Trillium kurabayashii, commonly known as Giant Purple Wakerobin, is a deciduous perennial herb that thrives in the understory of mixed evergreen and deciduous forests, as well as in moist, shaded bogs in California and Oregon. It is characterized by a whorl of three large, broadly ovate leaves and a striking solitary flower. The flower, which blooms in early to mid-spring, is notable for its deep purple to reddish petals, lack of a stalk, and its three sepals, stamens, and carpels, which contribute to its symmetrical, trimerous appearance. The plant typically reaches a height and width of 1-2 feet.

Giant Purple Wakerobin is valued for its large, showy flowers and its ability to add a splash of color to shady garden spots. It is often used in woodland gardens, naturalized areas, and as an understory plant in shaded borders. While it prefers part shade to full shade, it requires consistently moist soil with good drainage to thrive. It is not drought-tolerant and should be watered regularly during dry periods. The plant’s historical cultivation success is attributed to Gilman Keasey, who propagated it from seed, resulting in a significant increase in available plants by 1968. Despite its beauty, Trillium kurabayashii can be susceptible to slug and snail damage, and over-collection in the wild has led to conservation concerns. Gardeners are encouraged to purchase from reputable nurseries to avoid contributing to the depletion of native populations.CC BY-SA 4.0