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荆条,马鞭草科牡荆属落叶灌木或小乔木,高可达5m,小枝四棱。叶对生、具长柄,掌状复叶,小叶边缘有缺刻状锯齿,浅裂以至深裂。圆锥花序,长12~20cm;花萼钟状,具5齿裂,宿存;花冠蓝紫色,二唇形;雄蕊和花柱稍外伸。核果,球形或倒卵形。花期长6~7月,果期9~10月。荆条在中国广为分布,常见于东北、华北、西北、华中、西南等省区山地阳坡上,形成灌丛,资源极丰富。荆条是阳性、喜光树种,耐干旱,耐瘠薄,适应性非常强,是华北干旱瘠薄山地的主要灌木。主根发达,侧须根少,能在石缝中生长。荆条对土壤要求不严,在
Vitex, verbenaceae Vitex deciduous shrubs or small trees, up to 5m, sprig four edges. Leaves opposite, with long stems, palmately compound leaflets, leaflets margin lacked serrated, lobed or deeply divided. Panicle, length 12 ~ 20cm; calyx bell-shaped, with 5 teeth split, persistent; corolla blue-purple, two lip; stamens and styles slightly outstretched. Drupe, globose or obovate. Flowering long 6 to 7 months, fruit 9 to October. Vitex is widely distributed in China, common in the northeast, north, northwest, central China, southwest and other mountainous areas on the mountain slope, the formation of shrubs, a very rich natural resources. Vitex is positive, hi light tree species, drought resistance, infertility, adaptability is very strong, is the main shrub in arid barren mountainous areas in North China. The main root developed, less lateral roots, can grow in the stone. Vitex negligible requirements of the soil, in