Genus Lagerstroemia Species x fauriei Cultivar 'Sioux' Common Name 'Sioux' Crape Myrtle Patent ID Height 15 to 18 Feet Spread 12 to 15 Feet Habit Upright to somewhat spreading, multi-stemmed tree. Moderate growth rate. Zone 7 to 10 Culture Flower Vivid pink, in 6-12 inch panicles. July-September. Flower Color Vivid pink. Foliage Dark green, turning yellow, orange and red in fall. Deciduous. Categories: Crape Myrtle Flowering Tree Description Exfoliating bark is medium grey-brown.