Philodendron theofiloanum Calazans

Herb perennial, hemiepiphytic. internodes 0.5–3.0 cm long, cylindrical, glossy green to brownish, drying paler brown; intravaginal squamules absent. Prophyll 10.5–12.0 × 0.7–1.0 cm, navicular, deciduous, 2-keeled, smooth, cream, drying dark brown. Petiole 15.0–32.0 × 0.5 cm, semiterete to terete, glossy green, not striated, drying brown; leaf blade 23–32 × 16–24 cm, broad ovate to ovate, cordate-sagittate, sometimes slightly asymmetric, apex acuminate, acumen 0.5 cm long, curved, margin entire, base cordate, membranaceous, smooth, strongly discolor, glossy green adaxially, paler abaxially, drying chartaceous, striated, brownish, slightly discolor; anterior division 16.5–24.0 cm long, midrib impressed on both faces, drying paler to dark brown, primary lateral veins 5–6 pairs, arising from midrib at 50–60º angle, arcuate to margin, impressed on both faces, drying paler to dark brown on both faces, prominent abaxially, secondary veins conspicuous, parallel to primary veins, numerous, drying evident and prominent on both faces; posterior divisions 6.0–8.0 cm long, cordate, 2–3 primary acroscopic veins, basal denudation 1.5–2.5 cm long. inflorescence 2–3 per floral sympodium; peduncle 15–30 cm long, longer in the external inflorescences, cylindrical, glossy green, striated; spathe 6.5–13.5 cm long, ovate, acuminate, acumen 0.5–1.0 cm long, slightly constricted, externally green towards the apex, dark violet at the base, striated, internally green towards the apex, reddish-green to vinaceous at the base, resin canals internally visible; stipe absent; spadix 6.0–11.5 cm long, thick; fertile male zone 4.5– 7.0 cm long, greenish; intermediate sterile zone 0.3–0.5 cm long, cream; female zone 2.0–3.5 cm long, green; stamens ca. 2.0 mm long, (2–) 4 grouped, prismatic; intermediate staminodes ca. 3.0 mm long, prismatic; gynoecium 3.0–4.0 mm long, ovary barrel-shaped, 7–8-locular, 3–4-ovulated, placentation basal. Berries unknown. Seeds unknown.