David Y. Allen:
Engelmann Oaks, Santa Rosa Ecological Reserve
David Y. Allen:
Engelmann Oak
David Y. Allen:
Coast Redwoods
David Y. Allen:
Redwood Grove
David Y. Allen:
Rising to the Sun
David Y. Allen:
Redwood Forest
David Y. Allen:
Coast Redwoods
David Y. Allen:
Sea Stack with Beach Grass
David Y. Allen:
Lots of Trees
David Y. Allen:
Butte Lake (3)
David Y. Allen:
Twisted
David Y. Allen:
Palm Canyon
David Y. Allen:
Ironwood and Cactus
David Y. Allen:
Desert Vegetation on Lava Flow
David Y. Allen:
Elephant Tree
David Y. Allen:
Desert Plants
David Y. Allen:
Desert Vegetation and Rocks
David Y. Allen:
Daley Ranch, Escondido
David Y. Allen:
Torrey Pines
David Y. Allen:
Torrey Pines
David Y. Allen:
Bristlecone Pine
David Y. Allen:
Bristlecone Pine
David Y. Allen:
17 Palms Oasis, Anza Borrego State Park
David Y. Allen:
Carrizo Wash, Anza-Borrego Desert State Park
David Y. Allen:
Joshua Tree, Joshua Tree National Park
David Y. Allen:
Palo Verde--Cottonwood Springs--Joshua Tree National Park
David Y. Allen:
Elephant Tree, Torote Bowel, Anza-Borrego State Park
David Y. Allen:
Cardiff Beach from Swami's Park
David Y. Allen:
Crows, Torrey Pines
David Y. Allen:
Palo Verde Tree, Palo Verde Wash, Anza-Borrego State Park
