In 2008, a mass flowering of Shibataea chinensis Nakai, which is cultivated in the Fuji Bamboo Garden, Japan, was observed. On February 3, a majority of the culms bore young inflorescences on their nodes. On March 23, the inflorescences were in full bloom with green leaves. Flowering terminated around April 20. All the inflorescences withered although the anthers protruded from the apices of withered florets, and did not bear any fruits. Even after flowering, the flowered culms remained verdant with green foliage leaves and bore new leaf buds on the axils. The inflorescence of S. chinensis was an indeterminate compound pseudospikelet. It comprised six secondary pseudospikelets, three tertiary pseudospikelets, and three spikelets, where the former two had each one prophyllate bud. A hermaphrodite floret is composed of a lemma, a palea, 3 lodicules with unicellular long hairs and bi- or tri-cellular microhairs on the margin, 3 stamens with 10-mm-long anthers and an ovule with 3 papillose stigmas.