In the fertile double flowered forms flowers were observed on the same plant with (1) marked doubling and staminoid
and deformed carpels without ovules, (2) sterile anthers or pollen and undeveloped ovules, often with normal styles, (3) fertile pollen and undeveloped ovules, or vice-versa and (4) fertile pollen and developed ovules.
5 X 4-6 mm; petals yellow, two external, oblong to ovate, 16-31 X 9-26 mm, two internal, oblong to obovate, 14-30 X 9-19 mm, cuculus orbicular, bent around the androecium and gynoecium, 17-25 X 11-20 mm; stamens yellow to vinaceous, 8-18 mm long; staminoids yellow, 4-5 mm long; ovary yellow, setulose, 16-28 mm long; style green, 3-5 mm long.
5 mm long; staminoids yellow, 3-5 mm long; ovary yellow, tomentose, 5-8 mm long; style green, 3-4 mm long.
5-16 mm; stamens yellow, 5-13 mm long; staminoids, 2-5 mm long; ovary yellow, strigose, 8-12 mm long; style light yellow, 8-12 mm long.
hypogynus that stamens look like staminoids
, carry almost no pollen grains and lack dehiscence, making the spikelet functionally female and the plant monoecious (Norrmann & Quarin, 1991).