Prunus spinosa Prunus spinosa Prunus spinosa, called blackthorn or sloe, is a species of flowering plant in the rose family Rosaceae. It is native to Europe, western Asia, and locally in northwest Africa. It is also locally naturalised in New Zealand, Tasmania and eastern North America. "Prunus spinosa" is a large deciduous shrub or small tree growing to tall, with blackish bark and dense, stiff, spiny branches. The leaves are oval, long and broad, with a serrated margin. The flowers are about in diameter, with five creamy-white petals; they are produced shortly before the leaves in early spring, and are hermaphroditic and
Prunus 'Climax' Prunus 'Climax' 'Climax' is a "Prunus" cultivar, considered to be a plum. It was introduced in 1899 by plant breeder Luther Burbank. Burbank devoted a lot of work to hybridizing two plum species, the apricot plum or Simon plum "Prunus simonii" and the Japanese plum "Prunus salicina". He developed a number of cultivars from the hybrid, of which 'Climax' was particularly notable for its importance to the fruit shipping industry of California. The 'Climax' tree is less productive than some other plum cultivars. The fruit is extremely large and heart-shaped, with yellow flesh that is sweet and very juicy. The