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Zygadenus
Zygadenus
Zygadenus
Zonation of floating bog
Zonal distribution on the border of a meadow, Hordeum in the foreground
Zonal distribution of sand shore vegetation
Zonal arrangement of algae in Friendly Cove
Zizia cordata
Zizia
Zizania with sagitaria in foreground
Zizania palustris (Zizania aquatica)
Zizania palustris (Zizania aquatica)
Zizania
Zea mays in flower
Zanthoxylum leaf
Yucca in the desert in Southern California
Yucca in flower
Yucca glauca in Billings, Montana
Yucca glauca, cactus, and sage brush in Billings, Montana
Yucca cactus in the desert in Southern California
Yucca arborescens (Yucca brevifolia)
Young Vireos warbling, double exposure
Young Trees on a fallen log by the trail near camp
Young Night Hawks on Rocks where they hatched
Young forest on the North Shore looking west from Palisade Head
Young Bull Moose, near view
Young Bull Moose
Young Blue Heron near nest, sixty feet above the ground
Young Birch Forest at Itasca State Park
Young beaver on end of dam near Rice Lake
Young beaver on end of dam near Rice Lake
Yellow Water Lily
Yellowstone Lake and the Fish Cone
Yellow Pond Lily, near view
Yellow Lady Slippers and Ferns
Yellow Lady Slipper, nearer view
Yellow Lady Slipper, large
Yellow Lady Slipper and Ferns
Yellow Birch trunk and bark
Yellow Birch trunk and bark
Yellow Bellwort
Yellow Bellwort
Yellow Bellwort
Yellow Bellwort
Yellow Adder's Tongue and Snow Lily
Xanthium strumatium
Xanthium echinatum (Xanthium strumarium)
Woosdia ilvensis
Wool Sower Gall on Quercus alba
Woolly Leaf Gall of Quercus coccinea
Woodsia scopulina on cliffs
Woodsia ilvensis
Woodsia ilvensis
Woodsia ilvensis
Woodsia ilvensis
Woodsia ilvensis
Woodsia catheartiana
Woodsia and bluebells on a rock cliff
Wood Lily
Woodland trail at Itasca State Park
Woodland trail at Itasca State Park
Woodland trail at Itasca State Park
Woodland trail at Itasca State Park
Wooded shore of Clearwater Lake in the Gunflint region
Woodbine on Birch tree
Woodbine leaf
Woman holding Pteris, ten feet, seven inches tall, with women and men looking
Wolffia columbiana
Wolfberry leaf and fruit
Wolfberry leaf and fruit
"Witch's Broom" Bud twig gall of Celtis
"Witch's Broom" Bud twig gall of Celtis
Witch Hazel
Witches' Broom on Hemlock
Witches broom, Gall of Celtis, nearer view
Witches broom, Gall of Celtis
Winter Rosette, Verbascum thlapsus
Winter Rosette, Taraxacum
Winter Rosette, Saxigraga pensylvanica (Micranthes pensylvanica)
Winter Rosette, Potentilla monspeliensis (Potentilla norvegica)
Winter Rosette, Oenothera Rhombipetala
Winter Rosette, Oenothera rhombipetala
Winter Rosette, Oenothera biennis
Winter Rosette, Malva rotundifolia (Malva neglecta)
Winter Rosette, Cirsium arvense
Winter Rosette, Cirsium arvense
Winter Rosette, Capsella bursa-pastoris
Winter Rosette, Achillea millefolium
Winter lodge of the Indians on Lake Isabella
Winter Buds of Cottonwood and Poplar bursting
Winter buds of Cottonwood and Poplar before bursting
Winnebago Valley and bluff looking east from point
Winged Pigweed left after another Blow-out
Winged fruits of Rheum rhabarbarum
Winged fruits of Fraxinus
Winged fruits of an Ash on a leafy twig
Wind swept trees on the Columbia River Gorge in Oregon
Wind swept trees of the forest
Wind swept trees and timberline on Trail Ridge Road in Rocky Mountain Park
Wind swept trees and timberline on Trail Ridge Road in Rocky Mountain Park