Juniperus scopulorum `Blue Globe' (Blue Globe Juniper)

Juniperus scopulorum `Tolleson's Weeping' (Tolleson's Weeping Juniper)

Panicum virgatum `Heavy Metal' (Switchgrass)

Picea abies `Pendula' (Pendulas Norway Spruce)

Picea glauca `Conica' (Dwarf Alberta Spruce)

Picea pungens `Glauca Globosa' (Spruce Standard)

Picea pungens `Isleli Fastigiate' (Fastigiate Blue Spruce)

Pinus aristata (Bristlecone Pine)

Pinus densiflora `Virides' (Dwarf Japanese Red Pine)

Pinus mugo `Snow Mound' (Mugo Pine)

Pinus strobus `Blue Shag' (White Pine)

Pinus strobus `Macopin' (Macopin Pine)

Pinus sylvestris `Hillside Creeper' (Scotch Pine)

Taxus x media `Wardii' (Wards Yew)

Thuja occidentalis `Hetz Midget' (Arborvitae `Hetz Midget')

Thuja orientalis `Elegantissima' (Arborvitae `Elegantissima')

Books:
Conifers, the Illustrated Encyclopedia
By D.M. Van Gelderen

Manual of Cultivated Conifers
By Gerd Krussmann

Manual of Woody Landscape Plants
By Michael Dirr