白云百蕊草
| 白云百蕊草 |
 |
|
中文名:白云百蕊草 拉丁学名:Thesium psilotoides Hance 界:植物界 门:被子植物门 纲:双子叶植物纲 亚 纲:原始花被亚纲 目:管花目 科:檀香科 属:百蕊草属 |
白云百蕊草(bái yún bǎi ruǐ cǎo)，学名：Thesium psilotoides Hance，是檀香科百蕊草属植物，产于广东广州市至阳江县一带。柬埔寨、泰国、菲律宾、印度尼西亚也有分布，生于海拔200-1300米开旷松林下的草地上。 [1]
目录
白云百蕊草形态特征
矮小草本，高15-25厘米；根茎短，木质。茎直立，纤细，中部分枝，枝开叉。叶小，鳞片状，长1-1.5毫米，具单脉，沿茎部下延而成纵棱。
花单生或2-3朵聚生，长1.5毫米，顶生；苞片1枚，小苞片4枚，同形，均比花被短并环绕花被基部；花被长约1毫米，略带污黄色，5裂至中部；
裂片三角形，在芽中呈镊合状排列，边缘内折；雄蕊5，着生于花冠裂片下部1/3处，花药2室，内向，花丝短；子房1室；
花柱直立，稍比雄蕊短，柱头扁圆形。坚果卵圆形，长和宽均约2毫米，向基部渐狭，表面有纵棱和不明显的网脉；宿存花被短，拱、贴，稍呈脐状突起。花期5月，果期8月。
Herbs dwarf; rhizomes short, woody. Stems erect, branched at middle (branches rebranched), slender, 15-25 cm. Leaves sessile, scale-like, 1-1.5 mm, decurrent along stems to form ridges, 1-veined. Inflorescences cymose, fasciculate, 1-3-flowered; bracts scale-like, ca. 1.5 mm; bracteoles 4, scale-like, shorter than perianth, bracts and bracteoles forming an involucre around base of perianth.
Perianth 5-merous, slightly dirty yellow, broadly campanulate, ca. 1.5 mm, tube divided to middle, ca. 1 mm, lobes triangular, margin inflexed. Stamens 5, on basal 1/3 of lobes; filaments short. Ovary sessile.
Style erect, slightly shorter than stamens; stigma ± globose. Nutlet ovoid, ca. 2 × 2 mm, with ridges and inconspicuous reticulate veins, gradually narrowed to base; persistent perianth arched, adnate, slightly umbulate, short. Fl. May, fr. Aug.
Open grasslands under Pinus forests; 200-1300 m. Guangdong, [Cambodia, Indonesia, Philippines, Thailand].
分类文献
Thesium psilotoides Hance in Journ. Bot. 6: 48. 1868; Forb. et Hemsl. in Journ. Linn. Soc. Bot 26: 409. 1894; Lecomte Fl Gen. Indo-chine 5:214. 1915; 广州植物志413. 1956.
白云百蕊草生长环境
生长于海拔200-1300米开旷松林下的草地上。