Spathiphyllum 'Sweet Lauretta'Long petioles, large dark glossy leaves and white cupped spathes define Spathiphyllum 'Sweet Lauretta'. This larger Sweet series peace lily forms an upright to broad upright basal clump, with narrow elliptic to narrow ovate leaves and inflorescences held above the foliage on long peduncles. Open spathes can carry a sweet fragrance, while the larger leaves and tall petioles create a broad, full crown.