The dress on the right, Companion-Butterick pattern 7733, is both a floral print and a stripe. What’s more, it’s a horizontal stripe. Not just the fabric, but the high waist and the draped V top reminded me of something familiar:

My mother with her mother, 1938. The woman on the left is in her 30s; the older woman is in her 60s.
Of course, it’s not exactly the same dress, but it’s very similar. The photograph is dated 1938, and I happen to have several Butterick Fashion News flyers from 1938. Large scale prints were becoming popular in women’s dresses, under the influence of Elsa Schiaparelli. This Schiaparelli blouse, in the collection of the Metropolitan Museum, has a floral/horizontal striped print, too.
It has some elements in common with the dark fabric on the dress shown by Butterick, #7733.
Companion-Butterick pattern 7733 (right): “A soft, simple dress just right for the new striped prints. Junior Miss sizes 12 to 20; [women’s sizes] 30 to 38 [inches bust measurement.]”
Companion-Butterick pattern 7734 (left): “A tiny lace frill on a new scalloped neckline. Junior Miss sizes 12 to 20; [women’s sizes] 30 to 38 [inches bust measurement.]”
Another horizontally striped floral print is used for Companion-Butterick 7745, below. “Peasant influence, laced bodice, puffed sleeves, square neck. Sizes 12 to 20; [women’s sizes] 30 to 40 [inches bust measurement.]”
“Tyrolean” fashions were popular until World War II broke out. Lantz of Salzburg dresses — very popular with young women in the 1950s — were known for these floral stripes. (Now, those floral stripes — used lengthwise — are associated with flannel nightgowns.)
The dress on the left looks youthful, but the pattern goes to size 42″.
Companion-Butterick No. 7781 (left): “The neckline outlined with flowers is fresh. Size 36 takes 3 1/2 yards rayon crepe 39. Sizes 12 to 20; [women’s sizes] 30 to 42 [inches bust measurement.]”
Companion-Butterick No. 7791 (right): “A peasant dress in bayadere print. Junior Miss sizes 12 to 20; [women’s sizes] 30 to 38 [inches bust measurement.]” The Design Fabric Glossary defines “bayadere” as “brightly coloured stripes in a horizontal format characterized by strong effects of colour. A Bayadere is an Indian dancing girl, trained from birth.”
Although this dress does not technically have striped print fabric, the floral pattern is distributed in chevrons, rather than randomly:
Butterick 7757: “One of the new prints in a dress with softly shirred bodice. Sizes 12 to 20; [women’s sizes] 30 to 42 [inches bust measurement.]“
This dress, whose top is made of striped print fabric, appeared in Woman’s Home Companion in November of 1937:
Strong colors and stripes were certainly used by Schiaparelli in this blouse from 1936:
(It could have been worn in the 1980s — or now — but it dates to 1936.)
The woman who couldn’t afford to make a new, print dress could add a print halter top over a solid dress, as in this Butterick accessory pattern (No. 7792), which included “collars and cuffs, gilets and sashes to make a small wardrobe seem extensive:”
Taking a closer look at my mother’s dress from 1938, I can see that the pattern in the fabric is not actually floral; it is more like a negative pattern made by using lace to bleach out a solid color.
I can also see that there is a little white chemisette filling in the neckline.
Note: Pictures from the Metropolitan Museum should not be copied from a blog and posted elsewhere — The Met graciously allows their use for writing about fashion history. If you want to use them, please get them from the Met’s Online Collection site, and credit the Museum.