Fibichia umbellata Koeler var. biflora Beck.

Spikelets 2.5–2.7 mm, with 2 bisexual florets; rachilla between florets ca. 1 mm. Fl. and fr. May–Oct.

Specimens occur sporadically throughout the range of the species in which the rudimentary second floret at the end of the rachilla extension is better developed. In rare cases it may even enclose anthers or be bisexual and only a little smaller than the lower floret. Such spikelets often occur on plants with mainly normal inflorescences and are of negligible taxonomic significance.

Fujian, Jiangsu, Taiwan, Zhejiang [described from Europe].