| 1968 |
Revised the rye grasses (Poaceae: Lolium). |
| 1969 |
Identified deadly poisonous Abrus precatorius seeds in jewelry, causing U.S. Food and Drug Administration to stop importation, interstate movement, and sale of these seeds. |
| 1973 |
Identified seeds using an interactive computer |
| 1975 |
Made service identifications of papaveraceous seeds and fruits using an interactive computer. |
| 1977 |
Circumscribed alfalfa (Medicago sativa) subspecies by legume-flower characters. |
| 1977 |
Published checklist of approximately 3,000 vascular plants important to agriculture. |
| 1979 |
Revised vetches of North America (Fabaceae: Vicia). |
| 1980 |
Described seeds and fruits of Papaveraceae and Fumariaceae. |
| 1980 |
Published vascular flora of Washington County, Mississippi. |
| 1983 |
Published nomenclator of all legume (Fabaceae) genera. |
| 1984 |
Described seeds and fruits of subfamily Mimosoideae (Fabaceae). |
| 1986 |
Published revised checklist of about 3,300 vascular plants important to agriculture. |
| 1987 |
Revised Australian Paniceae (Poaceae). |
| 1987 |
Monographed the neotropical water lilies (Nymphaceae: Nymphaea subgenus Hydrocallis). |
| 1988 |
Described disseminules of Federal Noxious Weeds. |
| 1989 |
Revised New World genera of Paniceae (Poaceae). |
| 1990 |
Published nomenclator of legume (Fabaceae) species important to agriculture. |
| 1991 |
Described seeds and fruits of subfamily Caesalpinioideae (Fabaceae). |
| 1991 |
Revised Old World genera of Paniceae (Poaceae). |
| 1992 |
Published families and genera of seed plants recognized by ARS. |
| 1993 |
Monographed cucumbers and melons (Cucurbitaceae: Cucumis). |
| 1994 |
Revised the genus Cucumella (Cucurbitaceae). |
| 1996 |
Published scientific names of vascular plants in commercial seed trade. |
| 1997 |
Made available on-line information on the nomenclature of economic vascular plants. |
| 1998 |
Completed manual for identification of legume seeds. |
| 1998 |
Developed a worldwide checklist for all Lotus species with their geographic distributions. |
| 1999 |
Published standard reference World Economic Plants. |
| 2000 |
Created online reference to GRIN economic plant data. |
| 2000 |
Created online reference to GRIN federal and state noxious weed data. |
| 2000 |
Published online database of fruits and seeds of all legume genera. |
| 2000 |
Published Flora of USDA's Henry A. Wallace Beltsville (Maryland) Agricultural Research Center (BARC). |
| 2001 |
Made available online edition of the International Seed Testing Association (ISTA) list of stabilized plant names. |
| 2002 |
Created online nomenclature checker for comparing lists of scientific names to GRIN. |
| 2003 |
Made available, via the Internet, updated online database of fruits and seeds of all legume genera. |
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