青香茅Cymbopogon caesius (Nees ex Hook. et Arn.) Stapf
青香茅Cymbopogon caesius (Nees ex Hook. et Arn.) Stapf
5.青香茅（华南经济禾草）图版46：8-14
Cymbopogon caesius (Nees ex Hook. et Arn.) Stapf in Kew Bull. 1906: 341, 360. 1906; Blatt. et McCann, Bomb. Grass. 105. 1935; Bor in Journ. Bomb. Nat. Hist. Soc. 51: 912. 1953; 中国主要植物图说. 禾本科834. 图781. 1959; Bor, Grass. Burma Ceyl. Ind. Pakist. 41, 125. 1960; Bor in Rech. f. Fl. Iran. 70: 542. 1970; 海南植物志4: 480. 1977; S. Soen. in Reinwardtia 9: 331. 1977; A. Cope in Nasir. Fl. Pakist. 143: 333. 1982. ——Andropogon caesius Nees ex Hook. et Arn. Bot. Beech. Voy. 244. 1838.——Andropogon schaenanthus var. caesius (Nees ex Hook. et Arn.) Hack. in DC. Monogr. Phan. 6: 610. 1889.——Andropogon schoenanthus var. gracillimus Hook. f. Fl. Brit. Ind. 7: 305. 1897.
多年生草本。秆直立，丛生，高30-80厘米，具多数节，常被白粉。叶鞘无毛，短于其节间；叶舌长1-3毫米；叶片线形，长10-25厘米，宽2-6毫米，基部窄圆形，边缘粗糙，顶端长渐尖。伪圆锥花序狭窄，长10-20厘米，分枝单纯，宽2-4厘米；佛焰苞长1.4-2厘米，黄色或成熟时带红棕色；总状花序长约1.2厘米；总状花序轴节间长约1.5毫米，边缘具白色柔毛；下部总状花序基部与小穗柄稍肿大增厚。无柄小穗长约3.5毫米；第一颖卵状披针形，宽1-1.2毫米，脊上部具稍宽的翼，顶端钝，脊间无脉或有不明显的2脉，中部以下具一纵深沟；第二外稃长约1毫米，中下部膝曲，芒针长约9毫米；雄蕊3，花药长约2毫米。有柄小穗长3-3.5毫米，第一颖具7脉。染色体2n＝20 （Bor，1953），20+2b （Babu，1936），20，22 （Singh F.，1966）。花果期7-9月。
产于广东沿海岛屿、广西、云南及我国沿海地区；生于开旷干旱的草地上，海拔1000米左右。分布于印度、阿富汗、巴基斯坦、斯里兰卡和中南半岛、东非和阿拉伯。模式标本采自我国沿海地区。
植株中含芳香油，精油主成分为香叶醇(geraniol)和柠檬醛(limonene )，惟含量小，常作香水原料。可作牛羊牧草。
《Flora of China》 Vol. 22 (2006)
Cymbopogon mekongensis A. Camus
青香茅 qing xiang mao
Perennial. Culms densely tufted, wiry, 30–80 cm tall. Leaf sheaths glabrous; leaf blades linear, glaucous, 10–25 × 0.2–0.6 cm, glabrous, base narrowly rounded, apex filiform; ligule 0.7–3 mm. Spathate compound panicle narrow, 10–30 cm, spathes densely clustered; spatheoles reddish brown, 1.4–2 cm; racemes reddish brown, 0.7–1.4 cm; rachis internodes and pedicels ca. 1.5 mm, ciliate on margins; pedicel of homogamous pair linear to columnar, not or only very slightly swollen, not fused to internode. Sessile spikelet oblanceolate, 3–4.3 mm; lower glume flat, deeply grooved below middle (appearing as a line or keel on inside), keels broadly winged above middle, veinless or obscurely 2-veined between keels; upper lemma deeply 2-lobed; awn 1.1–1.5 cm. Pedicelled spikelet 3–4 mm. Fl. and fr. Jul–Sep.
Roadsides, hill slopes. Guangdong, Guangxi, Guizhou, Hainan, Hunan, Sichuan, Yunnan, Zhejiang [Laos, Thailand, Vietnam].
Cymbopogon mekongensis is very close to C. caesius (Nees ex Hooker & Arnott) Stapf, which occurs down the eastern side of Africa through Arabia to Pakistan and in S India and Sri Lanka. Cymbopogon caesius differs by the markedly swollen, barrel-shaped pedicel of the homogamous spikelet pair, which is fused to the swollen adjacent internode. It also tends to have greenish yellow rather than reddish inflorescences.
