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USDA Forest Service

USDA Forest Service

The U.S. Department of Agriculture Forest Service is a Federal agency that manages public lands in national forests and grasslands. The Forest Service is also the largest forestry research organization in the world, and provides technical and financial assistance to state and private forestry agencies. Gifford Pinchot, the first Chief of the Forest Service, summed up the purpose of the Forest Service—"to provide the greatest amount of good for the greatest amount of people in the long run."
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Image Subject Name Scientific Name Description
5476223 pricklypear/cholla Opuntia spp.
5482957 pricklypear/cholla Opuntia spp.
5488032 pricklypear/cholla Opuntia spp.
4060098 star chickweed Stellaria pubera
1462015 shadscale Atriplex confertifolia
1196025 bouncingbet Saponaria officinalis
0807034 kingcup cactus Echinocereus triglochidiatus Pike and San Isabel National Forests, south-central Colorado
4061030 cacti Big Bend. Texas 7/70
1215015 walkingstick cholla Opuntia imbricata close-up of single flower and flower buds
1213009 walkingstick cholla Opuntia imbricata
1215016 walkingstick cholla Opuntia imbricata single plant in typical habitat
1216088 Colorado four o'clock Mirabilis multiflora close-up of flowers
1215025 bouncingbet Saponaria officinalis close-up of flower stalks
1206070 Hooker's sandwort Arenaria hookeri whole plant
1206069 Hooker's sandwort Arenaria hookeri flower close-up
0807064 plains pricklypear Opuntia polyacantha Pike and San Isabel National Forests, south-central Colorado
1211098 blite goosefoot Chenopodium capitatum close-up of flower spike
1211067 western springbeauty Claytonia rosea whole plant in typical habitat
1377010 narrowleaf spring-beauty Claytonia virginica
1206068 Fendler's sandwort Arenaria fendleri whole plant
1211066 heartleaf springbeauty Claytonia cordifolia mass of plants in typical habitat
1196003 bouncingbet Saponaria officinalis
1211097 blite goosefoot Chenopodium capitatum whole plant in typical coarse-textured soil habitat
1211044 spinystar cactus Escobaria vivipara var. vivipara side view of single plant in typical habitat
1216052 Simpson hedgehog cactus Pediocactus simpsonii top view of single flowering plant
1399035 plains pricklypear Opuntia polyacantha
2132019 alligatorweed Alternanthera philoxeroides
2132020 alligatorweed Alternanthera philoxeroides
1213010 walkingstick cholla Opuntia imbricata canes and red flowers
1205084 tuber starwort Pseudostellaria jamesiana several plants in typical forested habitat
1211032 kingcup cactus Echinocereus triglochidiatus whole plant with abundant flowers
1209030 bitter root Lewisia rediviva single flower blossom
1205074 bouncingbet Saponaria officinalis close-up of single flower cluster
4061029 pricklypear/cholla Opuntia spp.  7/70
1211033 kingcup cactus Echinocereus triglochidiatus close-up of single flower
1209031 bitter root Lewisia rediviva whole plant with several blossoms
1216067 plains pricklypear Opuntia polyacantha close-up of single flower
0807070 Simpson hedgehog cactus Pediocactus simpsonii Pike and San Isabel National Forests, south-central Colorado
0807092 moss campion Silene acaulis Pike and San Isabel National Forests, south-central Colorado
1196227 nightflowering catchfly Silene noctiflora
1196235 common chickweed Stellaria pallida
1216066 plains pricklypear Opuntia polyacantha close-up of flowers and pads
1211087 field chickweed Cerastium arvense top view of whole plant in typical habitat
1216051 Simpson hedgehog cactus Pediocactus simpsonii top view of single flowering plant
1211086 field chickweed Cerastium arvense close-up of flowers
0807059 Colorado four o'clock Mirabilis multiflora Pike and San Isabel National Forests, south-central Colorado
1211035 nylon hedgehog cactus Echinocereus viridiflorus whole plant in flower in typical habitat
1211068 western springbeauty Claytonia rosea side view of single plant next to ponderosa pine cone for scale
1211045 spinystar cactus Escobaria vivipara var. vivipara top view of single plant in typical habitat
1216065 plains pricklypear Opuntia polyacantha close-up of two pads
1211034 nylon hedgehog cactus Echinocereus viridiflorus close-up of single flower
5422002 alligatorweed Alternanthera philoxeroides Nodes In July
5379493 alligatorweed Alternanthera philoxeroides
5379494 alligatorweed Alternanthera philoxeroides upright stem
5379491 alligatorweed Alternanthera philoxeroides Alligator weed and pampasgrass (Cortaderia jubata) infestation.
5379492 alligatorweed Alternanthera philoxeroides
5379490 alligatorweed Alternanthera philoxeroides Alligator weed and pampasgrass (Cortaderia jubata) infestation.
5379488 alligatorweed Alternanthera philoxeroides
5379489 alligatorweed Alternanthera philoxeroides
1473252 pricklypear/cholla Opuntia spp. in bloom
1473071 saguaro Carnegiea gigantea cactus have bacterial necorosis, note one collapsed and others cankered
1539022 alligatorweed Alternanthera philoxeroides
1539023 alligatorweed Alternanthera philoxeroides
1539024 alligatorweed Alternanthera philoxeroides
1539025 alligatorweed Alternanthera philoxeroides
1539026 alligatorweed Alternanthera philoxeroides
1539027 alligatorweed Alternanthera philoxeroides
1539028 alligatorweed Alternanthera philoxeroides
1539029 alligatorweed Alternanthera philoxeroides
1539030 alligatorweed Alternanthera philoxeroides
1473232 saguaro Carnegiea gigantea 10/7/1941
1473233 saguaro Carnegiea gigantea large saguaro plant; 4/1942
1473235 saguaro Carnegiea gigantea saguaro forest panorama
1473239 saguaro Carnegiea gigantea saguaro blossoms; 6/6/1942
1473240 saguaro Carnegiea gigantea saguaro flower and ripe fruit
1473241 saguaro Carnegiea gigantea Papago Indian girl harvesting saguaro fruit
1473230 organ pipe cactus Stenocereus thurberi healthy organ pipe cactus; 3/16/1941
1473251 barrel cactus Ferocactus spp. in bloom
1473249 pricklypear/cholla Opuntia spp. 10/30/1946
5028074 narrowleaf spring-beauty Claytonia virginica A very early-flowering species
5028075 narrowleaf spring-beauty Claytonia virginica One of the first spring flowers visible in the Midwest.
1208090 fourwing saltbush Atriplex canescens In late fall

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