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2001 - 200 of 211234 results
"Pitting" of shortgrass near Keota, Colorado
"Pitting" of shortgrass near Keota, Colorado
Plantago major
Plantago major
Plantago major leaf spike
Plantago major leaf spike
Plantago purshii
Plantago purshii
Plant, in ground, showing leaves and flower
Plant, in ground, showing leaves and flower
Plant succesion on the rocks
Plant succession on rocks
Plant succession on rocks
Plant succession on rocks
Plant succession on rocks
Plant succession on rocks
Plant succession on rocks, blueberry in flower, close up
Plant succession on rocks showing lichens, etc.
Plant succession on rocks showing lichens, mosses
Plant succession on rocks with blueberry in flower
Plant succession on the rocks
Plant succession on the rocks
Plant succession on the rocks
Plant succession on the rocks
Plant succession on the rocks
Plant succession on the rocks
Plant succession on the rocks
Plant succession on the rocks near Palisade Head on Lake Superior
Plant succession showing Poplars and Willows on the North Shore after a fire
Plant succession showing Poplars and Willows on the North Shore after a fire
Platanthera lacera
Pleurotus ostreatus
Pleurotus ostreatus
Pleurotus ostreatus, near view
Pleurotus ulmarius (Hypsizygus ulmarius)
Pleurotus ulmarius (Hypsizygus ulmarius)
Plover Captives, Reel 4
Plover Captives, Reel 5
Plover, Reel 1
Plover, Reel 2
Plover, Reel 3
Plowing of a field, resulting in drifted soil along fence on private land south of Keota, Colorado
Plum trees in blossom on the University Farm
Pluteus sp.
Poa pratensis
Podophyllum
Podophyllum peltatum in the woods
Podophyllum, single flower and leaves
Pogonia
Pogonia
Pogonia
Pogonia ophioglossoides
Pogonia ophioglossoides
Poison Sumac berries in autumn
Polemonium reptans
Polemonium reptans
Pollen of epilobium, etc.
Pollination in Artistolochia, chart and diagram
Pollination in Asclepias
Pollination in Cypripedium, etc.
Pollination in Epilobium
Pollination in Epilobium, chart, diagram
Pollination in Epilobium, chart, diagram
Pollination in Lily, diagram from chart
Pollination in Lythrum, chart and diagram
Pollination in Monkey Flower
Pollination in Orchid, chart and diagram
Pollination in Petunia, diagram, text, and figure
Pollination in raspberry, etc.
Pollination in Salvia, chart and diagram
Pollination in Salvia, chart and diagram
Pollinia (Chrysopogon), Orchis mascula
Polygala cruciata
Polygala cruciata
Polygala paucifolia
Polygala sanguinea
Polygala sanguinea
Polygala senega
Polygala senega
Polygonatum biflorum
Polygonatum biflorum
Polygonatum commutatum (Polygonatum biflorum)
Polygonatum commutatum (Polygonatum biflorum)
Polygonatum commutatum (Polygonatum biflorum) in fruit
Polygonatum commutatum (Polygonatum biflorum) in fruit
Polygonum
Polygonum
Polygonum aviculare
Polygonum persicaria
Polygonum persicaria
Polypodium
Polypodium
Polypodium
Polypodium on a great tree trunk
Polypodium vulagare on rock cliff
Polypodium vulagare, sori
Polypodium vulgare
Polypodium vulgare
Polypodium vulgare, home garden
Polypodium vulgare in home rock garden