Tropical plants related to Alocasia and Colocasia. Stemless plants grow to 6 ft. tall and wide and produce big, arrow-shaped leaves on long stalks. Bloom intermittently throughout the year. Flowers are more curious than attractive, resembling those of calla (Zantedeschia), with a central spike surrounded by a usually greenish or yellowish bract. These plants need moist, rich, well-drained soil for best performance. Protect from hard frosts. Indoors, grow in large pots and apply a balanced liquid fertilizer every two to three weeks during active growth; reduce watering and feeding in winter.
X. 'Lime Zinger'. Probable hybrid, but parentage is uncertain. Sometimes sold as X. aurea. Grows quickly to 34 ft. tall, with chartreuse to lime-green, arrow-shaped leaves that can reach 112 ft. long.
X. sagittifolium. ARROWLEAF ELEPHANT'S EAR. Dark green, 3-ft.-long leaves on 3-ft. stalks. Greenish white, 7- to 9-in.-long bracts. 'Lanceolatum' has lance-shaped blackish green leaves. Leaves and leafstalks of 'Yellow Leaf' have a golden cast.
X. violaceum. BLUE TARO. Grows from edible, pink-fleshed tubers. Dark green leaves to 2 ft. long have paler undersides, purplish veins and margins, powdery appearance. Purple, 212-ft. leafstalks have a heavy, waxy, bluish or grayish coating. Yellowish white bracts to 1 ft. long.