Jack Dykinga / Agave (Agave utahensis) close up of spines with Pinyon pine cone (Pinus edulis) wedged amongst them. Grand Canyon-Parashant National Monument, Arizona, USA
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Jack Dykinga / Pinyon Pines (Pinus edulis) amongst petrified sand dunes on the Colorado Plataeu, Arizona
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Doug Wechsler / Ecotones in Unaweep Canyon, Colorado. Top to bottom: Pinyon-Juniper; Gambel oak; Sage steppe.
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Doug Wechsler / Pinyon-Juniper woodland composed of Pinyon pine (Pinus edulis) and juniper species. Unaweep Canyon, CO, USA
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Jack Dykinga / A lone Pinyon Pine (Pinus sp) amongst petrified sand dunes on the Colorado Plataeu, Arizona
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Shattil & Rozinski / Pinyon pine bark beetle {Ips confusus} beetle and larvae in bark, Colorado, USA
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Jack Dykinga / New snow on Pinyon pines ( Pinus edulis) in morning light. Grand Canyon National Park, Arizona, USA
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Jeff Foott / Pinyon pine (Pinus edulis), dead tree killed by Bark beetle (Ips sp), in snow. Capitol Reef National Park, Utah, USA. January.
