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FOC | Family List | FOC Vol. 22 | Poaceae | Deyeuxia

17. Deyeuxia pyramidalis (Host) Veldkamp, Blumea. 37: 230. 1992.

野青茅 ye qing mao

Calamagrostis pyramidalis Host, Icon. Descr. Gram. Austriac. 4: 28, 1809; Agrostis arundinacea Linnaeus; Arundo sylvatica Schrader, nom. illeg. superfl.; C. arisanensis Honda; C. arundinacea (Linnaeus) Roth; C. arundinacea var. brachy-tricha (Steudel) Hackel; C. arundinacea var. ciliata Honda; C. arundinacea var. hirsuta Hackel; C. arundinacea var. latifolia (Rendle) Kitagawa; C. arundinacea var. robusta (Franchet & Savatier) Honda; C. arundinacea var. sciuroides (Franchet & Savatier) Hackel; C. austrojeholensis Honda; C. brachytricha Steudel; C. brachytricha var. ciliata (Honda) Y. Ibaragi & H. Ohashi; C. collina Franchet; C. formosana Hayata; C. matsu-dana Honda; C. morrisonensis Hayata; C. niitakayamensis Honda; C. nipponica Franchet & Savatier; C. robusta Franchet & Savatier; C. sciuroides Franchet & Savatier, nom. hom. illeg.; Deyeuxia ampla Keng; D. brachytricha (Steudel) Chang; D. collina (Franchet) Pilger; D. formosana (Hayata) C. C. Hsu; D. henryi Rendle; D. hupehensis Rendle; D. matsudana (Honda) Keng; D. sylvatica Kunth, nom. illeg. superfl.

Perennial, tufted, sometimes shortly rhizomatous. Culms erect, slender or robust, (40–)100–150 cm tall, 2.5–5 mm in diam., 2–3-noded. Leaf sheaths glabrous to densely pubescent, or sheath-collar pilose; leaf blades flat or involute, 5–60 cm, 2–12 mm wide, smooth, scabrid or pubescent; ligule 4–13 mm, obtuse or lacerate. Panicle contracted to slightly open, lanceolate-ovate in outline, 6–35 × 1–10 cm; branches in whorls, ascending, erect or appressed, 1–2 cm; pedicels scabrid. Spikelets 3–5(–6.5) mm, yellowish green or purplish green; glumes lanceolate, subequal or lower glume slightly longer than upper, 1–3-veined, scabrid, apex acute; callus hairs 1/5–2/5 length of lemma; lemma 3.8–6.5 mm, subequal to glumes, scabrid, apex erose; awn arising from ca. lower 1/5 of lemma, 7–12 mm, geniculate with twisted column; palea as long as or slightly shorter than lemma; rachilla (0.5–)1.5–2 mm, including hairs 2.5–4 mm. Anthers (1.3–)2–3 mm. Fl. and fr. Jun–Oct.

Grassy slopes, open woods; 100–4200 m. Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hebei, Henan, Heilongjiang, Hubei, Hunan, Jilin, Jiangsu, Jiangxi, Liaoning, Nei Mongol, Qinghai, Shaanxi, Shandong, Shanxi, Sichuan, Taiwan, Xinjiang, Xizang, Yunnan, Zhejiang [Japan, Kashmir, Korea, Pakistan, Russia; Europe].

This is a highly polymorphic complex, with many local variants.

The name Deyeuxia sylvatica Kunth, based on Arundo sylvatica Schrader (1806), is illegitimate because Schrader cited Agrostis arun-dinacea Linnaeus (1753) in synonymy. Varietal combinations under D. sylvatica should be transferred to D. pyramidalis if it is wished to maintain them (D. sylvatica var. borealis Rendle, var. brachytricha (Steudel) Rendle, var. hirsuta (Hackel) Rendle, var. latifolia Rendle, var. ligulata Rendle, and var. sciuroides (Franchet & Savatier) Rendle).

The name Deyeuxia arundinacea P. Beauvois is often presumed to be based on Agrostis arundinacea Linnaeus, but this is not the case. In fact, D. arundinacea is a synonym of the Mediterranean grass Am-pelodesmos mauritanicus (Poiret) T. Durand & Schinz. Varietal combinations under D. arundinacea should be transferred to D. pyramidalis if it is wished to maintain them (D. arundinacea var. borealis (Rendle) P. C. Kuo & S. L. Lu, var. brachytricha (Steudel) P. C. Kuo & S. L. Lu, var. ciliata (Honda) P. C. Kuo & S. L. Lu, var. hirsuta (Hackel) P. C. Kuo & S. L. Lu, var. latifolia (Rendle) P. C. Kuo & S. L. Lu, var. ligulata (Rendle) P. C. Kuo & S. L. Lu, var. robusta (Franchet & Savatier) P. C. Kuo & S. L. Lu, and var. sciuroides (Franchet & Savatier) P. C. Kuo & S. L. Lu).

The name "Calamagrostis zhongdianensis L. Liou" (Vasc. Pl. Hengduan Mts. 2: 2235. 1994) belongs here, but was not validly published because no Latin description was provided.


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