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矮灯心草Juncus minimus Buchen.

矮灯心草Juncus minimus Buchen.

别名:矮灯芯草;

科名:灯心草科 Juncaceae

属名:灯心草属 Juncus

《中国植物志》第13(3)卷216页
  62.矮灯心草(中国高等植物图鉴)图版51:5-7
  Juncus minimus Buchen. in Bot. Zeit. 25: 145. 1867 et in Bot. Jahrb. 6: 209. 1885; Hook. f., Fl. Brit. Ind. 6: 400. 1894; Buchen. in Engl., Pflanzenr. 25 (N. 36): 232, fig. 109. 1906; 中国高等植物图鉴5: 413. 图7656. 1976; 西藏植物志5: 517. 1987.
  多年生草本,高3-7厘米;根状茎短,具多数黄褐色须根。茎丛生,直立,圆柱形,有纵槽,直径0.6-0.9毫米。叶通常基生(偶有1枚茎生叶);叶片扁平,宽线形至狭披针形,长1.5-6厘米,宽1-3毫米,顶端稍钝,黄绿色;叶鞘开放或有时闭合,鞘口两侧稍呈波状皱褶,无叶耳。头状花序单一顶生,有(2-)3-6朵花,直径0.7-1.4厘米;苞片3-4枚,卵状披针形至披针形,长3-7毫米,宽1.7-2.5毫米,顶端尖,最下面的1片叶状,常长于花序,长1-2厘米;花具短梗;花被片披针形,长约4-4.5毫米,宽1.1-1.6毫米,顶端尖,褐黄色至栗黄色,内外轮等长或内轮者稍长;雄蕊6枚;花药长圆形,长约0.7毫米,淡黄色;花丝长约3.5毫米;花柱短;柱头3分叉,线形,长约1.5毫米。蒴果三棱状长圆形,长5-6毫米,栗褐色,顶端有短尖头,具不完全3隔膜。种子长圆形,周围具白色附属物,连同尾状物共长1.1-1.5毫米。花期6-7月,果期7-8月。
  产四川、西藏。生于海拔4 360米的河岸沙地边。尼泊尔、不丹、锡金也有分布。模式标本采自锡金。

《Flora of China》 Vol. 24 (2000)
Juncus minimus  Buchenau
矮灯心草   ai deng xin cao
Plants perennial, tufted, 3--7 cm tall. Rhizome short. Stems terete, striate. Cataphylls 1 or 2, pale brown. Leaves basal, occasionally 1 cauline; leaf sheath open or sometimes closed, auricles absent; leaf blade broadly linear to narrowly lanceolate, flat, 1.5--6 cm × 1--3 mm, apex obtuse. Inflorescences terminal; head solitary, 0.7--1.4 cm in diam., (2 or)3--6-flowered; basal bract leaflike, 0.5--2 cm, often longer than head. Perianth segments brownish yellow to chestnut yellow, chestnut in fruit, lanceolate, 4--4.5 × 1.1--1.6 mm, equal or inner ones slightly longer than outer, apex acute. Stamens 6; filaments 2.5--3.5 mm; anthers 0.5--0.7 mm. Style 0.5--1.5 mm; stigmas 1.5--2 mm. Capsule chestnut brown, trigonous oblong to ellipsoid, 5--6 mm, imperfectly 3-septate, apex mucronate. Seeds oblong, 0.5 mm; appendages white, 1.1--1.5 mm including tails. Fl. Jun--Jul, fr. Jul--Aug.
Moist sand on river banks, wet gravel; 4000--4700 m. Sichuan, Xizang, Yunnan [Bhutan, Nepal, Sikkim].

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