Stout, erect perennial herb, to 1 m tall; rhizomes 0; stems woody at base, terete, not branched, glabrous. Lvs sessile, 2-5 × 0.8-2 cm, ovate to elliptic, puberulent below, glabrous above, with numerous black intramarginal glands; base ± cordate and ± amplexicaul; apex obtuse. Infl. terminal, a panicle of subcorymbose cymes, dense, glabrous; bracts and bracteoles lanceolate, usually < calyx, with prominent black glandular teeth. Sepals equal, 5-6 mm long, lanceolate-oblong, not accrescent; margin with numerous prominent black glandular teeth; apex sharply acute or shortly acuminate. Corolla 1.5-2.3 cm diam., pale yellow; petals ± obovate, eglandular or nearly so, much > sepals. Stamens in 3 bundles, < petals. Styles 3, recurving, < ovary. Capsule to 8 mm long, ovoid, dry. Seeds 0.7-1.0 mm long, cylindric, reticulate.