The sessile flowers of Glumicalyx flanaganii grow in many-flowered head-like spikes that nod. The five oblong to rounded petal lobes of each flower are brownish orange on the inside, creamy white on the outside, as on the thin, cylindrical corolla tube. The yellow-green hairy bracts with pointed tips that sheath the flowers are the glume-like calyces giving the genus its name. The four stamens with pale anthers protrude from the flower mouth, as does the style that is even longer (Manning, 2009).