I did a post on this pattern here:
This week's post is on variations of the classic.
One can rotate it around a central pivot point
in classic German folk art style.
A graceful example from the Pilgrim Roy Collection
It's BlockBase #766
Although it has appliqued stems it's mostly pieced.
Grandmother's Dream - Carlie Sexton
Double Tulip - Woman's Home Companion
Lily Flower or Tulip - Good Housekeeping
This sampler from Luzerne County, Pennsylvania is the earliest
date-inscribed example I've found. Two rotations of the design
frame the center inscription dated 1846.
This one doesn't rotate---it's a two way mirror image.
I didn't find any published patterns or names for this less symmetrical variation.
Although it's relatively common in 19th-century quilts
Alice Washburn in the collection of
the Heritage Park Museum in Calgary, Canada
Nancy Stroud Cheek in the Arkansas Territorial Restoration Museum
Sampler in Jane Lury's Collection
A variation with four diamonds rather than six.
A set of unnamed blocks.