Scientific names: Z
- Zantedeschia aethiopica
- Zantedeschia rehmannii
- Zanthoxylum simulans
- Zea mays
- Zelkova carpinifolia
- Zelkova serrata
- Zephyranthes candida
- Zephyranthes grandiflora
- Zigadenus elegans
- Zigadenus venenosus
- Zingiber spectabilis
- Zinnia angustifolia
- Zinnia angustifolia 'Amulette Orange'
- Zinnia angustifolia 'Profusion Apricot'
- Zinnia angustifolia 'Profusion Cherry'
- Zinnia angustifolia 'Profusion Orange'
- Zinnia angustifolia 'Profusion White'
- Zinnia elegans
- Zinnia elegans 'Benarys Riesen'
- Zinnia elegans 'Dreamland Mix'
- Zinnia elegans 'Golden Dawn'
- Zinnia elegans 'Magellan Orange'
- Zinnia elegans 'Oklahoma Pink'
- Zinnia elegans 'Oklahoma Salmon'
- Zinnia elegans 'Oklahoma Scharlach'
- Zinnia elegans 'Queen Lime'
- Zinnia elegans 'Queen Orange'
- Zinnia elegans 'Scarlet Flame'
- Zinnia elegans 'Swizzle Cherry and Ivory'
- Zinnia elegans 'Swizzle Scarlet and Yellow'
- Zinnia haageana 'Aztec Sunset'
- Zinnia haageana 'Old Mexico'
- Zinnia marylandica 'Double Zahara Fire'
- Zinnia peruviana
- Zinnia violacea
- Zinnia violacea 'Benarys Riesen'
- Zinnia violacea 'Dreamland Mix'
- Zinnia violacea 'Golden Dawn'
- Zinnia violacea 'Magellan Orange'
- Zinnia violacea 'Oklahoma Pink'
- Zinnia violacea 'Oklahoma Salmon'
- Zinnia violacea 'Oklahoma Scharlach'
- Zinnia violacea 'Queen Lime'
- Zinnia violacea 'Queen Orange'
- Zinnia violacea 'Scarlet Flame'
- Zinnia violacea 'Swizzle Cherry and Ivory'
- Zinnia violacea 'Swizzle Scarlet and Yellow'
- Zizia aurea
- Ziziphus jujuba 'Da Baizao'
- Ziziphus jujuba 'Lang'
- Ziziphus jujuba 'Meimizao'