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These are Opuntias that form large shrubs, very large shrubs, or even trees at maturity.

Opuntia ochrocentra

Kunkel ex Britton and Rose, The Cactaceae; Descriptions and Illustrations of Plants of the Cactus Family 4: 262–263. 1923 Lectotype; Herbarium; Herbarium Original Description What is Opuntia ochrocentra? Opuntia ochrocentra is a small- to medium-sized prickly pear cactus from the Florida Keys. (All pictures provided by Danny Green.) Details The pads of O. ochrocentra are …

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Opuntia keyensis

Britton & Small, Journal of the New York Botanical Garden 20: 31, 1919 Herbarium; Herbarium; Black and White Photograph Original Description What is Opuntia keyensis? Opuntia keyensis is native Florida prickly pear cactus found in the Keys and Cape Sable.  Details O. keyensis is a large, erect, multi-branched cactus that forms a shrub or small …

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Opuntia tardospina

Griffiths, Annual Report of the Missouri Botanical Garden 22: 34, 1911 Herbarium; Herbarium; Herbarium; Herbarium; Photograph (top photo); Photograph; Painting Original Description What is Opuntia tardospina? Opuntia tardospina is a large prickly pear cactus first reported from the Lampasas, Texas region. Griffiths reported that this Opuntia was an unusual cactus for several reasons, not the …

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Opuntia discata

Griffiths, Annual Report of the Missouri Botanical Garden 19: 266, 1908 Isotype; Isotype; Herbarium O. discata has some similarities with O. engelmannii Original Description What is Opuntia discata? Opuntia discata is a handsome, large prickly pear cactus. It is ascending and compact to 1-1.4 m tall and perhaps as wide. The distinctive, white spines provide …

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Opuntia canada

Griffiths, Annual report Missouri Botanical Garden 20: 90, 1909 Holotype; Topotype; Herbarium (as O. engelmannii); Painting Original Description What is Opuntia canada? Opuntia canada is a large, erect, ascending cactus that grows in far southern Arizona. It is a compact-appearing prickly pear.  Details O. canada grows in thickets or singly. This Opuntia may reach 1 m …

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Opuntia laevis

Coulter, Contributions from the U. S. National Herbarium 3: 419, 1896 Holotype; Isotype; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Painting (Britton and Rose, v1 1919, plate XXVIII)  Original Description What is Opuntia laevis? Opuntia laevis is a sometimes spineless prickly pear cactus that grows in various locations in southern AZ but particularly on canyon …

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Opuntia gomei

Griffiths, Annual Report of the Missouri Botanical Garden 21: 167, 1910 Holotype; Holotype (O. laxiflora); Isotype; Isotype (O. laxiflora); Herbarium (submitted as O. lindheimeri); Herbarium (O. cyanella); Herbarium (O. gilvoalba); Photograph (O. gilvoalba); Herbarium; O. gomei (painting); O. gomei (painting, O. laxiflora) Original Description What is Opuntia gomei? Opuntia gomei is a common prickly pear near the Rio …

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Opuntia oricola

Philbrick, Cactus and Succulent Journal (U.S.) 36(6): 163, 1964 Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium Original Description What is Opuntia oricola? Opuntia oricola is a medium-sized, easy-to-recognize prickly pear cactus found in coastal California.  Details O. oricola pads are 15 to 26 cm long and 12 to 19 …

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Opuntia occidentalis

Opuntia occidentalis is found along the coast of southern CA…

Opuntia semispinosa

Griffiths, Bulletin of the Torrey Botanical Club 43(2): 89, 1916 Holotype Original Citation What is Opuntia semispinosa? Opuntia semispinosa is a coastal prickly pear cactus from southern California and Mexico that has been variously lumped into O. occidentalisO. littoralis, or even other opuntias of coastal California. We accept it as a stand-alone species. Details Plants may reach 1 or …

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