Reference

Pat Welsh's Southern California Organic Gardening (3rd Edition)

Gardening: The Complete Guide

The Ever Curious Gardener

Flowers and Their Pedigrees

The Bee Preserver; or, Practical Directions for the Management and Preservation of Hives

Seeds of Michigan Weeds

Gardening in the Lower Midwest

What is that Plant

Native Plants for Southwestern Landscapes

Propagation: Specialist Guide

Vegetable Teratology

The Fern Lover's Companion

The Illustrated Dictionary of Gardening, Division 1; A to Car

British Pomology