Plants 100-250 mm high. Stem inclined, usually 2-to 4-branched, densely hairy. Leaves lanceolate, to 20 mm wide, soft and lightly pleated, softly hairy. Spike several-flowered; bracts green with brown tips, densely long-hairy, 15-25 mm long, outer obtuse-acuminate, inner slightly shorter than outer, divided to base. Flowers zygomorphic, violet with whitish or pale violet median streaks on lower lateral tepals; perianth tube cylindric, curved near apex, 30-40 mm long; tepals unequal, dorsal suberect, 22-26 mm long, lower tepals obtuse to obtuse apiculate, 17-21 mm long, joined to upper laterals for ± 4 mm, forming a fairly prominent lower lip. Stamens unilateral; filaments arcuate, ± 12 mm long; anthers ± 6 mm long, dark blue black. Ovary densely hairy; style dividing opposite upper thirds of anthers, branches ± 4 mm long, tips unusually large and undulate, overtopping anthers.
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Like B. ecklonii but tepals narrow, leaf tips almost obtuse, flowers dark purple with narrow white streaks on lower tepals, and broad style branches.