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Aztekium ritteri, commonly known as the Aztec Cactus, is a unique Mexican cactus endemic to Nuevo León. Its distinctive ribbed stems, reminiscent of Aztec architecture, were once the sole species within its genus. This slow-growing plant is notable for its endangered status and represents a signific...
Aztekium valdezii is a rare cactus native to Nuevo León, Mexico. Discovered in 2011, it represents the second species within the Aztekium genus. This diminutive cactus, characterized by its wrinkled and ribbed stems and delicate pink flowers, is notable for its endangered status and unique genetic m...
Astrophytum capricorne, commonly known as the Goat Horn Cactus, is a globular succulent native to Mexico’s Coahuila region. Its notable feature is its elongated, spiraling gray-brown spines resembling horns, which contrast with vibrant yellow flowers featuring red throats. This cactus is popular amo...
Eriosyce aurata is a globular to short-columnar cactus native to central Chile, recognized by its dense golden-yellow spines and woolly crown bearing small yellowish flowers.
The largest Astrophytum species, native to central Mexico, growing to 1 meter tall with golden spines, and the first in its genus to be scientifically described, in 1827.
Native to Brazil, the Balloon Cactus is a globular succulent notable for its ribbed, blue-green body and golden spines, originally described by F. Ritter in 1963.
An Indo-Pacific wentletrap so coveted by 18th-century European collectors that counterfeit specimens molded from rice paste were sold as authentic shells.
Acanthocalycium violaceum is a globular cactus from Argentina notable for its sharp spines and large violet to purple flowers that bloom in the summer.
Eulychnia acida is a columnar cactus endemic to the coastal Atacama region of Chile, whose sour-tasting fruits have traditionally been fermented to produce a local alcoholic drink.
Weberbauerocereus rauhii is a columnar cactus native to the Andes of Peru, notable for its nocturnal flowers and distinctive golden or brownish spines.
Classified by Britton & Rose in 1920, Lemaireocereus hollianus is a tall, columnar Mexican cactus notable for its heavily spined, ribbed green stems.
A brown kelp (Costariaceae) of the North Pacific from Japan to California, immediately identifiable by five prominent parallel ribs running the full length of its broad blade.
A brown alga (Costariaceae) of the North Pacific from Alaska to British Columbia, distinguished from the related Costaria by bearing three ribs rather than five on its flattened blade.
