Eustoma, commonly known as lisianthus or prairie gentian, is a small genus in the gentian family. They are native to warm regions of the southern United States, Mexico, Caribbean and northern South America. This genus is typically found in grasslands and in areas of disturbed ground.
They are herbaceous annuals, growing to 15–60 cm tall, with bluish green, slightly succulent leaves and large funnel-shaped flowers growing on long straight stems: sometimes erect single stems, other times growing on branching stems that can rise to be eighteen feet tall. The flowers can grow up to two inches across and can be found in a variety of colors. They have been found in all shades of pink, purple, white, and blue. In addition, some are bicolored and some are occasionally found in yellow or carmine-red.
Eustoma flowers are either single-flowered or double-flowered. Both types of flowers can be found in all ranges of the possible colors listed above. They are usually one to three feet tall, although there are dwarf varieties that only grow up to eight inches in height.
The genus name Eustoma is a compound of the Greek prefix ευ- ( eu- ) 'good / pleasing' and Greek στόμα ( stoma ), 'mouth' - hence '( having a ) pleasing mouth', while the obsolete Lisianthus is a compound of λισσος ( lissos ) 'smooth', and ανθος ( anthos ) 'flower'.
ustoma flowers are tricky to grow and require some maintenance. They have tiny seeds that must be sown on the surface, not buried, and they must be planted in rich, well-drained soil and exposed to full sun. They must be kept moist but not overwatered: overwatering may result in the growth and development of fungal diseases. Lisianthus flowers will begin to bloom in early summer and some will continue to bloom throughout the later months of the summer. When cut, Lisianthus flowers can last anywhere from two to three weeks in a vase. Eustoma russellianum is particularly popular and has a number of cultivars that are grown for the cut-flower market.
Eustoma russellianum, is a species of flowering plant in the gentian family. Its previous binomial name was Eustoma grandiflorum. Common names include Texas bluebells, Texas bluebell, bluebell, showy prairie gentian, prairie gentian, and Lisianthus.
Eustoma russellianum has blue-green waxy leaves and showy bell shaped flowers in blue pink or white each borne singly on an upright plant. Depending on where it grows it may present as an annual, biennial or perennial plant.
It is found primarily in the Great Plains region of North America, from Nebraska southeast to Wyoming, and south to Texas and Mexico. Due to its popularity and the frequency it's picked, it has been unable to naturally reseed itself in its native distribution. It prefers moist, sandy soils and often grows near streams or creek-beds.
Texas bluebell is a popular garden flower, and has been cultivated in Japan for over 70 years. Many varieties, including those with double petals, or a variety of colored flowers, have been developed.


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