Horticulture  Tags: agronomy plants botany farming agriculture gardening crops food steenbock  

American Horticultural Society maps for determining heat tolerance zones

An interactive map incorporating county crop statistics from the US Agricultural Census and crop lists by state experts,

The map shows 10 different zones, each of which represents an area of winter hardiness for plants. It also introduces zone 11 to represent areas that have average annual minimum temperatures above 40 F (4.4 C) that are therefore essentially frost free.

Downloadable photographs from the Agricultural Research Service.

Images currently cover Plant Geography, Plant Morphology, Phloem Development, Xylem Development, Floral Ontogeny, Lichens, Economic Botany, Carnivorous Plants, Organography, Pollen, Paleobotany, Plant Defense Mechanisms and Plant Anatomy.

Nearly 100,000 images of plants.

Comprehensive image search engine.

More than 4000 images of more than 2000 plants.

Designed to assist botanists, ecologists, and natural resource managers with the identification of plants, the Plant Image Gallery includes over 600 species of vascular plants.

This photo gallery contains pictures of common North American plants. Some of the plant species listed are not generally considered weeds but may have toxic or poisonous properties, or are otherwise of general interest as wildflowers or herbs.

Iowa State University's Image gallery of plant diseases and damage.

USDA PLANTS database emphasizes photos and line drawings of U.S. plants but also contains many cultiveated or foreign taxa.

Digitized selections from a variety of Special Collections' rare books, nursery and seed trade catalogs, and manuscript collections. Each image is a digital reproduction of the original artwork or written text.

Organized by plant type, the TPDH includes definitions of plant diseases as well as images for some but not all pathologies.

Collection of botany images and movie clips organized to serve the needs of the students and instructors of the introductory course General Botany.

Includes slide sets on Potato, Bean, Cucumber, Carrot, Mint, and Fungicides.