栏目

坚被灯心草Juncus tenuis Will

坚被灯心草Juncus tenuis Will

科名:灯心草科 Juncaceae

属名:灯心草属 Juncus

《中国植物志》第13(3)卷168页
  10.坚被灯心草(植物分类学报)图版37:9-12
  Juncus tenuis Willd. , Sp. Pl. 2 (1) : 214. 1799: Buchen. in Engl. , Pflanzenr. 25 (IV. 36) : 115. 1906; V. Krecz. et Gontsch. in Kom. Fl. URSS 3: 533. 1935; Satake in Nov. Fl. Jap. Juncac. 52. 1938; Ohwi, Fl. Jap. 275. 1965; 台湾植物志5: 152. 1978; S. Snogerup in Tutin, Fl. Europ. 5: 106. 1980. ——J. leptocladus Hayata Icon. Pl. Form. 6: 100. 1916. ——J. macer S. F. Gray, Nat. Arr. Brit. Pl. 2: 164. 1821.
  多年生草本,高10-40厘米;根状茎短,具褐色须根。茎丛生,直立,较细,圆柱形或稍扁,直径0.6-1.2毫米,浓绿色。叶基生;叶片细长线形,长4-23厘米,顶端锐尖,边缘向内卷;叶鞘边缘膜质;叶耳白膜质,长2-4毫米,钝圆。圆锥花序顶生,长3-7厘米,有6-40朵花;花在分枝上顶生及侧生;叶状总苞片2枚,长4-18厘米,花下小苞片2枚,卵形,黄白色,顶端渐尖,长约2毫米,宽约1.5毫米;花具梗;花被片披针形,长3.5-4毫米,宽约1毫米,内、外轮几等长或外轮者稍长,淡绿色,质地较坚硬,顶端锐尖,边缘膜质,中央增厚隆起,在背部(隆起部分)两侧与膜质边缘之间有2条黄色纵带;雄蕊6枚;花药长圆形;黄色,长约0.8毫米;花丝长约1.2毫米;雌蕊有1短花柱;柱头3分叉,长1.6毫米,红褐色。蒴果三棱状卵形,黄绿色,与花被片近等长,顶端具短尖头,有3个不完全隔膜。种子长0.4-0.5毫米,红褐色,基部有白色短附属物。染色体数2n=30,32。花期6-7月,果期8-9月。
  产黑龙江、山东、浙江、江西、台湾、河南。生于海拔350米的河旁、溪边、湿草地。日本、格鲁吉亚、欧洲也有分布。

《Flora of China》 Vol. 24 (2000)
Juncus tenuis  Willdenow
坚被灯心草   jian bei deng xin cao
Juncus leptocladus Hayata; J. macer Gray.
Plants perennial, tufted. Stems 10--40 cm ( 0.6--1.2 mm, rigid to weak. Leaves basal; leaf sheath auricles obtuse, 2--4 mm, margin scarious to broadly so; leaf blade flat, 4--23 cm ( 0.5--1.8 mm, margin often involute. Inflorescences terminal panicles, 3--7 cm, usually lax, 6--40-flowered, rarely flowers in a few clusters; involucral bracts 2, leaflike, 4--18 cm. Bracteoles 2. Perianth segments greenish, lanceolate, 3.5--4 ( ca. 1 mm, subequal or outer ones somewhat longer than inner, margin white scarious, apex long tapered to a sharp point. Stamens 6; filaments ca. 1.2 mm; anthers ca. 0.8 mm. Style shorter than ovary; stigmas ca. 1.6 mm. Capsule trigonous ovoid, shorter than to rarely equaling perianth, apex truncate and shortly mucronate to obtuse. Seeds reddish brown, 0.4--0.5 mm, appendaged; appendage white, short. Fl. Jun--Jul, fr. Aug--Sep. 2 n = 30, 32, 84.
Riversides, streamsides, wet grasslands; ca. 400 m. Heilongjiang, Henan, Jiangxi, Shandong, Taiwan, Zhejiang [India, Japan, Korea; Europe, North America].

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