Some authors recognize two species in Neslia, while others recognize only N. paniculata with two subspecies somewhat separated geographically, though intermediates are common in areas of overlap (P. W. Ball 1961). The sole difference between them is whether the fruit apex is truncate (subsp. paniculata) or apiculate [subsp. thracica (Velenovský) Bornmüller or N. apiculata Fischer, C. A. Meyer & Avé-Lallemant].
Sep oblong, obtuse; pet yellow, spatulate, gradually tapering into the claw; each short stamen flanked by a pair of fleshy, U-shaped glands, the arms with short lateral processes; ovules 2 per locule; fr firm, thick-walled, indehiscent, very slightly compressed, reticulate and pitted; branching annuals with minute fls and clasping sessile lvs. 2, Mediterranean and Near East.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.