The Opuntia (prickly pear) cactus is a genus native to the Americas, known for its small spines or glochids that can irritate ...

DR. ERNST'S abnormal fruit of Opuntia, as figured at p. 77, appears to be similar to one described and illustrated by Zuccarini (Abhandl. d. math. phys. Class., B. iv ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. Glass negative stored in Smithsonian ...

Opuntia, the scientific name for the prickly-pear cactus, has spines so sharp that the plant can be used to fence cows. But neither cows nor spines are in evidence at the new Opuntia café in the ...