+56 项
Purple Prairieclover (Petalostemon purpureum) (1925)
Purple Prairieclover (Petalostemon purpureum) (1925)
Pygmy Androsace (Androsace subumbellata) (1925)
Pygmy Androsace (Androsace subumbellata) (1925)
Queencup (flower) (Clintonia uniflora) (1925)
Queencup (flower) (Clintonia uniflora) (1925)
Queencup (flower) (Clintonia uniflora) (1925)
Queencup (fruit) (Clintonia uniflora) (1925)
Queencup (fruit) (Clintonia uniflora) (1925)
Quill-leaf Tillandsia (Tillandsia fasciculata) (1925)
Quill-leaf Tillandsia (Tillandsia fasciculata) (1925)
Ramshead Ladyslipper (Cypripedium arietinum) (1925)
Ramshead Ladyslipper (Cypripedium arietinum) (1925)
Red Chokeberry (flower) (Aronia arbutifolia) (1925)
Red Chokeberry (flower) (Aronia arbutifolia) (1925)
Rhodora (Rhodora canadensis) (1925)
Rhodora (Rhodora canadensis) (1925)
Rhodora (Rhodora canadensis) (1925)
Rocky Mountain Cassiope (Cassiope mertensiana) (1925)
Rocky Mountain Cassiope (Cassiope mertensiana) (1925)
Rocky Mountain Kalmia (Ixalmia microphylla) (1925)
Rocky Mountain Kalmia (Ixalmia microphylla) (1925)
Rocky Mountain Rhododendron (Rhododendron albiflorum) (1925)
Rocky Mountain Rhododendron (Rhododendron albiflorum) (1925)
Rocky Mountain Twayblade (Ophrys nephrophylla) (1925)
Rocky Mountain Twayblade (Ophrys nephrophylla) (1925)
Rosebay Rhododendron (Rhododendron maximum) (1925)
Rosebay Rhododendron (Rhododendron maximum) (1925)