widespread

These are Opuntias that are found over multiple states.

Opuntia cespitosa

Rafinesque, Bulletin Botanique 2: 216, 1830 Neotype; Herbarium; Herbarium; Herbarium; Herbarium (as O. humifusa); Herbarium (with O. nemoralis); Herbarium (as humifusa); Herbarium (as humifusa); Herbarium (as O. humifusa); Herbarium; Herbarium; Herbarium (as O. humifusa); Herbarium See O. humifusa   See O. lata    See O. mesacantha Original Description What is Opuntia cespitosa? Opuntia cespitosa is a prickly pear in the O. humifusa group of cacti …

Opuntia cespitosa Read More »

Opuntia stricta

(Haworth) Haworth, Synopsis Plantarum Succulentarum 191, 1812 Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium O. stricta has similarities with O. dillenii, another beach prickly pear O. stricta is different from O. anahuacensis, but they are both beach prickly pears. Original Citation What is Opuntia stricta? Opuntia stricta is a coastal prickly pear cactus …

Opuntia stricta Read More »

Opuntia polyacantha

Haworth, Supplementum Plantarum Succulentarum 82, 1819 Original Description What is Opuntia polyacantha? Opuntia polyacantha is a variable prickly pear cactus ranging from Mexico near California, to Texas, to the Rocky Mountain states and the Great Plains, and north into Alberta and Saskatchewan. This prickly pear cactus has even been observed in dry areas in Minnesota …

Opuntia polyacantha Read More »

Opuntia Web

Introduction Updated September 2020 Opuntias are the prickly pear cacti. There are over 90 species of Opuntia in the United States. We describe them here.   Opuntias are unique cacti with unusual shapes and beautiful flowers.  They are part of the opuntiad supergroup of cacti.  The “big three” states for opuntias are Texas, New Mexico, and …

Opuntia Web Read More »

Opuntia macrorhiza

Engelmann, Boston Journal of Natural History 6: 206, 1850 Holotype; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium (O. macrorhiza-like); Herbarium; Herbarium Herbarium; Herbarium; Print (Britton and Rose, v1 1919, plate XXVIII); Print (Addisonia, 1916, plate 19); Print See O. cespitosa, a similar eastern plant O. pottsii can be mistaken for O. macrorhiza. Original Description …

Opuntia macrorhiza Read More »

Opuntia humifusa

(Rafinesque) Rafinesque, Flora Medica (or Manual of the Medical Botany of the United States of North America) 2: 247, 1830 Neotype; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium (as O. calcicola); Herbarium (as Cactus humifusus); Herbarium (as Cactus opuntia) Drawing (Curtis’s Botanical Magazine, vol. 50: pl 2393, 1823 [as Cactus opuntia]); Drawing (Audubon, Birds of America [double elephant folio edition, plate …

Opuntia humifusa Read More »

Opuntia gilvescens

Griffiths, Annual Report of the Missouri Botanical Garden 20: 87, 1909 Holotype (as O. gilvescens); Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium;  Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium. Except where indicated, all specimens  were originally interpreted as O. phaeacanthaO. gilvescens is related to O. camanchica O. gilvescens is related to O. phaeacantha Original Description What is …

Opuntia gilvescens Read More »

Opuntia fragilis

(Nutt.) Haworth, Synopsis plantarum succulentarum 82, 1819 Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Painting Original Citation What is Opuntia fragilis? Opuntia fragilis is one of the smallest opuntias and one of the most cold hardy. It is found throughout parts of the West and the northern Midwest. Frequently O. debreczyi is frequently misinterpreted as …

Opuntia fragilis Read More »

Opuntia orbiculata

Salm-Dyck ex Pfeiffer, Enumeratio diagnostica cactearum hucusque cognitarum 156, 1837 Herbarium (as O. crinifera); Herbarium (seedling);  Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Note: unless indicated otherwise, all herbarium specimens were submitted  as O. engelmannii; Herbarium (O. dillei); Herbarium; (O. dillei); Painting; Painting Original Description What is Opuntia orbiculata? Opuntia orbiculata is a large prickly pear cactus …

Opuntia orbiculata Read More »

Opuntia engelmannii

Salm-Dyck ex Engelmann, Boston Journal of Natural History 6(2): 207, 1850 Lectotype; Isotype (as O. gregoriana); Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium (as O. gregoriana); Herbarium (as O. gregoriana) See O. lindheimeri See checklist of differences between O. lindheimeri and O. engelmannii Original Description What is Opuntia

Opuntia engelmannii Read More »