Stems sparsely to moderately pubescent, pubescence of inter­nodes ubiquitous, trichomes eglandular and glandular-capitate. Leaves: petiole 2.8–5 cm, pubescent; blade del­tate to ovate-elliptic, oblong, or suborbiculate, 2.9–24.5 × 2.5–17.5 cm, base cordate, apex acuminate, abaxial surface pubescent, hairs eglandular and glandular, adax­ial surface pubescent, hairs eglandular, colleters 2–4, ca. 0.3 mm. Peduncles to 17 mm, pubescent. Pedicels 0.7–3.7 cm, pubescent. Flowers: calyx lobes lanceolate, 1.6–5.4 × 0.2–1 mm, margins entire, apex obtuse, abaxial surface pubescent to glabrate, adaxial surface glabrous; corolla uniformly green, olive-green, yellow-green, or neon green or multicolored and generally dark maroon to brownish near base and green to yellow-green near tips, subcampanulate at base, tube 1–1.4 × 1–1.5 mm, lobes ovate to elongate-deltate, 2.6–11 × 2–4 mm, slightly lobed at base, glandular swelling frequently present in sinus, apex obtuse, abaxial surface glabrous, adax­ial surface glabrous or pubescent only along right sides; corolline corona reduced to small mounds opposite anthers, glabrous; gynostegial corona prostrate-undulating; style-head 2.6–3.7 mm diam., stipe ca. 0.5 mm; dorsal anther appendages 0.9 × 0.9 mm, apex rounded to truncate, or 2-lobed to emarginate; pollinia ovate, 0.6 × 0.2 mm. Follicles ovoid, 8–15 × 1.5–2.8 cm, surface glabrous or minutely pubescent. Seeds 6–10 × 3–7 mm, distal margin dentate, surfaces somewhat muricate, glabrous, coma white, to 4.5 cm.

Distribution

c, e United States.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Lower Taxa

Gonolobus suberosus var. granulatus, Gonolobus suberosus var. suberosus

Key

1	Corolla lobes multicolored adaxially, generally dark maroon to brownish near base and green to yellowish near tips at anthesis (or uniformly yellowish green to neon green in rare mutants), pubescent or glabrous; dorsal anther appendages dark purple or maroon tinted.	Gonolobus suberosus var. suberosus
1	Corolla lobes uniformly colored adaxially, olive-green at anthesis, glabrous; dorsal anther appendages yellow.	Gonolobus suberosus var. granulatus