Definition of pencil tree in English:

pencil tree

noun

  • 1The N. American groundsel tree, Baccharis halimifolia (family Asteraceae (Compositae)), which bears achenes having a long pappus (rare).

  • 2A succulent shrub or small tree of the spurge family, Euphorbia tirucalli, native to southern and tropical Africa and cultivated elsewhere; also called milk-bush.

Origin

Late 19th century; earliest use found in William Miller (c1831–1898).