US National Arboretum


Floral and Nursery Plants Research Unit


hydrangeaDr. Lisa Alexander
Research Geneticist
{McMinnville, TN}

Conducts research to develop, evaluate, and release improved germplasm of selected nursery crop species, including, but not limited to, Hydrangea, Osmanthus, and Callicarpa, and utilize genetic markers to accelerate the breeding process. Click here for more details



Mr. Kevin Conrad
Curator, Woody Landscape Plant Germplasm Repository
{Beltsville, MD}

Responsible for the conservation of 182 genera (over 5000 taxa) of woody landscape plants of diverse wild-origin; to establish a viable repository (Woody Landscape Plant Germplasm Repository - WLPGR) for the long term preservation of this germplasm in the form of seeds and clonal material; to transfer technology and associated information for use in research and crop improvement; and, to establish, manage, and make available collections information by electronic links between U.S. National Arboretum, National Plant Germplasm System, and the public sector. Click here for more details

April Remembered Camellia Dr. Donna Fare
Research Horticulturist
{McMinnville, TN}

Conducts a research program in nursery crop production with emphasis on identifying plant physiological constraints with nursery crops, developing improved production methods with field and container systems, and evaluate germplasm of ornamental trees and shrubs for landscape value. Click here for more details

Picture of Dr. Hammond examining virus-infectd leavesDr. John Hammond
Research Plant Pathologist
{Beltsville, MD}

Conducts research on virus diseases of ornamental crops, including identification and characterization of newly occurring viruses, resistance to virus infection and replication in transgenic plants, and virus detection and strain differentiation by serology and nucleic acid hybridization. Development of a Universal Plant Virus Microarray for detection and identification of plant viruses. Click here for more details

Picture of Xylella-infected bonsai Dr. Qi Huang
Plant Pathologist
{Beltsville, MD}

Identifies, detects, and gains a better understanding of genetic relationships and molecular basis of pathogenicity of selected bacterial pathogens to facilitate effective control of bacterial diseases of major significance to ornamental and agronomic crops. Current research interests include: conducting research on Xylella fastidiosa including genome characterization and specific detection and identification of ornamental strains, as well as genetic relationships among ornamental and non-ornamental strains of X. fastidiosa; and improving current detection and identification methods for the select agent pathogen Ralstonia solanacearum race 3 biovar 2. Click here for more details

Composite picture of geranium viruses research project Dr. Ramon Jordan
Research Plant Pathologist 
{Beltsville, MD}

Conducts research on the biochemical and biological nature of plant viruses, their genomes, and their gene products. Develops and utilizes serological and nucleic acid-based reagents and technologies for improved detection, differentiation and identification of new and emerging viruses; determines the genome organization of selected important ornamental viruses; and, develops methods and new strategies to confer virus resistance in plants through expression of antibody proteins or replicase-binding peptides in transgenic plants. Click here for more details

Picture of lily Dr. Kathryn K. Kamo
Plant Physiologist 
{Beltsville, MD}

Identifies biochemical events associated with cell division and differentiation. Studies cell, tissue and organ development and correlates biochemical changes with morphological changes leading to formation of the whole plant. Applies biotechnology to the development of floral bulb plants to make them resistant to viruses and nematodes. Click here for more details

Picture of newly released 'Old Glory' lilac cultivarDr. Margaret Pooler
Research Geneticist
{Beltsville, MD}

Conducts basic and applied research on breeding and genetics of ornamental shrubs and small trees, including flowering cherries, redbuds, and crapemyrtles, in order to develop new cultivars that are disease and pest resistant, tolerant of environmental stresses, and have superior ornamental qualities. Breeding methodologies include traditional crosses, ploidy manipulation, in-vitro techniques, as well as using molecular markers to identify hybrids or assess genetic diversity. Click here for more details

Picture of turfgrass evaluation plot Dr. Scott Warnke
Research Plant Geneticist/Physiologist
{Beltsville, MD}

Conducts research on the genetics of plants used as turfgrasses.  Identifies and develops enhanced germplasm from wild species that express improved biotic and abiotic stress resistance.  Develops improved turfgrasses through the use of new technologies such as molecular markers and genomics. Click here for more details

Picture of Dr. Whittemore during plant exploration trip Dr. Alan Whittemore
Research Plant Molecular Taxonomist
{Washington, DC}

Responsible for original molecular, biosystematic, taxonomic, and nomenclatural research on cultivated woody plants and their wild-occurring allies of potential scientific, economic, and landscape utility. Leads and joins domestic and foreign plant explorations. Responsible for, provides oversight of, and contributes actively to the growth and proper curation of the U.S. National Arboretum Herbarium. Click here for more details

Research Unit Home Page || Mission & Goals || History || Locations
Scientists & Specialties || Postdoctorals & Support Scientists || Technical & Support Staff
Recent Accomplishments || Publications & Patents || New Plant Introductions
Woody Landscape Plants Germplasm Repository || National Herbarium

 Back to the Arboretum Home Page
Arboretum Information || Events & Education || Gardens & Horticulture || Research Activities
Support the Arboretum || New Plant Introductions || USDA Plant Hardiness Zone Map || Comments
Search Our Site

Last Updated   February 9, 2017 8:02 AM