Sonoran Desert wildflowers : a field guide to common species of the Sonoran Desert, including Anza-Borrego Desert State Park, Saguaro National Park, Organ Pipe Cactus National Monu...

by Spellenberg, Richard, Spellenberg, Richard
Published 2012

Sonoran Desert wildflowers : a field guide to common species of the Sonoran Desert, including Anza-Borrego Desert State Park, Saguaro National Park, Organ Pipe Cactus National Monu...

by Spellenberg, Richard
Published 2003

The Audubon Society field guide to North American wildflowers, western region /

by Spellenberg, Richard
Published 1979

National Audubon Society field guide to North American wildflowers : western region /

by Spellenberg, Richard
Published 2001

The National Audubon Society field guide to North American wildflowers, Western Region /

by Spellenberg, Richard
Published 2001

A report on the investigation of Eriogonum gypsophilum and Haplopappus spinulosus subspecies Laevis in the vicinity of the Brantley Reservoir, Eddy Co., N.M. /

by Spellenberg, Richard
Published 1977

A specimen-based, annotated checklist of the vascular plants of Parque Nacional "Cascada de Basaseachi" and adjacent areas, Chihuahua, México /

by Spellenberg, Richard
Published 1996

The Audubon Society field guide to North American wildflowers, western region /

by Spellenberg, Richard
Published 1979

Sonoran Desert wildflowers : a field guide to common species of the Sonoran Desert, including Anza-Borrego Desert State Park, Saguaro National Park, Organ Pipe Cactus National Monu...

by Spellenberg, Richard
Published 2003

The sunflower family : a guide to the family Asteraceae in the contiguous United States /

by Spellenberg, Richard, Zucker, Naida
Published 2019

The sunflower family : a guide to the family Asteraceae in the contiguous United States /

by Spellenberg, Richard, Spellenberg, Richard, Zucker, Naida, 1945-, Zucker, Naida, 1945-
Published 2019

Trees of western North America /

by Spellenberg, Richard, Spellenberg, Richard, Earle, Christopher J., Nelson, Gil, 1949-
Published 2014

Trees of Western North America /

by Spellenberg, Richard, Spellenberg, Richard, Spellenberg, Richard, Spellenberg, Richard, Spellenberg, Richard, Earle, Christopher J., Earle, Christopher J., Earle, Christopher J., Nelson, Gil, 1949-, Nelson, Gil, 1949-, Nelson, Gil, Nelson, Gil
Published 2014

Trees of Eastern North America /

by Nelson, Gil, Nelson, Gil, 1949-, Nelson, Gil, 1949-, Nelson, Gil, Nelson, Gil, Nelson, Gil, Earle, Christopher J., Earle, Christopher J., Earle, Christopher J., Spellenberg, Richard, Spellenberg, Richard, Spellenberg, Richard
Published 2014

Trees of Eastern North America /

by Nelson, Gil, 1949-, Nelson, Gil, 1949-, Earle, Christopher J., Spellenberg, Richard
Published 2014

New Mexico vegetation : past, present, and future /

by Dick-Peddie, William A, Dick-Peddie, William A
Published 1993

New Mexico vegetation, past, present, and future /

by Dick-Peddie, William A
Published 1993

New Mexico vegetation, past, present, and future /

by Dick-Peddie, William A
Published 1992

Trees of Eastern North America

by Nelson, Gil
Published 2014