细根茎甜茅Glyceria leptorhiza (Maxim.) Kom.
细根茎甜茅Glyceria leptorhiza (Maxim.) Kom.
6．细根茎甜茅（拟）图版40：1-4
Glyceria leptorhiza (Maxim.) Kom. in Acta Hort. Petrop. 20: 307. 1901. et in Fl. URSS 2: 452, Pl. 34. fig. 4-5. 1934; Tzvel. in Fed. Poac. URSS 544. 1976. ——Glyceria fluitans var. leptorhiza Maxim. in Mem. Sav. Etr. Petersb. 9: 320. 1859.
多年生，具匍匐细根茎。秆疏丛，直立，高20-50厘米，径1-2毫米，具3-5节。叶鞘闭合近口部，光滑，基部者有时撕裂，长于节间，上部者短于节间；叶舌透明膜质，长约1毫米，先端具不规则齿裂；叶片扁平，长7-10厘米，宽1.5-2.5毫米，直立，顶端急尖，两面光滑。圆锥花序狭窄，稀疏，长6-15厘米，每节具1-3分枝；分枝光滑，直立紧贴主轴或上升，其上着生1-4个小穗；小穗绿色微带紫色，细长，两侧压扁，含5-9（11）小花，长8-14毫米，宽约3毫米；颖膜质，卵状长圆形，顶端尖，光滑，具1脉，第一颖长2-3毫米，第二颖长3-4毫米；外稃草质，长圆形，顶端稍钝，及边缘具狭窄膜质，粗糙，第一外稃长3-4毫米，具7脉；内稃稍长于外稃，顶端微凹，具2个极短刺尖，背面稍弓曲，具2脊，脊上粗糙；雄蕊3，花药黄色微带红紫色，长约1.3毫米。颖果黑褐色，长约1.5毫米，具长腹沟。花果期7-8月。染色体2n＝20（Probatova et Skoklovskaya 1981）。
产黑龙江北部。生于河岸浅水中、灌丛下、沼泽草地上。分布于俄罗斯西伯利亚及远东沿阿穆尔河流域。模式标本采自黑龙江。
《Flora of China》 Vol. 22 (2006)
Glyceria leptorhiza (Maximowicz) Komarov
细根茎甜茅 xi gen jing tian mao
Glyceria fluitans (Linnaeus) R. Brown var. leptorhiza Maximowicz, Prim. Fl. Amur. 320. 1859.
Perennial, rhizomatous; rhizomes filiform. Culms ascending, 20–50 cm tall, 1–2 mm in diam. Leaf sheaths smooth, upper shorter than internodes; leaf blades flat, thin, 7–10 cm × 1.5–3.5 mm, smooth; ligule 1–3 mm. Panicle narrow, contracted, 6–25 cm, base included in uppermost leaf sheath; branches 1–3 per node, erect, appressed to main axis, smooth, bearing 1–4 spikelets. Spikelets linear, 8–14 mm, florets 5–9, pale green or pinkish; glumes ovate-oblong, 1-veined, lower glume 2–3 mm, upper glume 3–4 mm, apex obtuse; lemmas oblong, 3–4 mm, smooth, 7-veined, upper margins and apex narrowly membranous, apex obtuse; palea slightly longer than lemma, keels wingless, apex emarginate. Stamens 3, anthers 1–1.7 mm. Fl. and fr. Jul–Aug. 2n = 20.
River banks, shallow water, swampy grasslands. N Heilongjiang [Russia (Far East, E Siberia)].
Reports of this species in Japan refer to Glyceria depauperata Ohwi (G. leptorhiza subsp. depauperata (Ohwi) T. Koyama), which differs from G. leptorhiza in having spikelets to 25 mm, florets 7–15, and anthers 0.5–0.7 mm.
科名：禾本科 Gramineae
属名：甜茅属 Glyceria
6．细根茎甜茅（拟）图版40：1-4
Glyceria leptorhiza (Maxim.) Kom. in Acta Hort. Petrop. 20: 307. 1901. et in Fl. URSS 2: 452, Pl. 34. fig. 4-5. 1934; Tzvel. in Fed. Poac. URSS 544. 1976. ——Glyceria fluitans var. leptorhiza Maxim. in Mem. Sav. Etr. Petersb. 9: 320. 1859.
多年生，具匍匐细根茎。秆疏丛，直立，高20-50厘米，径1-2毫米，具3-5节。叶鞘闭合近口部，光滑，基部者有时撕裂，长于节间，上部者短于节间；叶舌透明膜质，长约1毫米，先端具不规则齿裂；叶片扁平，长7-10厘米，宽1.5-2.5毫米，直立，顶端急尖，两面光滑。圆锥花序狭窄，稀疏，长6-15厘米，每节具1-3分枝；分枝光滑，直立紧贴主轴或上升，其上着生1-4个小穗；小穗绿色微带紫色，细长，两侧压扁，含5-9（11）小花，长8-14毫米，宽约3毫米；颖膜质，卵状长圆形，顶端尖，光滑，具1脉，第一颖长2-3毫米，第二颖长3-4毫米；外稃草质，长圆形，顶端稍钝，及边缘具狭窄膜质，粗糙，第一外稃长3-4毫米，具7脉；内稃稍长于外稃，顶端微凹，具2个极短刺尖，背面稍弓曲，具2脊，脊上粗糙；雄蕊3，花药黄色微带红紫色，长约1.3毫米。颖果黑褐色，长约1.5毫米，具长腹沟。花果期7-8月。染色体2n＝20（Probatova et Skoklovskaya 1981）。
产黑龙江北部。生于河岸浅水中、灌丛下、沼泽草地上。分布于俄罗斯西伯利亚及远东沿阿穆尔河流域。模式标本采自黑龙江。
《Flora of China》 Vol. 22 (2006)
Glyceria leptorhiza (Maximowicz) Komarov
细根茎甜茅 xi gen jing tian mao
Glyceria fluitans (Linnaeus) R. Brown var. leptorhiza Maximowicz, Prim. Fl. Amur. 320. 1859.
Perennial, rhizomatous; rhizomes filiform. Culms ascending, 20–50 cm tall, 1–2 mm in diam. Leaf sheaths smooth, upper shorter than internodes; leaf blades flat, thin, 7–10 cm × 1.5–3.5 mm, smooth; ligule 1–3 mm. Panicle narrow, contracted, 6–25 cm, base included in uppermost leaf sheath; branches 1–3 per node, erect, appressed to main axis, smooth, bearing 1–4 spikelets. Spikelets linear, 8–14 mm, florets 5–9, pale green or pinkish; glumes ovate-oblong, 1-veined, lower glume 2–3 mm, upper glume 3–4 mm, apex obtuse; lemmas oblong, 3–4 mm, smooth, 7-veined, upper margins and apex narrowly membranous, apex obtuse; palea slightly longer than lemma, keels wingless, apex emarginate. Stamens 3, anthers 1–1.7 mm. Fl. and fr. Jul–Aug. 2n = 20.
River banks, shallow water, swampy grasslands. N Heilongjiang [Russia (Far East, E Siberia)].
Reports of this species in Japan refer to Glyceria depauperata Ohwi (G. leptorhiza subsp. depauperata (Ohwi) T. Koyama), which differs from G. leptorhiza in having spikelets to 25 mm, florets 7–15, and anthers 0.5–0.7 mm.