马利筋属

马利筋屬（学名：Asclepias）下的植物通稱乳草，是多年生草本植物的一属，属于夹竹桃科植物，涵括超过140种植物。例子有马利筋。

马利筋物种已经演化出精巧的抵御策略以对抗吃它们叶子的毛虫。这些包括叶子上的毛、其组织中称为心脏干扰素的心脏毒以及来自於植物管状器官的乳白色有毒乳汁，故马利筋又称乳草。

下属物种
本属包括以下物种：

 杂交种：

 部分種 

120px Asclepias albicans Whitestem milkweed, native to the Mojave and Sonoran deserts120px Asclepias amplexicaulis Blunt-leaved milkweed, native to central and eastern United States120px Asclepias asperula Antelope horns, native to American southwest and northern Mexico120px Asclepias californica California milkweed, native to central and southern California120px Asclepias cordifolia Heart-leaf milkweed, native to the Sierra Nevada and Cascade Range up to 2000 m.120px Asclepias cryptoceras Pallid milkweed, native to the western United States.120px 马利筋 Asclepias curassavica Scarlet milkweed, tropical milkweed, bloodflower, bastard ipecacuanha, native to the American tropics, introduced to other continents120px Asclepias curtissii Curtiss's milkweed, endemic to sandy areas of Florida120px Asclepias eriocarpa Woollypod milkweed, native to California, Baja California, and Nevada120px Asclepias erosa Desert milkweed, native to California, Arizona, and Baja California120px Asclepias exaltata Poke milkweed, native to eastern North America120px Asclepias fascicularis Narrow-leaf milkweed, native to Western United States120px| Asclepias hirtella Tall green milkweed120px Asclepias humistrata Sandhill milkweed, native to southeastern United States120px 沼澤乳草 Asclepias incarnata Swamp milkweed, native to wetlands of North AmericaAsclepias involucrata 120px Asclepias lanceolata Lanceolate milkweed (Cedar Hill milkweed), native to coastal plain of eastern United States from Texas to New Jersey120px Asclepias linaria Pine needle milkweed, native to Mojave and Sonoran desertsAsclepias linearis Slim milkweed120px Asclepias meadii Mead's milkweed, native to midwestern United StatesAsclepias nivea 120px Asclepias nyctaginifolia Mojave milkweed, native to the American southwestAsclepias obovata Pineland milkweed120px Asclepias purpurascens Purple milkweed, native to eastern, southern, and midwestern United States120px Asclepias quadrifolia Four-leaved milkweed, native to eastern United States and Canada120px Asclepias rubra Red milkweed120px Asclepias solanoana Serpentine milkweed, native to northern California120px Asclepias speciosa Showy milkweed, native to western United States and Canada120px Asclepias subulata Rush milkweed, leafless milkweed, native to southwestern North America120px Asclepias subverticillata Horsetail milkweedAsclepias subverticillata (A. Gray) Vail , USDA PLANTS120px Asclepias sullivantii Sullivant's milkweed120px Asclepias syriaca Common milkweed120px Asclepias texana Texas milkweed120px 柳葉馬利筋 Asclepias tuberosa Butterfly weed, pleurisy root120px Asclepias uncialis Wheel milkweed120px Asclepias variegata White milkweed120px Asclepias verticillata Whorled milkweedAsclepias vestita Woolly milkweed120px Asclepias viridiflora Green milkweed120px Asclepias viridis Green antelopehorn, spider milkweed120px Asclepias welshii Welsh's milkweed

南美洲有A. curassavica等12種。

 参考文献 
 Only Perception：马利筋 vs. 毛虫：以迅速修复反击胃口  
 Creative Commons 搜寻 
 萝摩科

R
R
Category:伊利诺伊州的象征