Rhododendron  griffithianum / aucklandii - White Flower  
NOTE: seeds are VERY Tiny  and chaff like

Bright, white, scented, bell shaped flowers, start out pink at first then turn to white, bloom from about April to July and nestle among smooth forest green leaves. Bark has an aged flaking appearance. Provides beauty and color for all seasons.  Keep away from high wind areas.  Great for container growing.
Likes well drained, moist soil, slightly acidic. Prefers some shade. Perfect for woodland gardens. Keep away from high wind areas.
Fun Facts:
1.                 The name Rhododendron comes from the greek words "rodon" which means "rose" and "dendron" which means "tree", hence Rose Tree
2.                Rhododendron was discovered by The 16th century Flemish botanist Charles l'Ecluse
3.                Rhododendron is the national flower of Nepal