纤维马唐Digitaria fibrosa (Hack.) Stapf

科名：禾本科 Gramineae

属名：马唐属 Digitaria

《中国植物志》第10(1)卷312页
  5.纤维马唐（禾本科图说）
  Digitaria fibrosa (Hack.) Stapf in Kew Bull. 1912: 428. 1912: Henr. Monogr. Gen. Digitaria 249. 1950; Bor in Webbia 11: 327. 1956;中国主要植物图说 禾本科696, 图640, 1959; Bor, Grass. Burro. Ceyl. Ind. Pakist. 301. 1960;中国高等植物图鉴5: 170, 图7169, 1976.——Panicum fibrosa Hack. in Oesterr. Bot. Zeitschr. 51: 330. 1901. ——Digitaria setifolia auct. non Stapf 1889: Rendle in Journ. Linn. Soc. Bot. 36: 326. 1906.

《Flora of China》 Vol. 22 (2006)
Digitaria fibrosa  (Hackel) Stapf
纤维马唐   xian wei ma tang
Panicum fibrosum Hackel, Oesterr. Bot. Z. 51: 330. 1901; Digitaria fibrosa var. yunnanensis (Henrard) L. Liu; D. yun-nanensis Henrard.
Perennial forming a dense tussock. Culms surrounded at base by fibrous remains of old leaf sheaths, erect, 30–50 cm tall. Leaf sheaths pilose to hirsute; leaf blades linear, flat, up to 25 × 0.25–0.4 cm, subglabrous, pilose or hirsute, apex acuminate; ligule ca. 0.5 mm. Inflorescence subdigitate, axis usually glabrous, hairy in hirsute specimens; racemes 2–4, suberect, 4–11 cm; spikelets paired or ternate, loosely arranged; rachis slenderly triquetrous, not winged; pedicels tips slightly swollen. Spikelets oblong-lanceolate, 2.8–3.3 mm, pilose with white or brownish, minutely capitate hairs; lower glume very small, subrounded; upper glume ca. 4/5 as long as spikelet but narrow, 3-veined, pilose; lower lemma as long as spikelet, 7-veined, hairiness variable, usually glabrous and purple-tinged on either side of midvein, 2nd intervein space and margins usually pilose, rarely pilose throughout; upper lemma dark brown to purplish black. Fl. and fr. May–Aug.
Mountain grasslands. Fujian, Guangdong, Guangxi, Sichuan, Yunnan [Laos, Myanmar, Thailand].
Digitaria fibrosa is sometimes included in D. setifolia Stapf. Both have an identical habit, inflorescence, and spikelet structure, but D. seti-folia has narrower, inrolled, filiform leaves and is confined to South Africa. Digitaria fibrosa is maintained here on account of this difference and the disjunct distribution.

This is the only species in China with a tussocky, fibrous base. Hairiness of the leaves and spikelets is variable, but the loose, narrowly ascending racemes of rather large spikelets with dark fertile florets are easily recognizable.