Glossary of plant morphology others may form a tight spiral, or whorl, around the flower stem. First, at the base, are those non-reproductive structures involved in protecting the flower when it is still a bud, the sepals, then are those parts that play a role in attracting pollinators and are typically coloured, the petals, which together with the sepals make up the perianth (perigon, perigonium). If the perianth is differentiated, the outer whorl of sepals forms the calyx, and the inner whorl of petals, the corolla. If the perianth is not differentiated into sepals and petals, they are collectively known as tepals. In some
Nemophila breviflora Nemophila breviflora Nemophila breviflora is a species of flowering plant in the borage family known by the common names basin nemophila, Great Basin nemophila, and Great Basin baby-blue-eyes. It is native to southwestern Canada and the northwestern United States, where it generally grows in wooded and forested areas in thickets and moist streambanks. It is an annual herb with a fleshy, somewhat prickly stem growing 10 to 30 centimeters tall. The alternately arranged leaves are divided into several wide, pointed lobes. Flowers are solitary, each on a short pedicel. The flower has a calyx of sepals each a few millimeters