Plants

How to Know the Ferns

Poison-ivy, Poison-oak and Poison Sumac: Identification, Precautions and Eradication

Palm trees of the Amazon and their uses

Canadian Wild Flowers: Selections from the Writings of Miss Helen M. Johnson

Seed Dispersal

Wayside and Woodland Trees: A pocket guide to the British sylva

The Study of Plant Life

The Botanical Lore of the California Indians with Side Lights on Historical Incidents in California

A Synopsis of the British Mosses

Identification of the Larger Fungi

Parables from Flowers

Ferns of Hawaii National Park

Fossil Forests of the Yellowstone National Park

Trees of the Forest: Their Beauty and Use

Spring in a Shropshire Abbey

Flower Guide: Wild Flowers East of the Rockies (Revised and with New Illustrations)

Flowers of Mountain and Plain

Eye Spy: Afield with Nature Among Flowers and Animate Things

Young Folks' Nature Field Book

Language of Flowers