Bayog (lbn., Ilk., Sbl., Tag.); bayugin, bukaui (Tag.); botong (Bis.,Bikol); butong (P. Bis.); Kauayan (C. Bis. Ilk., Tag.); kauayan- bayog (Pang.).
Clumping, culms erect and sturdy, more or less 20 m tall. Nodes solitary, nodal line and nodal ridge present, beset with aerial roots especially at lower nodes. Internodes green, smooth, the lower ones up to 30 cm long, 8-12 cm diameter, moderately hollow, walls up to 4.0 cm thick, sometimes almost solid at the base. Culm sheaths trapezoidal, 20 cm long x base 25 cm wide, narrowed upward to truncate, 10 cm wide top, outer surface strongly ribbed, shortly pubescent with brown to black hairs, inner surface weakly ribbed, shiny, glabrous; auricles 2 mm high, margins fringed with brown bristles; ligules 4 mm high, margin weakly lacerate, fringed with brown hairs; blades 4.5 cm long, base 2 cm wide narrowed upward to acute tip, outer and inner surfaces puberulent, margin in folded. Branches usually 1 at each node, sturdy, developing extravaginally, up to 2.0 m long. Leaves as many as 12 to a branchlet, blades linear-lanceolate to oblong-lanceolate, 13-26 cm long x 1.5 to 3.3 cm wide, glabrous or near the sparsely puberulent, base obtuse to rounded margins weakly scabrous, tip acuminate; petiole short, glabrous; sheaths longer than the internodes, glabrous; auricles not distinct; ligule 1 mm, glabrous.
Generally planted in settled areas. Prefers deep fertile soil.
Culms used in building construction and preferred for furniture making vehicle shafts, arched yoke fitted to the neck of carabao. Green culms split and made into ropes. Also suitable for pulp and papermaking. Material for BMI