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大果百蕊草 |
中文名:大果百蕊草 别 名:珠峰百蕊草(西藏植物志) 二名法:Thesium jarmilae Hendry 界:植物界 门:被子植物门 Angiospermae 纲:双子叶植物纲 Dicotyledoneae 亚 纲:原始花被亚纲 Archichlamydeae 目:檀香目 Santalales 亚 目:檀香亚目 Santalineae 科:檀香科 Santalaceae 族:百蕊草族 Trib. Thesieae 属:百蕊草属 Thesium 组:百蕊草组 Sect. Thesium |
大果百蕊草(dà guǒ bǎi ruǐ cǎo),学名 Thesium jarmilae Hendry. ,又名珠峰百蕊草,生长于海拔约3700米河谷向阳草坡、林缘或山谷草甸中。主要分布于中国西藏。模式标本采自西藏(珠穆朗玛峰北坡)。 [1]
大果百蕊草形态特征
多年生草本;根茎粗短;茎平卧,长15-20厘米,不分枝或少分枝,颇粗。叶通常长圆形至长圆状线形,长2厘米,宽1.5-2毫米,具单脉,顶端锐尖。
总状花序具多少稀疏的花;花梗长约0.5-1.5厘米,斜升或横展;苞片长圆状线形,长1.5-2.5厘米,着生于花梗的中下部;小苞片2枚,形状似苞片,长仅5-8毫米;
花单生,阔钟形,长4-5(-6)毫米,5数;裂片三角形,长为花被的1/3,顶端内弯;雄蕊和花柱内藏;子房柄长约2毫米。
坚果近球形,直径5-6毫米,有明显的纵脉(棱);宿存花被略与果等长。花期6月。
Herbs perennial; rhizomes short and thick. Stems procumbent, unbranched or sparsely branched, rather thick, 15-20 cm. Leaves often oblong to oblong-linear, ca. 20 × 1.5-2 mm, 1-veined, apex acute. Inflorescences racemelike, few flowered, with 1 flower per axil; bracts inserted on middle and basal part of pedicels, oblong-linear, 15-25 mm; pedicel ascending or patent, 5-15 mm; bracteoles 2, similar to bracts in shape, 5-8 mm.
Perianth 5-merous, broadly campanulate, 4-5(-6) mm, lobes triangular, to 1/3 as long as perianth, apex incurved. Stamens and style not exserted. Ovary stalk ca. 2 mm. Nutlet subglobose, 5-6 mm in diam., with conspicuous longitudinal veins (ridges); persistent perianth nearly as long as or slightly longer than fruit. Fl. Jun.
- Sunny slopes, marshlands in valleys; ca. 3700 m. Xizang.
分类文献
Thesium jarmilae Hendry. in Acta Hort. Bot. Prag. 110. 1962.
大果百蕊草生长环境
主要生长于海拔约3700米河谷向阳草坡、林缘或山谷草甸中。