Return to top of page. Basal, narrow, keel-shaped, linear, grasslike. Bell-shaped, petals curving backward at tip. Fibrous or tuberous. Return to top of page.
Blooms are size of a penny, short stems, pink and red common but come in other colors also.
Mature plants leaaves crowed at top of trunk or branches. Return to top of page. Alternate, toothless, lobed, thick or stiff, milky sap. Return to top of page. Mostly opposite, veining, lobed or divided into segments, often strong-smelling.