蝴蝶杂草

Butterfly weed (Asclepias tuberosa) is a species of milkweed native to eastern North America.蝴蝶杂草（Asclepias tuberosa）是北美洲东部原生的一种乳草。 It is a perennial plant growing to 0.6-2 m (1 -2 feet) tall, with clustered orange or yellow flowers from early summer to early fall.这是一种多年生植物，生长到5-12 m（2-3英尺）高，从初夏到初秋簇生橙色或黄色花朵。 The leaves are spirally arranged, lanceolate, XNUMX-XNUMX cm long and XNUMX-XNUMX cm broad.叶子螺旋排列，披针形，长XNUMX-XNUMX厘米，宽XNUMX-XNUMX厘米。
This plant favors dry, sand or gravel soil, but has also been reported on stream margins.这种植物偏爱干燥，沙子或砾石的土壤，但据报道在河床边缘。 It requires full sun.它需要充足的阳光。
The common name comes from the butterflies that are attracted to the plant by its color and its copious production of nectar.蝴蝶的俗名是由蝴蝶的颜色和丰富的花蜜吸引而来的。 Butterfly weed is also the larval food plant of the Queen and Monarch butterflies.蝴蝶杂草也是女王和帝王蝶的幼虫食用植物。 The butterfly weed grows to be 1-3 feet long.蝴蝶杂草长到XNUMX-XNUMX英尺长。
Extracts in herbalism and by Native Americans were used as an expectorant for wet coughs and other pulmonary ailments.中草药提取物和美洲原住民提取物被用作祛痰药，用于治疗咳嗽和其他肺部疾病。 Use of the herb is contraindicated in pregnancy, during lactation or with infants due to the small amount of cardiac glycosides.由于强心苷的含量少，在怀孕，哺乳期或婴儿中禁忌使用这种草药。