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Liatris compacta
''Liatris compacta'', sometimes called Arkansas gayfeather, is a herbaceous plant species in the sunflower family and genus ''Liatris''. It is native to Ozarks of west-central Arkansas and eastern Oklahoma in the central United States,〔(Biota of North America Program 2014 county distribution map )〕 where it is found growing in habitats such as rocky ridges, bluffs, hillsides, weathered sandstone, and open woods. It blooms in June to September and may start blooming as early as May, it has purple flowers grouped into heads. It was known as a variety of ''Liatris squarrosa'' as ''Liatris squarrosa var. compacta'' until relatively recently.
==Description==
''Liatris compacta'' grows from rounded corms, that produce hairless stems 22 to 50 centimeters (8.8-20.0 inches) tall. The flowers are in heads with 18-25 flowers per head, the heads are produced singularly or in clusters of 2 to 5 heads. The heads have large leaf-like bracts under them; the stems attaching the heads to the main stem are 3 to 25 millimeters (0.12-1.00 inch) long. The heads are arranged in loose spike-like or raceme-like collections. The basal and early cauline leaves have 3 to 5 nerves and are elliptic-lanceolate in shape; the basal foliage often withers before flowering. The foliage is hairless and may have faint glandular dots; the leaves are gradually reduced in size as they ascend near the tops of the stems. The seed are produced in cypselae fruits that are 5.5 to 8 millimeters long with feathery bristles.〔(Flora of North America, ''Liatris compacta'' )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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