Barclaya longifolia This bulb plant is actually a type of lotus, growing long, delicate leaves that are green to deep reddish brown in colour, with attractive undulating features. Healthy specimens of Barclaya longifolia will regularly send up flower stalks that can self-pollinate, eventually producing seeds that can be planted in your aquarium to create new plants. Barclaya longifolia is relatively easy to grow, requiring a nutritious substrate or regular fertilisation, moderate to high lighting and water temperatures of 24c or above.