Description
Key Characters:
Growth Form:
Annual or perennial herbs, subshrubs, or shrubs to small trees, usually glandular punctate throughout, glabrous or pubescent.
Stems:
Roots:
Leaves:
Leaves simple.
Alternate.
Blades cordate-ovate, sometimes palmately 3-lobed, 5-lobed, or 7-lobed.
Lower surface usually with a gland at base of midvein.
Petioles present.
Stipules present.
Flowers:
Flowers axillary, solitary or in cymes, sometimes forming sympodial branchlets; Involucral bracts 3, usually distinct and inserted above trimerous nectaries, filiform to foliaceous, usually dentate to lacerate, usually persistent.
Flowers bisexual (perfect).
Calyx truncate or 5-toothed to 5-lobed, sepals connate, the lobes valvate in bud.
Corolla actinomorphic to moderately zygomorphic, cream-colored to yellow, rose, or mauve, usually maroon-spotted at base, campanulate to funnelform, the corolla of 5 petals, obovate, distinct from each other but adnate at base to staminal column, convolute in bud.
Stamens 5 to numerous, monadelphous, forming a staminal column, staminal column included, 5-toothed at apex; antheriferous for most of its length or only in upper 1/2; anthers monothecal.
Pollen globose, echinate.
Ovary superior, 3-5-celled, the carpels borne in a single whorl or rarely seemingly superposed whorls, placentation axile; ovules several per cell; style exceeding the staminal column, unbranched, clavate; stigma 3-5-lobed, decurrent.
Fruit:
Loculicidally dehiscent; usually glabrous capsules.
Seeds turbinate; with or without endosperm; usually covered with a close tomentum and sometimes a loose; woolly pubescence (lint; which in some species is the cotton of commerce).
Ploidy:
Habitat:
Elevation Range: