Web Directory

» Cholla Cactus: Genus Opuntia
   Cholla is a name for various shrubby cacti of this genus with cylindrical stems composed of segmented joints. Photographs and information on several species.
   http://www.desertusa.com/mag99/may/papr/chollas.html

» Eastern Prickly Pear Cactus: Opuntia humifusa
   Student project including classification, habitat, adaptation, nutrition, reproduction and interactions with other species.
   http://bioweb.uwlax.edu/bio203/2010/osterbri_sara/

» Genus Opuntia
   Description of the genus and its species in the Sonoran Desert, Arizona. Includes illustrations.
   http://www.desertmuseum.org/books/opuntia.html

» Looking at a Cactus with the QX5 Microscope
   Rudolf Baumueller turns his microscope on the cactus, Opuntia, and produces a photographic study of the plant.
   http://www.microscopy-uk.org.uk/mag/artaug06/rb-qx5.html

» Opuntia
   Description and culture.
   http://www.botany.com/opuntia.html

» Opuntia arenaria - Dune Pricklypear
   Image, description, and range of this rare plant in New Mexico.
   http://nmrareplants.unm.edu/rarelist_single.php?SpeciesID=122

» Opuntia basilaris
   Description of the Beavertail Cactus and information on its habitat and range, with several photographs.
   http://www.desertusa.com/april96/du_beavtail.html

» Opuntia cholla
   Information and photographs of the Chain Link Cholla growing in the desert regions of Baja California.
   http://www.biology.ed.ac.uk/research/groups/jdeacon/desertecology/choimag2.htm#top

» Opuntia dillenii
   Photograph of a fine plant in Tenerife, laden with fruit.
   http://www.ecosystema.ru/08nature/world/52ten/031e.htm

» Opuntia ficus-indica
   image
   http://www.dipbot.unict.it/orto/0116-1.html

» Opuntia fragilis
   General information and classification.
   http://florawww.eeb.uconn.edu/198502292.html

» Opuntia fulgida
   All about the Chain Fruit Cholla, description, photograph, range, habitat and scientific and common names.
   http://www.desertusa.com/mag98/may/papr/du_chaincholla.html

» Opuntia humifusa
   Species summary from the USDA Forest Service.
   http://www.fs.fed.us/database/feis/plants/cactus/opuhum/all.html

» Opuntia humifusa: Prickly Pear
   Photographs of this low-growing cactus, with its description and identifying characteristics.
   http://www.ppws.vt.edu/scott/weed_id/opuhu.htm

» Opuntia leptocaulis
   Photograph and description of the Desert Christmas Cactus and information on its habitat and range.
   http://www.desertusa.com/mag98/dec/papr/xmascactus.html

» Opuntia leptocaulis - Desert Christmas Cactus
   Images from Arizona.
   http://www.naturesongs.com/vvplants/christmascactus.html

» Opuntia linguiformis
   image
   http://www.dipbot.unict.it/orto/1053-1.html

» Opuntia microdasys
   General information and classification.
   http://florawww.eeb.uconn.edu/198502330.html

» Opuntia oricola, Opuntia littoralis
   Photographs and information on these prickly pears which can be found in the Santa Monica Mountains.
   http://www.smmtc.org/plantofthemonth/plant_of_the_month_200908_Prickly_Pear.htm

» Opuntia phaeacantha - Desert Prickly Pear
   Images from Arizona.
   http://www.naturesongs.com/vvplants/desertpricklypear.html

» Opuntia polyacantha
   Photographs of this prickly-pear cactus growing in its natural habitat.
   http://www.em.ca/garden/native/nat_opuntia_polyacantha.html

» Opuntia polycantha
   Species summary from the USDA Forest Service.
   http://www.fs.fed.us/database/feis/plants/cactus/opupol/all.html

» Opuntia schumannii
   image
   http://www.dipbot.unict.it/orto/0118-1.html

» Opuntia stricta
   Taxonomy, description and photograph of this prickly pear growing in Florida.
   http://www.sms.si.edu/irlspec/Opuntia_stricta.htm

» Opuntia tomentosa
   image
   http://www.dipbot.unict.it/orto/0120-1.html

» Opuntia viridiflora - Santa Fe Cholla
   Description, image, and range of this rare plant in New Mexico.
   http://nmrareplants.unm.edu/rarelist_single.php?SpeciesID=61

» Prickly Pear Cactus
   Information on these cacti with photographs and descriptions of several species found in Arizona.
   http://www.desertusa.com/magoct97/oct_pa/du_prkpear.html

» Prickly Pears and Chollas
   Descriptions, ecology and images.
   http://www.biology.ed.ac.uk/research/groups/jdeacon/desertecology/opuntia.htm