Cactaceae
Opuntia oricola Philbrick
Opuntia oricola Philbrick
Opuntia oricola is a large treelike cactus native to southern California and Baja California, growing in coastal scrub and chaparral.
Opuntia phaeacantha Engelm.
Opuntia phaeacantha Engelm.
Opuntia phaeacantha Engelm. is a widespread prickly pear cactus of the southwestern US and Mexico with edible parts eaten by people and wildlife.
Opuntia polyacantha Haw.
Opuntia polyacantha Haw.
Opuntia polyacantha is a cold-hardy North American prickly pear cactus with variable spines, used for food and medicine.
Opuntia robusta H.L.Wendl.
Opuntia robusta H.L.Wendl.
Opuntia robusta is a prickly pear cactus with varied reproductive systems and fleshy blue-grey stem segments.
Opuntia stricta (Haw.) Haw.
Opuntia stricta (Haw.) Haw.
Opuntia stricta is an erect shrubby cactus with yellow flowers, purple-red edible fruits, native to subtropical and tropical American coastal habitats.
Opuntia sulphurea G.Don ex Loudon
Opuntia sulphurea G.Don ex Loudon
Opuntia sulphurea is a low-growing prickly pear cactus native to western South America, listed as Least Concern and potentially invasive.
Opuntia tomentosa Salm-Dyck
Opuntia tomentosa Salm-Dyck
Opuntia tomentosa, also called woollyjoint pricklypear or velvety tree pear, is an Opuntia species found in Mexico.
Pachycereus pecten-aboriginum (Engelm. ex S.Watson) Britton & Rose
Pachycereus pecten-aboriginum (Engelm. ex S.Watson) Britton & Rose
Pachycereus pecten-aboriginum is a Mexican tree cactus with edible fruit and documented traditional medicinal uses.
Pachycereus pringlei (S.Watson) Britton & Rose
Pachycereus pringlei (S.Watson) Britton & Rose
Pachycereus pringlei, the cardon cactus, is the world's tallest living cactus and resembles but differs from the saguaro.
Pachycereus schottii (Engelm.) D.R.Hunt
Pachycereus schottii (Engelm.) D.R.Hunt
Pachycereus schottii, the senita cactus, is a shrubby cactus with a mutualistic relationship with senita moths, found from southern Arizona to northwestern Mexico.
Pediocactus nigrispinus (Hochstätter) Hochstätter
Pediocactus nigrispinus (Hochstätter) Hochstätter
Pediocactus nigrispinus is a spiny ribbed cactus from the Columbia Plateau area of the northwestern United States, with pink to magenta spring flowers.
Pediocactus simpsonii (Engelm.) Britton & Rose
Pediocactus simpsonii (Engelm.) Britton & Rose
Pediocactus simpsonii is a cold-hardy small cactus native to the interior western United States, cultivated for rock gardens.
Pelecyphora alversonii (J.M.Coult.) D.Aquino & Dan.Sanchez
Pelecyphora alversonii (J.M.Coult.) D.Aquino & Dan.Sanchez
Pelecyphora alversonii is a spiny cactus native to the Mojave Desert region of the southwestern United States.
Pelecyphora dasyacantha (Engelm.) D.Aquino & Dan.Sanchez
Pelecyphora dasyacantha (Engelm.) D.Aquino & Dan.Sanchez
Pelecyphora dasyacantha is a small spiny cactus found in parts of the southwestern US and northern and central Mexico.
Pelecyphora missouriensis (Sw.) D.Aquino & Dan.Sanchez
Pelecyphora missouriensis (Sw.) D.Aquino & Dan.Sanchez
Pelecyphora missouriensis is a cactus native to central and western US and northern Mexico, with many historic sites now extirpated.
Pelecyphora tuberculosa (Engelm.) D.Aquino & Dan.Sanchez
Pelecyphora tuberculosa (Engelm.) D.Aquino & Dan.Sanchez
Pelecyphora tuberculosa is a variable cactus with pink fragrant flowers, growing on igneous rocks in the southwestern US and northern Mexico.
Pelecyphora vivipara (Nutt.) D.Aquino & Dan.Sanchez
Pelecyphora vivipara (Nutt.) D.Aquino & Dan.Sanchez
Pelecyphora vivipara is a small North American clustering cactus with spiny bodies and colorful flowers, declining in the eastern edge of its range.
Peniocereus greggii (Engelm.) Britton & Rose
Peniocereus greggii (Engelm.) Britton & Rose
Peniocereus greggii is a night-blooming Sonoran Desert cactus with a massive edible underground tuber.
Peniocereus striatus (K.Brandegee) Buxb.
Peniocereus striatus (K.Brandegee) Buxb.
Peniocereus striatus is a night-blooming Sonoran Desert cactus that usually grows beneath other nurse plants.
Pereskia aculeata Mill.
Pereskia aculeata Mill.
Pereskia aculeata Mill. is an unusual leafy scrambling cactus with edible leaves and flavorful edible fruits.
Praecereus euchlorus (F.A.C.Weber) N.P.Taylor
Praecereus euchlorus (F.A.C.Weber) N.P.Taylor
Praecereus euchlorus is a leaning cactus species with slender shoots found across parts of eastern South America.
Rhipsalis baccifera (J.S.Muell.) Stearn
Rhipsalis baccifera (J.S.Muell.) Stearn
Rhipsalis baccifera, the mistletoe cactus, is the only cactus species naturally occurring outside the Americas.
Sclerocactus johnsonii (Parry ex Engelm.) N.P.Taylor
Sclerocactus johnsonii (Parry ex Engelm.) N.P.Taylor
Sclerocactus johnsonii is a small cactus species native to the southwestern US and northwestern Mexico, found in desert scrub habitat.
Sclerocactus polyancistrus (Engelm. & J.M.Bigelow) Britton & Rose
Sclerocactus polyancistrus (Engelm. & J.M.Bigelow) Britton & Rose
Sclerocactus polyancistrus is a clustered, spiny cactus native to the Mojave Desert that produces fragrant pink to red-violet flowers.
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