1) Caryophylloid dicot genus 2) Genus spergula 
Spergula is a genus of plants of the knot grass family, natural order Caryophyllaceae. They are natives of temperate regions. One species, Spergula arvensis, the corn spurrey, grows in Britain. It has stalks between fifteen and thirty centimeters long, swollen at the joints, and bears panicles of white flowers. It is frequently grown as a sheep fod...
[n] - small genus of Old World annual herbs: corn spurry
genus Spergula noun small genus of Old World annual herbs: corn spurry