科名：禾本科 Gramineae
属名：香茅属 Cymbopogon
5.青香茅（华南经济禾草）图版46：8-14
Cymbopogon caesius (Nees ex Hook. et Arn.) Stapf in Kew Bull. 1906: 341, 360. 1906; Blatt. et McCann, Bomb. Grass. 105. 1935; Bor in Journ. Bomb. Nat. Hist. Soc. 51: 912. 1953; 中国主要植物图说. 禾本科834. 图781. 1959; Bor, Grass. Burma Ceyl. Ind. Pakist. 41, 125. 1960; Bor in Rech. f. Fl. Iran. 70: 542. 1970; 海南植物志4: 480. 1977; S. Soen. in Reinwardtia 9: 331. 1977; A. Cope in Nasir. Fl. Pakist. 143: 333. 1982. ——Andropogon caesius Nees ex Hook. et Arn. Bot. Beech. Voy. 244. 1838.——Andropogon schaenanthus var. caesius (Nees ex Hook. et Arn.) Hack. in DC. Monogr. Phan. 6: 610. 1889.——Andropogon schoenanthus var. gracillimus Hook. f. Fl. Brit. Ind. 7: 305. 1897.
多年生草本。秆直立，丛生，高30-80厘米，具多数节，常被白粉。叶鞘无毛，短于其节间；叶舌长1-3毫米；叶片线形，长10-25厘米，宽2-6毫米，基部窄圆形，边缘粗糙，顶端长渐尖。伪圆锥花序狭窄，长10-20厘米，分枝单纯，宽2-4厘米；佛焰苞长1.4-2厘米，黄色或成熟时带红棕色；总状花序长约1.2厘米；总状花序轴节间长约1.5毫米，边缘具白色柔毛；下部总状花序基部与小穗柄稍肿大增厚。无柄小穗长约3.5毫米；第一颖卵状披针形，宽1-1.2毫米，脊上部具稍宽的翼，顶端钝，脊间无脉或有不明显的2脉，中部以下具一纵深沟；第二外稃长约1毫米，中下部膝曲，芒针长约9毫米；雄蕊3，花药长约2毫米。有柄小穗长3-3.5毫米，第一颖具7脉。染色体2n＝20 （Bor，1953），20+2b （Babu，1936），20，22 （Singh F.，1966）。花果期7-9月。
产于广东沿海岛屿、广西、云南及我国沿海地区；生于开旷干旱的草地上，海拔1000米左右。分布于印度、阿富汗、巴基斯坦、斯里兰卡和中南半岛、东非和阿拉伯。模式标本采自我国沿海地区。
植株中含芳香油，精油主成分为香叶醇(geraniol)和柠檬醛(limonene )，惟含量小，常作香水原料。可作牛羊牧草。
《Flora of China》 Vol. 22 (2006)
Cymbopogon mekongensis A. Camus
青香茅 qing xiang mao
Perennial. Culms densely tufted, wiry, 30–80 cm tall. Leaf sheaths glabrous; leaf blades linear, glaucous, 10–25 × 0.2–0.6 cm, glabrous, base narrowly rounded, apex filiform; ligule 0.7–3 mm. Spathate compound panicle narrow, 10–30 cm, spathes densely clustered; spatheoles reddish brown, 1.4–2 cm; racemes reddish brown, 0.7–1.4 cm; rachis internodes and pedicels ca. 1.5 mm, ciliate on margins; pedicel of homogamous pair linear to columnar, not or only very slightly swollen, not fused to internode. Sessile spikelet oblanceolate, 3–4.3 mm; lower glume flat, deeply grooved below middle (appearing as a line or keel on inside), keels broadly winged above middle, veinless or obscurely 2-veined between keels; upper lemma deeply 2-lobed; awn 1.1–1.5 cm. Pedicelled spikelet 3–4 mm. Fl. and fr. Jul–Sep.
Roadsides, hill slopes. Guangdong, Guangxi, Guizhou, Hainan, Hunan, Sichuan, Yunnan, Zhejiang [Laos, Thailand, Vietnam].
Cymbopogon mekongensis is very close to C. caesius (Nees ex Hooker & Arnott) Stapf, which occurs down the eastern side of Africa through Arabia to Pakistan and in S India and Sri Lanka. Cymbopogon caesius differs by the markedly swollen, barrel-shaped pedicel of the homogamous spikelet pair, which is fused to the swollen adjacent internode. It also tends to have greenish yellow rather than reddish inflorescences.