DUDLEYA brittonii of succulent plants

      Dudleya brittonii (Giant Chalk Dudleya) A solitary or low slowly-clumping succulent with a beautiful 12 to 18 inch wide rosette of chalky-white leaves surrounding a thick basal stem. Stout silvery-white 1 to 2 foot long spikes arch upward and blush red as the clusters of yellow flowers begin to open in late spring to early summer. Plant in a well-drained soil in full sun along the coast but looks best with part sun in hotter inland locations. This plant can tolerate garden conditions better than the similar looking Dudleya pulverulenta but it is still best if one keeps this plant dry in summer months and particularly avoid overhead irrigation during this time  this plant tolerates going without irrigation in summer in coastal gardens but can look better with a careful infrequent watering below the foliage  does not seem to cup the water the same way that Dudleya pulverulenta does. Hardy to around 15 F or slightly below. This is a great plant for the rock garden, a crack in a rock or wall or as a container specimen. This species is native to coastal areas of the Pacific side of Baja California between Tijuana & Ensenada and on Isla Todos Santos where it grows on cliffs and hilly areas in lava rock and other very porous soils. The genus was named for William R. Dudley (1849-1911) a botanist at Stanford University and the specific epithet honors Nathaniel Lord Britton (1859-1934), botanist and first Director of the New York Botanical Garden. Dr. Britton is also famous for his collaboration with Joseph Nelson Rose of the Carnegie Institute on The Cactaceae, a four-volume work started in 1906 and published in 1924. There are green forms of this plant but the plant we grow is a dusty chalky-white color. The coating that gives this plant this look is a wax-like substance on the surface of the cuticle that gives the leaves one of the highest ultraviolet reflectivity of any plant. This plant was first described by Dr. Donald A. Johansen, a Stanford Botanist, in 1933 in the Cactus and Succulent Journal of American (4:311) and an image graced the cover of the July 1973 issue of the California Horticultural Journal (Vol. 34 No. 3), the predecessor to Pacific Horticulture. Our plants from seed off of a Huntington Botanic Garden collection (HBG 71521) that was from an anonymous seed collection made at Rancho La Salina, between Tijuana & Ensenada.  This description is based on our research and on the observations we have made of this plant as it grows in containers at our nursery, in our own garden and in other gardens. We also will incorporate comments we receive from others and appreciate receiving feedback of any kind from those who have additional information about this plant, particularly if they disagree with what we have written or if they have additional cultural tips that would aid others in growing Dudleya brittonii