Dianthus caryophyllus (Caryophyllaceae).-Producesvery few capsules which contain any good seeds.

Viscaria oculata (Caryophyllaceae).-Producesplenty of capsules with good seeds.

Stellaria media (Caryophyllaceae).-Covered-upand uncovered plants produced an equal number of capsules, and the seeds in both appeared equally numerous and good.