Plants 180-300 mm high. Stem usually with 2 to 4 branches, flexed outward above, velvety to silky hairy. Leaves lanceolate, pleated, softly hairy, reaching to ± middle of spike. Spike inclined, 4-to 8-flowered; bracts green with dry rust-coloured tips, silky hairy, 12-15 mm long, inner slightly shorter than outer, divided to base. Flowers zygomorphic, creamy yellow, lower lateral tepals deep yellow, violet-scented; perianth tube 35-50 mm long, slender and cylindric below, with long wide throat, 15-25 mm long; tepals unequal, dorsal 27-32 mm long, inclined toward ground, lower tepals joined to upper laterals for ± 5 mm, lower three 22-25 mm long. Stamens unilateral; filaments arched, 28-30 mm long; anthers 6-7 mm long. Ovary densely hairy; style dividing below or opposite base of anthers, branches ± 4.5 mm long, expanded at apex.
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Like B. odorata but flowers larger, with a tube 35-50 mm long, narrow at base and wider in upper 15-25 mm.
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