Cattleya hybrids, lavendar, Armacost & Royston cut flower greenhouse, Program 8 slide 33, no date on slide
Cattleya hybrids, white, Armacost & Royston cut flower greenhouse, Program 8 slide 34, no date on slide
Cattleya semi-alba hybrids, group, Program 8 slide 4, duplicate slide made in January 1969
Seedling house, Armacost & Royston, July 1969, roll 196907 slide 20
Seedling house, Armacost & Royston, July 1969, roll 196907 slide 21
