Centaurium calycosum
Encyclopedia
Centaurium calycosum is a species of flowering plant in the gentian family
Gentianaceae
Gentianaceae are a family of flowering plants of 87 genera and over 1500 species. Flowers are actinomorphic and bisexual with fused sepals and petals. The stamens are attached to the inside of the petals and alternate with the corolla lobes. There is a glandular disk at the base of the gynoecium,...

 known by the common name Arizona centaury. It is native to northern Mexico and the southwestern United States, where it grows in moist places in otherwise dry habitat, such as riverbanks. This is an erect biennial herb growing up to half a meter tall. The widely lance-shaped leaves appear in a basal rosette and along the slender stem, each up to 7 centimeters long. The inflorescence
Inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Strictly, it is the part of the shoot of seed plants where flowers are formed and which is accordingly modified...

 is an open array of flowers on short pedicels
Pedicel (botany)
A pedicel is a stem that attaches single flowers to the main stem of the inflorescence. It is the branches or stalks that hold each flower in an inflorescence that contains more than one flower....

. Each flower opens into five pointed lobes, each about a centimeter long and dark rose pink in color.

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