Clumps of narrow, evergreen leaves with threadlike fringe along edges give rise to tall, branching inflorescences set with many tubular flowers that attact hummingbirds. Foliage clumps resemble yucca or coarse grass. Plants require little maintenance aside from removal of spent flower clusters. Estab- lished plants can get by with little summer water and aren't fussy about soil as long as it is well drained.
H. campanulata. From northern Mexico. Bright green leaves form tight clumps of rosettes to 3 ft. high and wide. In summer, stems to 9 ft. tall bear bell-shaped, light pink flowers about 1 in. across.
H. funifera. From northern Mexico. Clumps to 6 ft. tall, 68 ft. wide. Stems to 15 ft. high bear inch-wide, greenish white flowers in late spring or early summer.
H. nocturna. From northern Mexico. Foliage clump 5 ft. tall, 6 ft. wide. In late spring and early summer, blossom spikes, to 12 ft. high, bear many 1-in., night-blooming, slightly fragrant, greenish lavender flowers.
H. parviflora. RED YUCCA. Zones US, MS, LS, CS, TS; USDA 6-11. From Texas and New Mexico. Foliage clumps 34 ft. tall and wide produce 5-ft. stalks carrying many rose-red to bright red, 1 14-in. flow- ers from late spring through midsummer, sometimes into early fall. Especially heat tolerant, thriving even in reflected heat. Excellent container plant. A form with creamy yellow flowers is available.