......4 Midstem leaves with (6-) 7-16 nodes along the rachis, the primary leaf segments whorled or verticillate at the major nodes; individual leaf segments shorter than the rachis (or rarely as long as in P. texense); involucral bract segments (1-) 3 (-7); stem thickened and rounded at base, forming a globose or slightly elongate corm; styles (0.3-) 0.5-2.0 mm long; fruits 2.2-4.0 mm long; dorsal ribs of the fruit narrow, sharp-edged to blunt; flowering Jul-Oct; fruiting mid Jul-Nov.