A lot of plant information and plant organizations are devoted to a single genus of plant such as Hosta or Hemerocallis (daylily). Listed below are several categories of such information based on single genus status.

Arborvitae (Thuja) Douglas Fir (Pseudotsuga) Maple (Acer)
Ash (Fraxinus) Elms (Ulmus) Mountain Laurel (Kalmia)
Asters English Ivy (Hedera) Oaks (Quercus)
Astilbe Euonymus Peony (Paeonia)
Begonia Fritillaria Penstemon
Birch (Betula) Fuchsia Peony (Paeonia)
Boxwood (Buxus) Geranium Pines (Pinus)
Bouganvillea Ginkgo Poppy (Papaver)
Buckeye (Aesculus) Gladiolus Primrose (Primula)
Camellia Hellebore Rhododendron
Chrysanthemum Hemlock (Tsuga) Roses
Clematis Hibiscus Sedum
Coralbells (Heuchera) Honeylocust (Gleditsia) Sunflowers (Helianthis)
Crabapples (Malus) Honeysuckle (Lonicera) Tuliptree (Liriodendron)
Daffodil (Narcissus) Hosta Verbena
Dahlia Iris Viburnum
Daylily (Hemerocallis) Junipers Violets (Viola)
Delphinium Lilac Walnut (Juglans)
Dianthus Lily (Lillium) Weeds
Dogwoods (Cornus) Magnolia Willows (Salix)

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