Fig. 410: Polygonum lapathifoUiwi: a, habit, showing the stout stem, swollen above 

 the nodes, and the drooping spikelike racemes, x %; b, perianth, spread open, showing 

 glandular disk and the stamen insertion, x 8; c, perianth enclosing mature achene (note 

 the forked recurved veins which have become prominent), x 8; d, tip of spike, the 

 sheathing bracts obliquely tapered, their margins glandular, x 6; e, mature achene, x 

 8; f, young stipular sheaths, showing glandular or ciliate margins and fractured sheath 

 enclosing the swollen part above the node, x 1%. (From Mason, Fig. 205). 



