Bluebonnets as bright a blue as the sky over Texas. American. Oil paintings. Impressionist. Julian Onderdonk, artist (1882-1922).

"Bluebonnets in Texas." No date.
“Bluebonnets in Texas.” No date. In the public domain in the United States because the artist has been dead over 70 years. via https://julianonderdonk.wordpress.com/about/
“Bluebonnet Scene with Girl." 1920.
“Bluebonnet Scene with Girl.” 1920. Oil on canvas. Image © Ogden Museum of Southern Art, New Orleans. Fair use license. via https://ogdenmuseum.org/summermembershipdrive/robert-julian-onderdonk-bluebonnet-scene-with-girl-1920-oil-on-canvas-roger-h-ogden-collection/
"Bluebonnet Landscape with Cacti, Road and Mountain Laurel." No date.
“Bluebonnet Landscape with Cacti, Road and Mountain Laurel.” No date. In the public domain. via https://www.wikiart.org/en/robert-julian-onderdonk/bluebonnet-landscape-with-catci-road-and-mountain-laurel
"Late Afternoon Bluebonnets-San Antonio, Texas-Fort Sam Houston in Distance." 1914.
“Late Afternoon Bluebonnets-San Antonio, Texas-Fort Sam Houston in Distance.” 1914. Image © 2000-2019 askART. Fair use license. via http://www.askart.com/Artist_Art_For_Sale_Inquiry.aspx?adno=82773&artist=4994