Gonatopus clavatus Mayo

Tuber subglobose to turnip-shaped, ± 5 cm. long, 6 cm. in diameter, or cylindric and up to 18 cm. long, 7.5 cm. in diameter. LEAF up to 1.2 m. tall, glabrous; petiole 20-50 cm. long or more, green with purplish shading and greenish-white flecks; pulvinus basal, hidden by subtending cataphylls; blade bi- to tripinnate, up to ± 60 cm. broad; point of attachment of basal pair of pinnae lacking subsidiary leaflets; ultimate leaflets of pinnae (3-)4-13 cm. long, (1-)1.5-4.5 cm. broad, elliptic to oblong-elliptic, acuminate, cuneate at base, mostly sessile, some petiolulate; terminal leaflets sometimes ± decurrent. INFLORESCENCE solitary, appearing before leaf. Peduncle 3-25 cm. long, 0.8-1.2 cm. in diameter, glabrous. Spathe 7.5-12 cm. long; tube subglobose to shortly cylindric, constricted apically, 1.5-2 cm. long, 1.5-2.2 cm. in diameter, reddish to deep wine red on inner surface; limb broadly elliptic to oblong-elliptic, 5.5-9 cm. long, 2.5-7.5 cm. broad, long-cuspidate, reflexing at maturity, green with purplish tingeing or reddish brown. Spadix 7-12 cm. long; staminate part clavate, sometimes subcylindric, 4.8-9.5 cm. long, (0.8-)1.2-1.9 cm. in diameter, creamy yellow, apex rounded, constricted at base, ± contiguous with pistillate part; pistillate part ± cylindric, 1.0-2.5 cm. long, 0.8-1.5 cm. in diameter. Staminate flower: staminal tube overtopping tepals, with anthers partly exserted during anthesis. Pistillate flower: ovary ± laterally compressed, 2-locular; locules uniovulate, placentas at base of septum; stigma discoid, 2 mm. in diameter. INFRUCTESCENCE: Fruit not seen.