Apps in this category may contain mild or occasional cartoon, fantasy or real-life violence, as well as occasional or mild adult, sexually suggestive or horrifying content and may not be suitable for children under 9 years of age.

12+

Apps in this category may contain occasional mild indecent language, frequent or intense cartoon or real-life violence, minor or occasional adult or sexually suggestive material, and simulated gambling, and may be for children under 12 years of age.

17+

You must be at least 17 years old to access this App.

Apps in this category may contain frequent and intense offensive language; Frequent and intense cartoon, fantasy or realistic violence: frequent and intense adult, scary and sexually suggestive subjects: as well as sexual content, nudity, tobacco, alcohol and drugs, may not be suitable for children under 17 years of age.

NWF Guide to Trees 螢幕截圖

iPad

iPhone

About NWF Guide to Trees

This authoritative and easy-to-use guide features 708 types of trees found in North America, with nearly 4,000+ photographs, text descriptions to help identify tree species, and robust search functions to aid in species identification.

Utilizing the latest iOS technologies, you can:

• Search by name (common and scientific) using either keyboard or verbal search systems; type or speak all or part of a mushroom’s name to search for its detailed account.
• Organize species alphabetically or taxonomically.
• Search by region, leaf or needle shape and arrangement, bark type, color, flower and fruit type, color—or any combination.
• Touch to open any or all of the text sections and to enlarge photos to aide with identification in the field.
• Take notes and upload photos to keep a digital journal of your observations and share them with family, friends, and our growing online community.  
Each species account contains:

• description with identification details
• habitat description
• range information
• discussion about the species’ history, habitat, flower, leaf types, fruit and other notable characteristics
• taxonomic Order information
• photos of similar species with links to those species’ accounts
• links to additional information for every species

Other National Wildlife Federation Nature Guide apps in this series include:

Wildlife Guides
• National Wildlife Federation Guide to Birds
• National Wildlife Federation Guide to Mammals
• National Wildlife Federation Guide to Reptiles
• National Wildlife Federation Guide to Amphibians
• National Wildlife Federation Guide to Butterflies
• National Wildlife Federation Guide to Insects and Spiders
• National Wildlife Federation Guide to Mushrooms

Garden Guides
• National Wildlife Federation Guide to Herbs
• National Wildlife Federation Guide to Vegetables