Alan W. Meerow, M. Roh, Roger S. Lawson
Eucrosia Ker Gawler is a genus of 7 species native to Ecuador and Peru in mostly seasonally dry, lowland habitats. Breeding among the species was begun in 1985. The first F1 hybrids were produced between two hysteranthous Andean desert species, E. aurantiaca (yellow-flowered) and E. eucrosioides (orange-flowered). First flowering occurred in spring, 1989, and the hybrids have been evaluated for 3–4 flowering seasons. Progeny range in flower-color from RHS yellow 7B through orange 28, with the majority classified as RHS yellow-orange 14–17. Bud counts have ranged from 9 through 35 (both parents usually hold 12–17 flowers). Sibling crosses between outstanding F1 progeny, and complex crosses between the F1 selections and Eucrosia bicolor var. plowmanii have also been produced. Hybrids between E. bicolor var. plowmanii and the closely related Rauhia multiflora have also been accomplished. The aurantiaca/eucrosioides hybrids show promise as novel cutflowers, though to be commercially viable, attempts must be made to determine how to force more than one crop annually. Complex hybrids with E. bicolor var. plowmanii will hopefully augment vegetative increase of the bulbs, and shorten generation times. Hybrids with Rauhia may be useful as novelty pot crops. Micropropagation and flowering physiology studies are planned using the outstanding selections from the various crosses.
Meerow, Alan W., Roh, M. and Lawson, Roger S. (1992). BREEDING OF EUCROSIA (AMARYLLIDACEAE) FOR CUTFLOWER AND POT PLANT PRODUCTION. Acta Hortic. 325, 555-560
DOI: 10.17660/ActaHortic.1992.325.77
flower bulbs, interspecific hybridization, Eucrosia aurantiaca, E. eucrosioides, E. bicolor

Acta Horticulturae