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''Eustoma'', a genus of three species in the family Gentianaceae, grows natively in warm regions of the Southern United States, Mexico, Caribbean and northern South America. Examples grow mostly in grassland and in areas of disturbed ground. These flowers are commonly known as Lisianthus flowers. 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 three 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. Lisianthus flowers are either single-flowered or double-flowered. Both types of flowers can be found in all ranges of the possible colors listed above.〔Web Page View live Web page Archive & annotate page "Lisianthus." Cornelll University Department of Horticulture. Conrell University, 2003. Web. 11 Dec. 2012. They are usually one to three feet tall, although there are dwarf varieties that only grow up to eight inches in height.〔"Eustoma Grandiflorum." Missouri Botanical Garden. Missouri Botanical Garden, n.d. Web. 11 Dec. 2012. eustoma-grandiflorum.aspx>.〕 Lisianthus flowers are tricky to grow and require some maintenance.〔"Lisianthus." Better Homes and Gardens. Better Homes and Gardens, n.d. Web. 11 Dec. 2012. University, 2003. Web. 11 Dec. 2012. Dec. 2012. 〕 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.〔"Lisianthus." Better Homes and Gardens. Better Homes and Gardens, n.d. Web. 11 Dec. 2012. ''Eustoma russellianum'' is particularly popular and has a number of cultivars that are grown for the cut-flower market. The cultivated flower is also often known as Lisianthus, Texas bluebell, prairie gentian,〔 (ITIS Standard Report Page: Eustoma )〕 tulip gentian, or just gentian, although the last name can cause confusion with the related ''Gentiana'' plant genus. ''Eustoma'' is named after the Greek words eu, which means good, and stoma, which means mouth. ''Lisianthus'' on the other hand comes from the Greek words lissos, meaning smooth, and anthos, which means flower. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Eustoma」の詳細全文を読む スポンサード リンク
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