Occasional, one dead next to it, plant single, flowering stalk 5 m tall, inflorescence narrowly paniculate with 13 short lateral branches down 1/3 of stalk, flowers with ovary, neck, tube chartreuse green, tepals, filaments, anthers, style yellow, tepals erect-ascending to open, flower measurements after Gentry (1982) in mm: tl=40, o=20x5, n=4, tu=3.2x12, fil ins=2, fil=37, a=17, pre-dehiscent, outer tepal 15.5x3, inner tepal 15.5x4, sty=35.