Opuntia cespitosa

Rafinesque, Bulletin Botanique 2: 216, 1830 Herbarium (submitted as O. humifusa); Herbarium (submitted as O. humifusa); Herbarium; Herbarium; Herbarium (submitted as O. humifusa); Herbarium; Herbarium; Herbarium; Herbarium See O. humifusa   See O. lata    See O. mesacantha What is Opuntia cespitosa? Opuntia cespitosa is a prickly pear included in the O. humifusa group of cacti (O. humifusa s.l.). O. cespitosaRead moreOpuntia cespitosa

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. Details Opuntia stricta is a coastal prickly pear cactus that occurs on the shores … Read moreOpuntia stricta

Opuntia polyacantha

Haworth, Supplementum Plantarum Succulentarum 82, 1819 What is Opuntia polyacantha? Opuntia polyacantha is a variable prickly pear cactus ranging from Mexico near CA, to TX, to the Rocky Mountain states and the Great Plains, and north into Alberta and Saskatchewan. This prickly pear cactus has been observed in dry areas in MN and MO. This … Read moreOpuntia polyacantha

Opuntia Web

Introduction Last updated December 6, 2018 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 … Read moreOpuntia Web

Opuntia macrorhiza

Engelmann, Boston Journal of Natural History 6: 206, 1850 Holotype; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Print (Britton and Rose, v1 1919, plate XXVIII); Print (Addisonia, 1916, plate 19) See O. cespitosa What is Opuntia macrorhiza? Opuntia macrorhiza is a small, prostrate prickly pear cactus, seldom reaching 15 inches in height or more than 50-100 cm across. … Read moreOpuntia macrorhiza

Opuntia humifusa

(Rafinesque) Rafinesque, Flora Medica (or Manual of the Medical Botany of the United States of North America) 2: 247, 1830 Herbarium; Herbarium; Herbarium (as O. cespitosa); Herbarium (as O. cespitosa); Herbarium (as O. cespitosa); Herbarium; Herbarium; Herbarium; Drawing (Curtis’s Botanical Magazine, vol. 50: pl 2393, 1823 [as Cactus opuntia]); Drawing (Audubon, Birds of America [double elephant folio edition, plate 94, as … Read moreOpuntia humifusa

Opuntia gilvescens

Griffiths, Annual Report of the Missouri Botanical Garden 20: 87, 1909 Holotype; Herbarium (submitted as O. phaeacantha var major); Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; O. gilvescens is related to O. camanchica O. gilvescens is related to O. phaeacantha What is Opuntia gilvescens? Opuntia gilvescens is a widespread, medium-sized cactus. It … Read moreOpuntia gilvescens

Opuntia fragilis

(Nutt.) Haworth, Synopsis plantarum succulentarum 82, 1819 Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium What is Opuntia fragilis? Opuntia fragilis is one of the smallest opuntias in the United States. It is found throughout the Mountain West and the Midwest, and it is very cold hardy. Details Dr. Eric Ribbens writes: Opuntia fragilis (Nutt.) … Read moreOpuntia fragilis

Opuntia orbiculata

Salm-Dyck ex Pfeiffer, Enumeratio diagnostica cactearum hucusque cognitarum 156, 1837 Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium (unless indicated otherwise, all herbarium specimens were submitted  as O. engelmannii); Herbarium (O. dillei); Herbarium; Painting; Painting What is Opuntia orbiculata? Opuntia orbiculata is a large prickly pear cactus that is found over much of the West. It may … Read moreOpuntia orbiculata

Opuntia engelmannii

Salm-Dyck ex Engelmann, Boston Journal of Natural History 6(2): 207, 1850 Isotype (O. gregoriana); Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium; Herbarium See O. lindheimeri See checklist of differences between O. lindheimeri and O. engelmannii What is Opuntia engelmannii? Opuntia engelmannii (including O. gregoriana) is a common and large prickly pear. It has been confused with other large cactus … Read moreOpuntia engelmannii