"Transition from bracts to sepals in a cactus flower." -Bergen, 1896

Bracts to Sepals

"Transition from bracts to sepals in a cactus flower." -Bergen, 1896

A scene in the desert with various cacti

Cacti

A scene in the desert with various cacti

These plants have adapted to continuous drought and are able to retain great amounts of water. These species are characteristic of the warm and dry regions of America.

Cacti

These plants have adapted to continuous drought and are able to retain great amounts of water. These…

A genus of exogenous plants containing several hundred varieties, all but one species being native to America. Cactus plants have large and fleshy stems with a watery or milky juice taste.

Cactus Plants

A genus of exogenous plants containing several hundred varieties, all but one species being native to…

A prickly pear cactus flower

Cactus

A prickly pear cactus flower

A prickly pear cactus flower, shown vertical

Cactus

A prickly pear cactus flower, shown vertical

Flattened branch of a prickly pear

Cactus

Flattened branch of a prickly pear

Horizontal plan of arrangement of prickly pear flower

Cactus

Horizontal plan of arrangement of prickly pear flower

Echinocalus, the flowers are several inches in diameter

Cactus

Echinocalus, the flowers are several inches in diameter

Branch of phyllocactus

Cactus

Branch of phyllocactus

A cactus blossom.

Cactus

A cactus blossom.

"Cereus speciosissimus. 1. section of the fruit of Opuntia deillenii; 2. of the seed; 3. section of seed of Mammillaria." -Lindley, 1853

Cactus

"Cereus speciosissimus. 1. section of the fruit of Opuntia deillenii; 2. of the seed; 3. section of…

The Coast Barrel Cactus (Ferocactus viridescens) is a cactus seen throughout southern California.

Coast Barrel Cactus

The Coast Barrel Cactus (Ferocactus viridescens) is a cactus seen throughout southern California.

The giant cactus is by far the largest form of vegetation in the desert. They can grow to be over 20 to 40 feet tall and 12 to 18 inches in diameter.

Giant Cactus (cereus giganteus).

The giant cactus is by far the largest form of vegetation in the desert. They can grow to be over 20…

The prickly pear or Indian fig is a cactus that grows in the southwestern part of the United States.

Prickly Pear

The prickly pear or Indian fig is a cactus that grows in the southwestern part of the United States.

"Called the Indian fig. The opuntia is a fleshly and succulent plant, destitute of leaves, covered with clusters of spines, and consisting of flattened joints inserted upon each other." -Marshall

Prickly Pear Cactus

"Called the Indian fig. The opuntia is a fleshly and succulent plant, destitute of leaves, covered with…

"Flowers often grow out of the cacti in a very unexpected fashion and of very curious forms. We give illustration of a variety, whose flower very much resembles a starfish." -Lupton

The Starfish Cactus

"Flowers often grow out of the cacti in a very unexpected fashion and of very curious forms. We give…

The genus Mammillaria is one of the largest in the cactus family Cactaceae. the distinctive feature of the genus is the specific development of an areole, that is split into two clearly separated parts, one occurring at the tubercules apex, the other at its base.

Mammillaria

The genus Mammillaria is one of the largest in the cactus family Cactaceae. the distinctive feature…

"Melon-Cactus." -Bergen, 1896

Melon Cactus

"Melon-Cactus." -Bergen, 1896

The melon cactus or Melocactus.

Melon Cactus

The melon cactus or Melocactus.

A type of cactus.

Chili palm

A type of cactus.

A strong, silky cactus capable of being drawn into threads.

Pita Plant

A strong, silky cactus capable of being drawn into threads.

It is native to the Sonoran Desert in Arizona, the Mexican states of Sonora and Baja California, and an extremely small area of California.

Saguaro

It is native to the Sonoran Desert in Arizona, the Mexican states of Sonora and Baja California, and…