For the High Line, Kiwanga presents On Growth, a sculpture of a fern encased in glass. The multi-faceted case is constructed from dichroic glass, which captures and transforms the light that passes through it, changing tone and color as it’s viewed from different vantage points. The work references Wardian cases, a predecessor of the terrarium, which were used to transport uprooted plants to Europe from overseas, allowing those species to continue to thrive amid London’s polluted air in the late 19th century. These enclosures resembled jewelry cases at the time and, similarly, often protected treasures from distant lands. On Growth draws on the colonial histories of institutional and commercial botanic nurseries that heavily influenced the scientific understanding of plants and horticulture of today.