cochal. It is a triploid plant, which helps substantiate that it is a hybrid between the diploid M. cochal and the tetraploid B. emoryi. It has light-yellow flowers, and is known only from a few plants. Its generic name comes from those of its parents (Mytillocactus and Bergerocactus) and its specific epithet, "lindsayi", is in honor of the botanist George Lindsay. The cactus was first found by Lindsay near El Rosario, Baja California, in 1950 while on a trip to look for Pacherocactus. Specimens were cultivated at the Desert Botanical Garden, finally blooming in 1961 and formally described the following year. × Pacherocactus orcuttii (K. Brandegee) G.D. Rowley (Orcutt hybrid cactus) A naturally occurring intergeneric hybrid with Pachycereus pringlei, discovered near El Rosario, Baja California. The plant's generic name is formed from those of its parents (Pachycereus and Bergerocactus). Sometimes it can be found listed as Pachycereus × Bergerocactus. It can grow to a height of about 3.5 m and a diameter of about 10 cm. The cactus does not thrive below 10 °C. Its flowers are green-brown in color and of about 4 cm in size. Distribution, habitat, and conservation The plant is near-endemic to Baja California, with the exception of populations on Santa Catalina Island, San Clemente Island, and San Diego, California. The populations remaining in San Diego are disjunct, located in Border Field State Park, Torrey Pines State Park, and Cabrillo National Monument, as the urban development in San Diego has relegated many species to these protected areas. Other rare species that inhabit these enclaves of maritime succulent scrub in San Diego include Shaw's Agave, the Torrey Pine, the Tapertip liveforever, cliff spurge, and the San Diego barrel cactus. Aside from urban development, the plant is also threatened by collecting and feral goats. The species is represented on the two of the southern California Channel Islands. On San Clemente Island, the golden cactus is found inhabiting rocky canyon walls. In Baja California, the species continues from the border south into the succulent scrub to El Rosario. It occurs on numerous islands off the coast; however, climate change and other anthropogenic influences are threatening the insular populations. On Isla San Martin, a volcanic island off of the San Quintin Bay, only a single clump of the cactus is left. Gallery See also Flora of the maritime succulent scrub: Agave shawii Dudleya Acalypha californica References External links CalFlora Database: