J. Arnold Arbor. 23: 224. 1942.
Herbs or subshrubs, 1–3 m. Roots thickened. Stems erect, terete when young; nodes not swollen; leaf and stipule-scars not elevated. Leaves: stipules lanceolate, entire; petiole 2–9 cm; blade basally attached, 5–7-lobed, lobes with rounded secondary lobes distal to middle or with 2 pairs of rounded secondary lobes of nearly equal width proximal and distal to middle, median lobe 4–11 cm, margins neither thickened nor revolute, entire, apex acuminate, surfaces glabrous, abaxial smooth. Inflorescences axillary, racemes, to 8 cm. Pedicels: staminate 4–9 mm; pistillate to 15 mm in fruit, downcurved. Staminate flowers: calyx campanulate, 7–15 mm, lobes erect or spreading; stamens 10. Capsules 1.5 cm, nearly smooth, not winged. Seeds globose, 12 mm.
Phenology: Flowering Jul–Oct.
Habitat: Desert scrub, thorn scrub, oak woodlands, oak grasslands.
Elevation: 100–2000 m.
Ariz., Mexico (Chihuahua), Mexico (Sinaloa), Mexico (Sonora)
In the flora area, Manihot davisiae is limited to Pima and Santa Cruz counties.