Plant genera

Mayweed Matricaria 2 species 28 Milkweed Asclepias 10 species 28 Oat grass Arrhenatherum 2 species 28 Elephant ear Alocasia 24 species 28 Avocado Persea 3 species 27 Dancing-lady orchid Oncidium 5 species 27 Magnolia 24 species 27 Jamesbrittenia 6 species 27 Bluebeard Caryopteris 3 species 27 Spiderwort Tradescantia 7 species 26 Desert rose Adenium 4 species 26 Cowpea Vigna 15 species 25 Linden Tilia 8 species 25 Philodendron 11 species 25 Candytuft Iberis 7 species 25 Heliotrope Heliotropium 6 species 25 Ginkgo 2 species 25 Tansy Tanacetum 9 species 24 Bristlegrass Setaria 10 species 24 Orchid Orchis 1 species 24 Amazon sword Echinodorus 6 species 24 Pampas grass Cortaderia 2 species 24 Taro Colocasia 4 species 24 Madagascar periwinkle Catharanthus 4 species 24 Pineapple Ananas 5 species 24 Thyme Thymus 12 species 23 Yew Taxus 4 species 23 Photinia 5 species 23 Star of Bethlehem Ornithogalum 5 species 23 Treasure flower Gazania 10 species 23 Savory Satureja 4 species 22 Oak Quercus 55 species 22 Lungwort Pulmonaria 8 species 22 Crocus 10 species 22 Birch Betula 15 species 22 Foxtail grass Alopecurus 6 species 22 Wood sorrel Oxalis 10 species 21 Boston fern Nephrolepis 3 species 21 Banana Musa 12 species 21 Waxflower Chamelaucium 12 species 21 Okra Abelmoschus 4 species 21 Passion flower Passiflora 33 species 20 Bird's-foot Ornithopus 5 species 20 Fennel flower Nigella 4 species 20 Privet Ligustrum 10 species 20 Avens Geum 10 species 20 Saint Dabeoc's heath Daboecia 2 species 20 Smoke tree Cotinus 3 species 20 Bistort Bistorta 4 species 20 Ardisia 6 species 20 Air plant Tillandsia 12 species 19 New Zealand flax Phormium 4 species 19 Catmint Nepeta 16 species 19 Cress Lepidium 8 species 19 Haworthiopsis 3 species 19 Goat's rue Galega 3 species 19 Montbretia Crocosmia 6 species 19 Stevia 2 species 18 Rowan Sorbus 18 species 18 Castor oil plant Ricinus 2 species 18