North Dakota designated the wild prairie rose (Rosa blanda or Rosa arkansana) as the official state flower in 1907.
The flower has been identified as Rosa Pratincola in species. The flower sports five bright pink petals with a tight cluster of yellow stamens in the center. The Wild Prairie Rose grows along roadsides, in pastures, and in native meadows. The name Prairie Rose is also sometimes applied to Rosa blanda, also known as the Meadow Rose or Smooth Rose, which is also widely spread, but somewhat further to the north
Rosa arkansana (Prairie Rose or Wild Prairie Rose is a species of rose native to a large area of central North America, between the Appalachian and Rocky Mountains from Alberta, Manitoba, and Saskatchewan south to New Mexico, Texas and Indiana. There are two varieties:
The name (Rosa arkansana) comes from the Arkansas River in Colorado. The species' wide distribution and consequent genetic drift has led to an extensive synonymy.
Wild roses are found throughout North Dakota and bloom from June through late summer. The flower, in varying shades of pink, is set off by many yellow stamens in the center. Prairie Wild Rose is rhizomatous; it spreads aggressively and therefore may not be suitable for small landscape plantings.
The wild prairie rose was approved by the tenth session of the Legislative Assembly of North Dakota on March 7, 1907. According to Shankle:
North Dakota, by an act of her legislature approved on March 7, 1907, adopted as her State floral emblem, the wild prairie rose [Rosa blanda or Rosa arkansana]. "Contributing something to the choice was the fact that the State University of North Dakota had selected the colors, pink and green, chosen directly from the wild prairie rose growing on the campus."
The law designating the wild prairie rose, rosa blanda or arkansana as the official North Dakota state floral emblem is found in the North Dakota Century Code, Title 54, Chapter 54-02, Section 54-02-03.
Title 54. State Government.
CHAPTER 54-02. STATE EMBLEMS, SYMBOLS, AND AWARDS.
SECTION
54-02-03. State flower. The floral emblem of the state of North Dakota shall be the wild prairie rose, rosa blanda or arkansana.
Taxonomic Hierarchy: Wild Prairie Rose
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Rosidae
Order: Rosales
Family: Rosaceae - Rose family
Genus: Rosa L. - rose
Species: Rosa arkansana Porter - prairie rose
Species: Rosa blanda Aiton - smooth rose