Chrysanthemum Planter, Fenton
Fenton referred to this piece simply as a hexagonal bowl. Carnival collectors call it Chrysanthemum planter. In purple or black amethyst, these sell for between $25 and $40 on eBay.

In 2018, a purple example sold at auction for $25.

In 2020, an example in purple, though not listed by this name, sold for $35

Updated 9/26/2020