The Desert Botanical Garden is a 50 acre (20 ha) botanical garden located within Papago Park in Phoenix, Arizona, USA. Founded in 1939, the garden now has more than 21,000 plants, including 139 species which are rare, threatened or endangered. Of special note are the rich collections of agave (176 taxa) and cacti (10,350 plants in 1,350 taxa), especially the Opuntia sub-family. An acre is a measure of land area in Imperial units or U.S. customary units. ... A hectare (symbol ha) is a metric unit of surface area, equal to 100 ares (the name is a contraction of the SI prefix hecto + are). ... Inside the United States Botanic Garden Inside the United States Botanic Garden Inside Kew Gardens Palm House Botanical gardens grow a wide variety of plants both for scientific purposes and for the enjoyment and education of visitors. ... In geography, location is a position or point in physical space expressed relative to the position of another point or thing. ... This article is about the city in Arizona. ... The United States of America — also referred to as the United States, the U.S.A., the U.S., America, the States, or (archaically) Columbia—is a federal republic of 50 states located primarily in central North America (with the exception of two states: Alaska and Hawaii). ... 1939 was a common year starting on Sunday (link will take you to calendar). ... A garden is a planned space, usually outdoors, set aside for the display, cultivation and enjoyment of nature. ... Divisions Green algae land plants (embryophytes) non-vascular embryophytes Hepatophyta - liverworts Anthocerophyta - hornworts Bryophyta - mosses vascular plants (tracheophytes) seedless vascular plants Lycopodiophyta - clubmosses Equisetophyta - horsetails Pteridophyta - true ferns Psilotophyta - whisk ferns Ophioglossophyta - adderstongue ferns seed plants (spermatophytes) †Pteridospermatophyta - seed ferns Pinophyta - conifers Cycadophyta - cycads Ginkgophyta - ginkgo Gnetophyta - gnetae Magnoliophyta - flowering... In biology, a species is a kind of organism. ... An endangered species is a species whose population is so small that it is in danger of becoming extinct. ... In common usage, a collection is any group of items that has one or more properties in common. ... Species Agave americana Agave fourcroydes Agave sisalana many others, see text For the queen of Greek mythology, see Agave (mythology). ... A taxon (plural taxa) is an element of a taxonomy, e. ... This article is about the desert plant. ... Species Many, see text Opuntia is a genus in the cactus family Cactaceae. ...

See also

• List of botanical gardens in the United States

This list of botanical gardens in the United States is intended to include all significant botanical gardens and arboretums in the United States of America. ...

External links

• official Desert Botanical Garden website (http://www.dbg.org/)