Clermontia parviflora, commonly known as Smallflower Clermontia or Hamakua Clermontia, is an evergreen perennial shrub or small tree endemic to the island of Hawaii. It is typically found in montane rainforests and bogs at elevations ranging from 2,000 to 4,500 feet. This species grows at a moderate rate to a typical height and width of 3-6 feet (0.9-1.8 meters). Clermontia parviflora has a distinctive appearance with large, leathery leaves and tubular yellow or green flowers that are quite showy, blooming in the spring and summer months. The flowers are adapted for pollination by native Hawaiian honeycreepers, which are attracted to their nectar.

In cultivation, Smallflower Clermontia is valued for its unique flowers and its ability to thrive in wet conditions, making it suitable for rain gardens or as a specimen in moist, shaded areas. It requires part shade to full shade, consistent moisture, and well-draining, fertile loam soils to flourish. While it is not commonly found in the nursery trade, it is sought after by collectors of native Hawaiian plants and those looking to create a habitat for native birds. Gardeners should be aware that it needs protection from strong winds and may require supplemental water during dry periods.CC BY-SA 4.0