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圆头藜

中文学名:圆头藜

拉丁学名:Chenopodium

strictum Roth

界:植物界

门:被子植物门

纲:木兰纲

目:石竹目

科:藜科

属:藜属

圆头藜,是藜属一年生草本,产于河北山西陕西甘肃新疆南部。 [1]

圆头藜形态特征

高20-50厘米。茎直立或外倾,通常细瘦,具条棱及绿色色条。叶柄细瘦。花两性,花簇于枝上部排列成狭的有间断的穗状圆锥状花序;花被裂片5。胞果顶基遍,果皮与种子贴生。种子扁卵形,黑色或黑红色,表面略有浅沟纹。花果期7-9月。

叶片卵状矩圆形至矩圆形,通常长1.5-3厘米,宽8-18毫米,先端圆形或近圆形,有时有短突尖,基部宽楔形,上面近无粉,下面有密粉而带灰白色,边缘在基部以上具锯齿,齿向先端逐渐变小以至消失;叶柄细瘦,长为叶片长度的1/2-1/3。

花两性,花簇于枝上部排列成狭的有间断的穗状圆锥状花序;花被裂片5,倒卵形,背面有微隆脊,边缘膜质;柱头2,丝状,外弯。胞果顶基遍,果皮与种子贴生。

种子扁卵形,宽约1毫米,黑色或黑红色,有光泽,表面略有浅沟纹,边缘具锐棱。

Herbs annual, 20-50 cm tall. Stem erect, basal branches ascending, upper branches usually erect; stem and branches green and red striate, often becoming deep beet red at maturity, ribbed. Leaf blade abaxially whitish gray to dark green, ovate-oblong to oblong, usually 1.5-3(-6) × 0.8-2.5 cm, 2-3 × as long as petiole, abaxially moderately to densely farinose, adaxially slightly or moderately farinose, base broadly cuneate, margin above base subentire to serrate or dentate, apex rounded, sometimes shortly mucronate; teeth gradually becoming smaller distally on margin. Glomerules arranged into narrow, interrupted, spikelike or moniliform panicles on upper part of branches. Flowers bisexual. Perianth segments 5, obovate, abaxially slightly keeled, margin membranous. Stigmas 2, filiform, recurved. Utricle depressed; pericarp adnate to seed. Seed black or black-red, sublustrous, depressed ovoid, ca. 1 mm in diam., slightly lineate, rim margin acutely ribbed. Fl. and fr. Jul-Sep.

圆头藜生长环境

生长于山谷、河岸、道旁等处。

圆头藜分布范围

产于河北山西陕西甘肃新疆南部。分布于美洲欧洲伊朗苏联的东南部。 (资料来源:中国植物志第25(2)卷 )

参考来源

  1. 圆头藜, 植物智, 2020-01-18