Key Phrases - Statistically Improbable Phrases (SIPs):
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ephedra occidentalis, expedition specimens, botanical contributions, baggage party, fifth expedition, fourth expedition, populus angustifolia, erodium cicutarium, third expedition, camp that evening, locality data
Key Phrases - Capitalized Phrases (CAPs):
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John Charles, Sierra Nevada, Great Salt Lake, Great Basin, Bent's Fort, United States, Tehama County, Bear River, Green River, Fort Hall, Vrain's Fort, San Joaquin, American West, Natrona County, Kit Carson, Snake River, John Torrey, The Dalles, Charles Preuss, Sacramento County, Fort Laramie, New York, Senator Benton, Lake Fork, Frémont County
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