Prairie Mallow is a free-flowering, easy-to-grow perennial whose hollyhock-like blooms and foliage earn it the even more popular name Miniature Hollyhock. The plants are all of the Sidalcea genus, and this one appears to be Sidalcea x 'Party Girl'. Prairie Mallows can grow to 4 feet tall, like full sun to light shade, and once they bloom in summer bear flowers until frost. A good cottage garden plant.