3b. Arundinella setosa var. esetosa Bor ex S. M. Phillips & S. L. Chen, Novon. 15: 468. 2005.
无刺野古草 wu ci ye gu cao
Arundinella bidentata Keng; A. hubeiensis D. M. Chen (1983), not A. hupeiensis Keng & X. P. Liou (2002); A. macau-ensis Bor.
Culm nodes glabrous; leaf sheaths and blades glabrous or tuberculate-hispid. Panicle 15–45 cm; branches up to 20 cm; pedicels with long stiff hairs at apex. Spikelets 5–6 mm; glumes glabrous or setose; upper lemma without or with very short lateral bristles; awn 6–10 mm, geniculate, column 1.3–2.6 mm, obviously twisted; callus hairs 1/4–1/3 length of lemma. Fl. and fr. Jul–Nov.
Dry mountain slopes, dry grasslands; 500–2000 m. Fujian, Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangxi, Yunnan, Zhejiang [India, N Myanmar, Nepal].
This name was previously published by Bor (Grasses Burma, Ceylon, India, Pakistan, 425. 1960), but not validly so because no type was indicated.
Arundinella bidentata and A. macauensis are both based on exceptionally hairy specimens densely hispid in all their parts. Arundinella bidentata has short, blunt apical lemma lobes lacking bristles, whereas in A. macauensis the lobes are tipped by very short bristles. Arundinella hupeiensis Keng & X. P. Liou may also belong here, but it has not been possible to see the type (L. Y. Tai & C. H. Chien 465, holotype, N; isotype, HIB).