Biology

The Pterigynandraceae contain about five genera and 20-25 species, primarily occurring in the Northern Hemisphere. One genus, Trachyphyllum, is described here.

Botanical characteristics of the genus.

Several photographs of this species.

Images of seeds, bark, foliage, and branches. Includes specimen lists and mapping coordinates.

Description of the Hoop Pine, including range, dendrochronology, and ethnobotany.

Taxonomic notes, description, and range of the MacNab Cypress. Includes images.

Includes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology.

Includes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology.

Description, range and images of Eastern Redcedar.

Includes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology.

Taxonomic notes, physical description, and range information. Commonly known as Fraser Fir.

Includes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology.

Brief fact sheet plus images of mature tree, twig, fruit, leaf, and back.

Includes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology.

Includes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology.

Includes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology.

Includes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology.

Includes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology.

Description and images of Longleaf Pine.

Includes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology.

Includes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology.

Includes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology.

Includes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology.

Description and image of Torrey Pine.

Research project by Lindsay Frie at the University of Wisconsin-LaCrosse.

Taxonomic notes, description, range, and ethnobotany. Includes photo of foliage and pollen cones.

Information on distribution and occurrence, value and use, characteristics, and fire ecology.

Physical description, ethnobotany, and distribution map for this genus.

Key to the species and description.

Collection record, Ecology and Evolutionary Biology Conservatory and Gardens, University of Connecticut.

Taxonomic data and mapped distribution of this club-moss from Atlas of Florida Vascular Plants.

microscopic image

General information and classification.

Photograph of this species and information on its taxonomy.

General information and classification.

General information and classification.

Image.

General information and classification.

General information and classification.

General information and classification.

Article by Chris Thomas with photographs of various species of Narcissus and photomicrographs of their germinating grains of pollen.

Photographic study by Brian Johnston of Narcissus pseudonarcissus, with many fine images both macroscopic and microscopic.

General information and classification.

General information and classification.

Photographs of flowers and leaves.

Photograph of a field grown crop of this root vegetable.

General information and classification.

General information and classification.

General information and classification.

General information and classification.