Platycladus orientalis 'Fleck,' also known in the trade as 'Nana Fleck' (illegitimate because it originated after 1959), 'J.W. Versteege,' and 'Versteege Flash' (provisional names that have since been dropped).
Description. A white-variegated, ovoid-conical dwarf selection of Chinese arborvitae with grass-green to yellow foliage irregularly spotted with creamy-white flecks. Annual growth is less than an two inches (7-10 cm) a year, producing small shrub, approximately 2.5 feet tall by 1 foot wide (70 x 30 cm) after 10 years in the landscape. [description courtesy of Encyclopedia of Conifers, Auders & Spicer, ©2012]
Origin. 'Fleck' was introduced in the 1980s by Ferny Creek Nursery in Melbourne, Victoria, Australia. It originated from a branch mutation on a specimen of 'Aurea Nana.' Stanley & Sons Nursery, Boring, Oregon is credited for the U.S. introduction.