Genus Stewartia Species pseudocamellia Cultivar Common Name Japanese Stewartia Patent ID Height 20 to 30 Feet Spread 20 to 25 Feet Habit Pyramidal rounded tree. Slow to moderate growth rate. Zone 4 to 7 Culture Partial shade. Flower White, 2-3" across, cup-shaped. June-July. Flower Color Foliage Dark green, 2-4" long. Finely serrated. Fall color is reddish-purple to maroon. Deciduous. Category: Flowering Tree Description Bark exfoliates to reddish-brown and orangish-brown.