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Opuntias known for their blue or blue-green color in gardens.

Opuntia caesia

Griffiths, Proceedings of the Biological Society of Washington 29(3): 13–14, 1916 Isotype; Herbarium; Herbarium; Herbarium What is Opuntia caesia? Opuntia caesia is a prickly pear cactus that is larger than O. phaeacantha. It may reach 2 m across and be about 60-70 cm tall with erect branches that rise from spreading, sprawling branches. Details Cladodes on …

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Opuntia tardospina

Griffiths, Annual Report of the Missouri Botanical Garden 22: 34, 1911 Herbarium; Herbarium; Herbarium; Herbarium; Photograph (top photo, Britton and Rose, 1919, v1); Photograph (Britton and Rose, 1919, v1); Painting What is Opuntia tardospina? Opuntia tardospina is a large prickly pear cactus first reported from the Lampasas, TX region. Griffiths reported that this Opuntia was an …

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Opuntia chlorotica gosseliniana

(Weber) Ferguson, Cactus and Succulent Journal (U.S.) 60: 159, 1988 Isotype; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium What is Opuntia chlorotica gosseliniana? O. chlorotica gosseliniana is one of three varieties: chlorotica, santa-rita, and gosseliniana within the O. chlorotica complex as described by Ferguson (1988).  Details These prickly pear cacti may reach 1 m tall …

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Opuntia chlorotica santa-rita

Griffiths & Hare, New Mexico Agricultural Experiment Station Bulletin 60: 64, 1906 Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium What is Opuntia chlorotica santa-rita? Opuntia chlorotica santa-rita is one of three varieties of the prickly pear cactus,  Opuntia chlorotica. The varieties are santa-rita, gosseliniana, and chlorotica (Ferguson 1988). Santa rita is the most …

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Opuntia sp nova aff macrocentra

Introduction This unidentified Opuntia  was observed growing in southern New Mexico, near El Paso, TX, and in adjacent Mexico. This cactus grows with O. macrocentra and is similar to O. macrocentra, but it is more upright, has a different bloom period, and is a slightly taller prickly pear. These opuntias have a gray-blue color, and the spines are pale …

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Opuntia macrocentra

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 292, 1856 [1857] Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium (as O. violaceae macrocentra); Herbarium (as O. violaceae macrocentra); Herbarium (O. macrocentra minor); Herbarium (O. macrocentra minor); Herbarium (O. macrocentra minor) What is Opuntia macrocentra? Opuntia macrocentra is a …

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Opuntia confusa

Griffiths, Proceedings of the Biological Society of Washington 27(6): 28, 1914 Holotype; Isotype; Isotype; Isotype; Isotype; Isotype; Herbarium; Herbarium See O. dulcis What is Opuntia confusa? Opuntia confusa is an interesting prickly pear because some cladodes have spination similar to that of O. engelmannii, whereas other cladodes have spination similar to that of O. dulcis.  Details …

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Opuntia cacanapa (incl O. ellisiana)

Griffiths & Hare, New Mexico Agricultural Experiment Station Bulletin (New Mexico College of Agriculture and Mechanic Arts) 60: 47, 1906 Isotype; Neotype; Holotype (O. cacanapa ‘Ellisiana’); Isotype (O. cacanapa ‘Ellisiana’); Herbarium (O. cacanapa ‘Ellisiana’) O. alta is another arborescent Opuntia What is Opuntia cacanapa? Opuntia cacanapa is a large prickly pear cactus that occurs in Brewster County, TX and …

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Opuntia basilaris

Engelmann & Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 298, 1856   Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Holotype (O. basilaris brachyclada); Herbarium (O.  basilaris brachyclada); Herbarium (O. basilaris brachyclada); Herbarium (O. basilaris brachyclada); Herbarium (O. basilaris longiareolata); Herbarium (O. basilaris longiareolata) Herbarium (O. basilaris longiareolata); Herbarium (O. basilaris longiareolata); Isolectotype (O. basilaris ramosa);  Herbaraium (O. basilaris ramosa); Herbarium (O.

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Opuntia azurea

Rose, Contributions from the U.S. National Herbarium 12(7): 291, 1909 Holotype; Isotype; Isotype; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium (O. azurea diplopurpurea); Holotype; (O. azurea diplopurpurea); Holotype (O. azurea discolor); Herbarium (O. azurea discolor); Herbarium (O. azurea parva); Herbarium (O. azurea parva); Herbarium (O. azurea parva); Herbarium (O. azurea parva); Painting (possible O. azurea) See O. chisosensis See O. macrocentra What is …

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