Blue Tagar, also known as Crape Jasmine or Pinwheel Flower, is a beautiful evergreen flowering shrub native to South Asia, Southeast Asia, and China, with white, pinwheel-shaped flowers that bloom throughout the year. 

Here's a more detailed description:

Botanical Name: Tabernaemontana divaricata 

Common Names: Tagar, Crape Jasmine, Pinwheel Flower, Nil Tagar, Chandni flower, East India Rosebay, Nero's Crown, Moon Beam, Carnation of India 

Plant Characteristics:

• Type: Evergreen flowering shrub 
• Height: Can grow to 3 to 6 feet (1-2 meters) 
• Leaves: Large, shiny, deep green leaves 
• Flowers: White, waxy, pinwheel-shaped flowers that bloom in small clusters on the stem tips 
• Fragrance: The flowers have a pleasing fragrance 
• Blooming Period: Blooms throughout the year, especially in spring, with sporadic blooms in warm climates 
• Habitats: Montane brushwoods and sparse forests 

Care:

• Sunlight: Prefers partial to full sunlight 
• Watering: Moderate watering, keep the soil consistently moist but not waterlogged 
• Soil: Well-draining, rich soil 
• Hardiness Zones: USDA zones 10-11 (best in warm, tropical climates)