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Orobanche ramosa
''Orobanche ramosa'' is a species of broomrape known by the common names hemp broomrape and branched broomrape. It is native to Eurasia and North Africa, but it is known in many other places as an introduced species and sometimes a noxious weed. 〔 Joel, D. M. (2009). The new nomenclature of Orobanche and Phelipanche. Weed Research, 49, 6–7. doi:10.1111/j.1365-3180.2009.00748.x. 〕
It is a pest in agricultural fields, infesting crops including tobacco,〔Karkanis, A., et al. (2007). Tobacco (''Nicotiana tabaccum'') infection by branched broomrape (''Phelipanche ramosa'') as influenced by irrigation system and fertilization, under East Mediterranean conditions. ''Journal of Agronomy'' 6:3 397-402.〕 potato,〔Haidar, M. A. et al. (2005). Selective control of ''Orobanche ramosa'' in potato with rimsulfuron and sub-lethal doses of glyphosate. ''Crop Protection'' 24:8 743-47.〕 and tomato.〔Mauromicale, G. et al. (2008). Effect of branched broomrape (''Orobanche ramosa'') infection on the growth and photosynthesis of tomato. ''Weed Science'' 56:4 574-81.〕
The plant produces many slender, erect stems from a thick root. The yellowish stems grow 10 to 60 centimeters tall and are coated in glandular hairs. The broomrape is parasitic on other plants, draining nutrients from their roots, and it lacks leaves and chlorophyll. The inflorescence bears several flowers, each in a yellowish calyx of sepals and with a tubular white and blue to purple corolla.
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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