Firecracker fern. This is a low-growing shrub, distinctive for its long, drooping, usually leafless stems and the almost continuous clusters of small, lemon-yellow tubular flowers. Each plant produces many branches and is particularly effective when grown in a raised bed or rock garden so that the flower-laden stems hang down. Attractive to butterflies and hummingbirds. Russelia will grow under both moist and dry conditions, but requires full sunlight and occasional pruning to flower well.