Flapjack Paddle plants are the common name for Kalanchoe Luciae and Kalanchoe Thyrsiflora, but the former is more widely available. There's a slight leaf size difference between them, where the Kalanchoe Thyrsiflora has smaller, cupped leaves. But the most distinctive way to tell them apart is their flowers. Kalanchoe Luciae grows white-ish yellow flowers with no scent. But Kalanchoe Thyrsiflora develops vibrant yellow flowers with a strong fragrance.