1列当的基本形态食葵列当是一年上全寄生的草本植物。茎直立,单生、肉质、黄褐色至褐色,无叶绿素;没有真正的根,靠根须状的假根侵入向日葵根组织内寄生。株高一般20cm。最高54cm。茎有纵横,叶退化为鳞片状,螺旋状排列在茎上。两性花,呈密集的穗状花序排列,没株有花50至70朵,最多207朵。花蓝紫色,长10cm到20cm,花冠合瓣,二唇形,上唇二裂,下唇三裂。一般都会寄生 A list of the basic form of eating Kwai Kwai column when the full parasitic herbs. Stem erect, solitary, fleshy, tan to brown, chlorophyll-free; no true root, rooted by rhizoid-like root invade sunflower root tissue parasites. Plant height is generally 20cm. Up to 54cm. Stems have aspect, leaf degeneration scales, spiral arrangement in the stem. Bisexual flowers, dense spikes arranged, no strain of flowers 50 to 70, up to 207. Flowers blue-purple, 10cm to 20cm long, corolla flap, two lip, upper lip two split, lower lip three split. Usually parasitic