication solely for the purpose of providing specific information. Mention of a trade name does not constitute a guarantee or warranty of the product by the U.S. Department of Agriculture or an endorsement by the Department over other products not mentioned. Copies of this publication may be purchased from the National Technical Information Service, 5285 Port Royal Road, Springfield, Va. 22161. ARS has no additional copies for free distribution. Issued July 1988 Acknowledgments We express our appreciation to the following associates Ram, Jerusalem, Israel; Alicia Lourteig, Laboratoire de and correspondents who supplied fruits, seeds, or infor- Phanerogamie, Museum National d'Histoire Naturelle, mation: S.C.H. Barrett, Department of Botany, Univer- Paris, France; Les Pedley, Queensland Herbarium, sity of Toronto, Toronto, Canada; David Bates, Liberty Department of Primary Industries, Indooroopilly, Hyde Bailey Hortorium, Cornell University, Ithaca, NY; Australia; Robert E. Perdue, Jr., Germplasm Introduc- B.R. Baum, Vascular Plant Herbarium, Biosystematics tion and Evaluation Laboratory, ARS, USDA, Beltsville, Research institute, Ottawa, Canada; D. Bedford, Herbar- MD; Roger M. Polhill, Royal Botanic Gardens Herbar- ium, Royal Botanic Gardens, Sydney, Australia; E. ium, Kew, England; Peter H. Raven, Missouri Botanical Arthur Bell and Derek Clayton, Royal Botanic Gardens Garden, St. Louis, MO; Calvin R. Sperling, Herbaria, Herbarium, Kew, Richmond, Surrey, England; C.D.K. Harvard University, Cambridge, MA; Thomas M. Cook, Botanischer Garten und Institut fur Systematische Watanabe, Department of Agriculture, Honolulu, HI; Botanik der Universität Zurich, Zurich, Switzerland; Randy Westbrooks, Whiteville Methods Development Frances Davies, Royal Botanic Gardens Herbarium, Center, Animal and Plant Health Inspection Service Kew, England; Bernard De Winter, Botanical Research (APHIS), USDA, Whiteville, NO. Institute, Pretoria, South Africa; James Duke, Germplasm Introduction and Evaluation Laboratory, Agricultural We also express our appreciation to James A. Lackey, Research Service, U.S. Department of Agriculture (ARS, Plant Protection and Quarantine, APHIS, USDA, USDA), Beltsville, MD; Edith Gomez-Sosa, Instituto de Hyattsville, MD, who wrote most of the introductory Botánico Darwinion, San Isidro, Argentina; C.C. Heyn, text, Lynda E. Chandler of Wooster, OH, who did most Department of Botany, Hebrew University of Jerusalem, of the disseminule illustrations, and Karen Parker of Jerusalem, Israel; Leroy Holm (retired), Agronomy Laurel, MD, who did about 50 disseminule drawings. Department, University of Wisconsin, Madison, Wl; Both dissected some seeds, prepared some of the Patricia K. Holmgren, New York Botanical Garden Her- smallest seeds for scanning electron microscopy, and barium, Bronx, NY; Stephen Hurst, Federal Seed operated the scanning electron microscope. The micro- Laboratory, Agricultural Marketing Service, USDA, graphs were used in preparing the external drawings of Beltsville, MD; Ann Liston, Department of Botany, Givat the smallest seeds. Contents Procedures 2 Euphorbiaceae 71 Liliidae 184 Disseminule morphology and Rhamnaceae 75 Pontederiaceae 184 guides to families in the Erythroxylaceae 76 Liliaceae 185 catalog 3 Malpighiaceae 76 Iridaceae 187 Catalog 13 Sapindaceae 76 Dioscoreaceae 188 Class Magnoliopsida Zygophyllaceae 77 Literature cited 189 (dicotyledonous plants) 14 Oxalidaceae 77 Appendix 1: Studied species Magnoliidae 14 Geraniaceae 78 listed by families 191 Annonaceae 14 Apiaceae 78 Appendix II: Studied species Piperaceae 14 Asteridae 81 listed by country, region, or Aristolochiaceae 14 Loganiaceae 81 State of origin 211 Nymphaeaceae 15 Gentianaceae 81 Scientific name index 306 Berberidaceae 15 Apocynaceae 81 Menispermaceae 16 Asclepiadaceae 82 Papaveraceae 16 Solanaceae 82 Fumariaceae 17 Convolvulaceae 85 Hamamelidae 18 Cuscutaceae 88 Ulmaceae 18 Menyanthaceae 89 Urticaceae 18 Hydrophyllaceae 89 Myricaceae 18 Boraginaceae 90 Caryophyllidae 19 Verbenaceae 92 Phytolaccaceae 19 Lamiaceae 93 Nyctaginaceae 19 Scrophulariaceae 97 Aizoaceae 20 Orobanchaceae 101 Cactaceae 21 Acanthaceae 