Description
Key Characters:
Growth Form:
Monocarpic perennials forming succulent rosettes of long-lived leaves, often suckering at the base flowering once after 8–20 years.
Stems:
Acaulescent (without a stem) or short–stemmed.
Roots:
Taprooted.
Leaves:
Leaves simple.
Alternate, spiral rosette.
Blades lanceolate to ovate.
Apex with a long sharp spine.
Base truncate.
Margins ± spinose.
Veins parallel.
Sessile.
Stipules absent.
Flowers:
Flowers in large, terminal, elongate, spicate to racemose or paniculate inflorescences with clusters of flowers subtended by bracts.
Flowers bisexual (perfect).
Tepals 6, greenish yellow, yellow, or orange, subequal, connate at base into a short or long tube, the lobes deltate, linear, or oblong.
Stamens 6, usually long–exserted, inserted near throat of perianth tube.
Ovary inferior, 3-celled; ovules numerous per cell; style awl–shaped; stigma capitate, 3-lobed.
Fruit:
Capsules cylindrical; with loculicidal dehiscience.
Seeds black; obovoid; flat.
Ploidy:
Habitat:
Dry or exposed areas.
Elevation Range: