St. John 19
3190 Maile Way
Honolulu, HI 96822

Phone: (808) 956-8909

Fax: (808) 956-3894

Email: leonhard@hawaii.edu

Kenneth W. Leonhardt

Specialist  

Specialties:

Ornamental crops, with emphasis on Protea and landscape trees.

Education:

Ph.D., Horticulture, University of Hawaii at Manoa, HI 1977;
M.S., Horticulture, University of Hawaii at Manoa, HI 1973;
B.S., Horticulture, California State Polytechnic University, Pomona, CA. 1971;
HS, Royal Oak, Covina, CA. 1968

Research Interests:

Developing improved varieties of ornamental plants for commercial producers.

For more details and trivia

Courses taught

TPSS 200, Tropical Crop Production 36 years (14 yrs as writing intensive)
TPSS 364, Horticulture Practices, 1 year
TPSS 402, Flower and Foliage Crop Production, 2 years
TPSS 492, Internship (writing intensive), 11 years
TPSS 664, Orchidology, 1 year
TPSS 499, directed studies, most semesters
TPSS 699, directed research, most semesters
 
Graduate Student Committees (since 2006)
David Lingenfelser, MS, 2012, Chair
Robert Saito, MS, 2012, Chair
Sterling Thomas, MS, 2012
Liz Huppman, PhD, 2012
Huang Yu, PhD, 2012
Peter Wiggins, MS, 2011
Tilden Miguel, MS, 2010, Chair
Will Rehrig MS, 2008
Emily Teng, MS, 2007, Chair
Thomas Littleton, MS, 2007, Chair
Hideko Kasahara, MS, 2007
Susana Vanzie-Canton, MS, 2006, Chair
 
Memberships
International Society for Horticulture (ISHS)
Chairman, International Protea Working Group (IPWG), 2002-2010

Selected Publications:

  • Miguel, T.P. and K.W. Leonhardt. 2011. In Vitro Polyploid induction of orchids using oryzalin. Scientia Horticulturae. 130: 314-319.
  • Leonhardt, K.W. and X. Shi. 2009. Production of tetraploid forms of eight landscape tree species. VI Internl Symposium on New Floricultural Crops, ISHS. Madeira, Portugal. Acta Hort. 813: 133-139.
  • Teng, E.S. and K.W. Leonhardt. 2009. Optimum irradiation dosage of unrooted Dracaena cuttings for mutation induction. VI Internl Symposium on New Floricultural Crops, ISHS. Madeira, Portugal. Acta Hort. 813: 517- 522.
  • Teng, E.S. and K.W. Leonhardt. 2009. In vitro and in vivo polyploidization of Dracaena with oryzalin. VI Internl Symposium on New Floricultural Crops, ISHS. Madeira, Portugal. Acta Hort. 813: 509-515.
  • Vanzie-Canton, S.D. and K.W. Leonhardt. 2009. In vivo polyploidzation of Zamioculcas zamiifolia. VI Internl Symposium on New Floricultural Crops. ISHS. Madeira, Portugal. Acta Hort. 813: 531-537.
  • Vanzie-Canton, S.D. and K.W. Leonhardt. 2009. Polyploidization of Marsdenia floribunda. VI Internl Symposium on New Floricultural Crops. ISHS. Madeira, Portugal. Acta Hort. 813: 523-529.
  • Vanzie-Canton, S.D. and K.W. Leonhardt. 2009. In vitro callus induction and plantlet regeneration protocol development for the oryzalin treatment of Zamioculcas zamiifolia. VI Internl Symposium on New Floricultural Crops. ISHS. Madeira, Portugal. Acta Hort. 813: 201-207.
  • Leonhardt, K.W., T.E. Littleton and M.G. Wright. 2008. Evaluation of Leucospermum hybrids for warm-temperature tolerance. VIII International Protea Research Symposium. ISHS. San Diego, California. Acta Hort. 805: 81-91.
  • Criley, R. A., K.W. Leonhardt, D. Oka and P. Shingaki. 2008. Extending the flowering period of Leucospermum hybrids through disbudding. Acta. Hort. 766: 183-186.
  • Leonhardt, K.W., P. Shingaki, P. Nakao and D. Oka. 2005. Screening for Warm-Temperature Tolerant Leucospermum (Proteaceae) Hybrids for Cultivation in Low-Elevation Climates in Hawaii. Acta Hort. Vol. 683: 223- 232. CTAHR J. Ser. No. 4658.
  • List of publications (PDF)