Alcantarea imperialis rubra
Formerly known as Vriesa imperialis, this dark-red giant can span over 1.5 meters in ten years. The tough, leathery leaves tinge a deep red in bright light. The thick, red flower spike can grow 2.5 meters high, producing hundreds of lightly fragrant, white flowers. Prefers bright light and can withstand relatively cool temperatures.
Manfreda maculosa (Texas tuberose)
An unusually attractive foliage plant with mottled leaves, Manfreda maculosa Texas Tuberose also known as rattlesnake agave is a great choice for rock gardens. It can take full sun to partial shade with a well drained soil mix. Needs very less water. Plants are watered only enough to keep the foliage from shriveling.