Anthurium sidneyi Croat & Lingán

Description based on dried material; epiphytic; roots 1-2 mm diam., grayish to pale brown; stem terete; internodes 0.2-0.6 cm long, 0.4-0.7 cm diam.; cataphylls 2-6.2 cm long, 1-ribbed, oblong-lanceolate, membranaceous, brown to greenish brown, the uppermost persisting, then deciduous. LEAVES erect to spreading; petioles 2.3-9.2 (12.6) cm long, 0.1-0.2 diam., U-shaped, shallowly and acutely sulcate, green; sheath 0.2-1.7 cm long; geniculum 0.2-0.5 cm long, inconspicuous; blades subcoriaceous, 8.1-23 cm long, 2.1-6 cm wide, wider at the upper third, oblanceolate to elliptic, attenuate at base, abruptly acuminate to acute at apex, semiglossy above, glossy below; midrib inconspicuously raised on both surfaces; primary lateral veins (5)7-10 per side, almost inconspicuous, straight, departing at 40°-50° angle from the midrib; interprimary veins slightly raised in both surfaces; collective veins arising from one of the 1st or 2nd primary lateral veins, 0.2-0.8 cm from the margins. INFLORESCENCE erect; peduncle weakly ribbed, 4-20 cm long, 0.1 cm diam., greenish, 1.7-2.2 times longer than the petiole; spathe green, membranaceous, 1.9-6.6 cm long, 0.6-1.3 cm wide, ovate-lanceolate, abruptly acuminate at apex, acute at base; the margins forming ca. 50° angle on peduncle; spadix cylindric to slightly long-tapered, green, 3.6-7.2 cm long, 0.2-0.3 cm diam.; flowers rhombic, margins straight, 4 × 2 mm; 3-4 flowers visible in both spirals; pistils 2 mm long; stigmas oblong; stamens ca. 2 mm long, filaments flattened; thecae slightly divaricate. INFRUCTESCENCE erect to spreading; spadix (3) 7.4-10.6 cm long, 0.7-2.3 cm wide; berries green to red, early emergent, ovate with the apex conical, stigmas protruding.