Cyrtosperma macrotum Becc. ex Engl.

Moderately robust herbs to 1.3 m high, rhizome plagiotropic or very short, to 6 cm diameter. Leaves 3-several, hastate to sagittate; petioles divergent from the base, prickly, mottled or not; blades to c. 90 cm long, usually less, to c. 50 cm wide, held horizontally or with the posterior lobes down, ± coriaceous, armed beneath (sometimes heavily) and sometimes on the margins, often with all the blades orientated in the same direction, 1° and 2° venation (sometimes very) prominent beneath; costae of anterior lobe curvinerved to pinnately arranged; posterior lobes markedly exceeding the anterior one, asymmetrically ovate to broadly lanceolate, naked in the sinus for up to c. 5 cm. Inflorescence solitary, occasionally 2 consecutively, on peduncles similar to and slightly exceeding the petioles. Spathe narrowly lanceolate, to c. 15 cm long, 3 cm wide (flat), occasionally spiny at the base and along midline without, white-yellowish green/brown to purple, insertion shallowly cup-like, or with the margins deflected or shortly decurrent on the peduncle; spadix c. 6-12 cm long, c. 5 mm wide (fl.), pale yellow to green, free-stipitate or with a stipe adnate to the spathe or sessile. Flowers hexamerous or tetramerous or mixed (then sometimes with some pentamerous); ovule solitary, ± basal; anthers not exserted from the tepals at male an-thesis; fruit sessile, ovoid, orange; seed with smooth testa, campylotropous, asymmetrical in lateral view.