甜茅Glyceria acutiflora (Torr.) Kuntze subsp. japonica (Steud.) T.Koyana et Kawano
甜茅Glyceria acutiflora (Torr.) Kuntze subsp. japonica (Steud.) T.Koyana et Kawano
种拉丁名：Glyceria acutiflora (Torr.) Kuntze subsp. japonica (Steud.) T.Koyana et Kawano
种别名 ：
科中文名：禾本科
科拉丁名：Gramineae
属中文名：甜茅属
属拉丁名：Glyceria
国内分布：产江苏、安徽、浙江、江西、福建、河南、湖北、湖南、四川、云南。生于海拔470—1030米的农田、小溪及水沟。
国外分布：分布于朝鲜、日本。模式标本采自日本。
海 拔：470-1030
命名来源：(植物分类学报)[Rev．Gen．Pl． 2: 783. 1891]
中国植物志：9(2):331
形态特征：多年生草本
生 境：路旁湿地、水边
是否栽培：野生
《Flora of China》 Vol. 22 (2006)
Glyceria acutiflora subsp. japonica (Steudel) T. Koyama & Kawano
甜茅 tian mao
Hemibromus japonicus Steudel, Syn. Pl. Glumac. 1: 317. 1854; Glyceria japonica (Steudel) Miquel.
Perennial. Culms ascending from long prostrate base, rooting at lower nodes, 40–70 cm tall, 1.5–3 mm in diam. Leaf sheaths keeled, smooth, longer than internodes; leaf blades flat, flaccid, 5–15 cm × 4–5 mm, slightly scaberulous, apex acute; ligule 4–7 mm. Panicle narrow, 15–30 cm, base often included in uppermost leaf sheath; branches 2 at lower nodes, unequal with one very short, erect, unbranched, bearing only one spikelet, panicle racemelike toward apex. Spikelets linear, cylindrical, 2.5–4.2 cm, florets 7–14, pale green; glumes oblong to lanceolate, membranous, 1-veined, lower glume 2.5–4 mm, upper glume 4–6 mm, apex subacute; lemmas lanceolate, 7–9 mm, herbaceous, 7-veined, scaberulous, apex membranous, acute or slightly tridentate; palea longer than lemma by 0.7–1.4 mm, keels thick, narrowly winged, hyaline between keels down midline, exposed apex 2-toothed. Stamens 3, anthers 0.8–1.3 mm. Fl. Mar–Jun. 2n = 20.
Rice fields, streams, ditches, forming colonies; 400–1000 m. Anhui, Fujian, Guizhou, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Sichuan, Yunnan, Zhejiang [Japan, Korea; North America].
Glyceria acutiflora subsp. acutiflora occurs in E North America. It is tetraploid (2n = 40) and can be distinguished morphologically by its longer anthers (1.5–1.8 mm), narrower, membranous lemma apex, and frequently longer palea (extended up to 2 mm beyond lemma apex).
科名：禾本科 Gramineae
属名：甜茅属 Glyceria
种拉丁名：Glyceria acutiflora (Torr.) Kuntze subsp. japonica (Steud.) T.Koyana et Kawano
种别名 ：
科中文名：禾本科
科拉丁名：Gramineae
属中文名：甜茅属
属拉丁名：Glyceria
国内分布：产江苏、安徽、浙江、江西、福建、河南、湖北、湖南、四川、云南。生于海拔470—1030米的农田、小溪及水沟。
国外分布：分布于朝鲜、日本。模式标本采自日本。
海 拔：470-1030
命名来源：(植物分类学报)[Rev．Gen．Pl． 2: 783. 1891]
中国植物志：9(2):331
形态特征：多年生草本
生 境：路旁湿地、水边
是否栽培：野生
《Flora of China》 Vol. 22 (2006)
Glyceria acutiflora subsp. japonica (Steudel) T. Koyama & Kawano
甜茅 tian mao
Hemibromus japonicus Steudel, Syn. Pl. Glumac. 1: 317. 1854; Glyceria japonica (Steudel) Miquel.
Perennial. Culms ascending from long prostrate base, rooting at lower nodes, 40–70 cm tall, 1.5–3 mm in diam. Leaf sheaths keeled, smooth, longer than internodes; leaf blades flat, flaccid, 5–15 cm × 4–5 mm, slightly scaberulous, apex acute; ligule 4–7 mm. Panicle narrow, 15–30 cm, base often included in uppermost leaf sheath; branches 2 at lower nodes, unequal with one very short, erect, unbranched, bearing only one spikelet, panicle racemelike toward apex. Spikelets linear, cylindrical, 2.5–4.2 cm, florets 7–14, pale green; glumes oblong to lanceolate, membranous, 1-veined, lower glume 2.5–4 mm, upper glume 4–6 mm, apex subacute; lemmas lanceolate, 7–9 mm, herbaceous, 7-veined, scaberulous, apex membranous, acute or slightly tridentate; palea longer than lemma by 0.7–1.4 mm, keels thick, narrowly winged, hyaline between keels down midline, exposed apex 2-toothed. Stamens 3, anthers 0.8–1.3 mm. Fl. Mar–Jun. 2n = 20.
Rice fields, streams, ditches, forming colonies; 400–1000 m. Anhui, Fujian, Guizhou, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Sichuan, Yunnan, Zhejiang [Japan, Korea; North America].
Glyceria acutiflora subsp. acutiflora occurs in E North America. It is tetraploid (2n = 40) and can be distinguished morphologically by its longer anthers (1.5–1.8 mm), narrower, membranous lemma apex, and frequently longer palea (extended up to 2 mm beyond lemma apex).