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The Cactaceae - http://www.botany.hawaii.edu/faculty/carr/cact.htm
Description of the cactus family, with photos and short profiles of several representative species. |
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Cacti Guide - http://cactiguide.com/
Images of many cactus genera as planted specimens in collections or in natural habitat, with horticultural advice and a discussion forum. |
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Outdoor Cacti Photos - http://www.xmission.com/~mbmiles/
Photos of Opuntia, Echinocereus, and others, resources, and tips for growing and photographing them. |
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Mark Faint's Cactus Page - http://www.mfaint.demon.co.uk/cactus/
Detailed information on Neolloydia, Notocactus, and Turbinicarpus. |
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Cactus Museum - http://www.cactusmuseum.com/
Photos and notes for many species from a cactus grower in Tucson, Arizona. |
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Cacti and Other Succulents - http://www.biology.ed.ac.uk/research/groups/jdeacon/desertecology/cacti.htm#top
Provides an overview of these drought tolerant plants and the convergent evolution which has resulted in there being similar looking plants from very different plant families. |
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Cactaceae - http://delta-intkey.com/angio/www/cactacea.htm
Botanical characteristics of this family of plants with technical drawings of a number of species. |
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Rhipsalis, Lepismium, Hatiora, Schlumbergera - http://www.rhipsalis.com/
Information on plants in these four genera, including species lists with photos, cultivation and propagation details, and links to vendors and collections. |
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Plants of the Cactaceae Family - http://www.desert-tropicals.com/Plants/Cactaceae/
Large image gallery of cacti cultivated in Phoenix, Arizona. |
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Peterocactus National Plant Collection - http://www.manntaylor.com/ptero.html
List of the nine species, endemic to southwestern Argentina, with images and brief descriptions of four. |
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Keir's Botanical Photo Archive - Cactaceae - http://www.keiriosity.com/cactaceae/cactaceae.html
Images from the US. |
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Southwestern Cacti - http://www.whitethornhouse.com/cacti/cacti.htm
Information and photos for species native to the southwestern United States. |
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Cacti of Chile - http://www.chileflora.com/Florachilena/FloraEnglish/B_CACTUS_PLANTS.htm
Photographs of several species including Austrocactus, Capiapoa, Echinopsis and Opuntia. |
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Close-up View of Several Cacti - http://www.microscopy-uk.org.uk/mag/artjan07/bj-cacti.html
Photographic study by Brian Johnston of these plants, with many fine images of flowers and spines, both macroscopic and microscopic. |
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Chihuahuan Desert Cacti - http://www.biology.ed.ac.uk/research/groups/jdeacon/desertecology/chicacti.htm#top
Information and photographs of several species found in this region: Ariocarpus fissuratus, Epithelantha bokei, Echinocactus horizonthalonius, Ancistrocactus uncinatus, Echinocereus pectinatus and species of Echinocereus. |