102 Chenopodiaceae 21 Bignoniaceae 106 Amaranthaceae 22 Lentibulariaceae 107 Portulacaceae 25 Campanulaceae 107 Basellaceae 25 Rubiaceae 108 Caryophyllaceae 26 Dipsacaceae 112 Polygonaceae 28 Asteraceae 112 Dilleniidae 32 Class Liliopsida Elatinaceae 32 (monocotyledonous plants) 137 Clusiaceae 32 Alismatidae 137 Tiliaceae 32 Butomaceae 137 Sterculiaceae 33 Alismataceae 137 Malvaceae 34 Hydrocharitaceae 138 Passifloraceae 35 Aponogetonaceae 140 Cucurbitaceae 35 Potamogetonaceae 141 Capparaceae 37 Najadaceae 142 Brassicaceae 37 Arecidae 143 Ebenaceae 40 Arecaceae 143 Rosidae 41 Araceae 143 Rosaceae 41 Lemnaceae 144 Fabaceae 42 Commelinidae 145 Proteaceae 64 Commelinaceae 145 Haloragaceae 64 Eriocaulaceae 147 Lythraceae 65 Juncaceae 147 Myrtaceae 66 Cyperaceae 148 Onagraceae 68 Poaceae 155 Melastomataceae 69 Sparganiaceae 182 Combretaceae 69 Typhaceae 182 Santalaceae 70 Zingiberidae 183 Icacinaceae 70 Bromeliaceae 183 Dichapetalaceae 71 Heliconiaceae 183 Identification of Disseminules Listed in the Federal Noxious Weed Act by Charles R. Gunn and Carole A. Ritchie^ Weeds may be the most important plant pests in U.S. includes 76 taxa. It also proposed adding weeds listed agriculture. Based on a survey, 84 percent of all in Gunn and Ritchie's report (1982). This list is the pesticides applied to the top 10 crops are herbicides; basis for weed seeds discussed in this bulletin. yield loss is estimated at $13 billion and control costs are $8 billion annually. Unlike other plant pests, such Enforcement of the FNWA is the responsibility of as insects and pathogens, weeds rarely show obvious APHIS, whose officers are stationed at U.S. ports of physical signs of harm to the crop. Consequently, they entry, foreign sites, and domestic locations. Their are usually given less than their deserved consideration. assignment is to prevent movement of exotic noxious weeds, as seeds or any other plant part, into the United Williams (1980)^ showed that nnost of the econonn- States. Until now, they have used Justice and Musil ically innportant weeds in U.S. agriculture are of (1952), Reed and Hughes (7977), and similar references foreign or exotic origin. Many were introduced to identify seeds. early in the European settlennent of this country and now are widespread and difficult to eradicate. The purpose of this bulletin is to provide an accurate and rapid method of identifying these 846 exotic noxious Based on the atlas of Holm et al. (7979), Gunn and Ritchie weed seeds. The illustrated catalog is the backbone of (1982) listed 846 serious and principal weeds of exotic the work. Several illustrated character lists enable the origin not found or not widely prevalent in the United users to have easy access to it. States. It is this threat of new exotic weeds that led to passage of the Federal Noxious Weed Act (FNWA). The scientific names of the exotic noxious weeds are Final selection of weeds for the FNWA regulation was presented by their family names in Appendix I and by made by the Technical Committee to Evaluate Noxious their country, region, or State (for Hawaii) of origin in Weeds. This committee comprises scientists from three Appendix II. The origin data were derived from Holm et U.S. Department of Agriculture (USDA) agencies- al. (7979) and supplemented by Holm et al. (7977). Like Agricultural Marketing Service (AMS), Agricultural Holm et al. (7979), we have treated Hawaii as an "exotic Research Service (ARS), and Animal and Plant Health region or country," not as one of the 50 U.S. States, Inspection Service (APHIS)—universities, and the Weed because its noxious weeds are unlike those of the Science Society of America. The committee developed other 49 States. the current list of weeds in the FNWA regulation, which "•Respectively, research botanist, Systematic Botany, Mycology, and Nematology Labora- tory, Agricultural Research Service, Beltsville Agricultural Research Center, Beltsville, MD 20705, and freelance botanist, Laurel, MD 20708. ^The year in parentheses after the author's name refers to Literature Cited, p. 189. Procedures Critical disseminules
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