Macnab cypress
/məkˌnab ˈsʌɪprɪs/(also Macnab's cypress)
noun
A small cypress tree, Cupressus macnabiana (family Cupressaceae), with grey-green leaves, native to northern California.
Origin
Late 19th century. In some forms from the genitive of the name of James MacNab, curator of the Royal Botanic Garden, Edinburgh + cypress.