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Marshallia mohrii
''Marshallia mohrii'', Mohr's Barbara's buttons, is a perennial herb species, endemic to the Southeastern United States, in several locations in Alabama, Georgia, and Florida.〔(USDA ) . accessed 12.1.2011〕 The first recorded discovery of the species was in 1882 by Dr. Charles Mohr, hence the botanical species name and common name.
Mohr's Barbara's buttons is currently listed as threatened on the Endangered Species List, and has been since 1988.
==Description==
''Marshallia mohrii'' grows to around 1-2.5 ft in height, with 2.5 cm wide tubular-shaped flowers found in 2-6 flower masses. The flowers can range in color from white, to pale pink or lavender. The leaves of the plant are lanceolate to ovate in shape, ranging from 6–10 cm long and 2 cm wide, with three parallel veins. The leaves are larger and more numerous near the base of the stem. (Patrick, Krakow, 1995)
The plant typically flowers from mid-May through June, with fruit being produced in July and August. (Tsao, Van Lonkhuyzen, 2000) The fruit is a 5-angled, 10-ribbed achene, about 4 mm long, with a hairy, resin-dotted surface. The fruit is topped by a crown (pappus) of five, narrowly triangular, sharply pointed scales, which are 1–3 mm long. The fruits are found among the sharply pointed bracts (chaff), which persist on the flower head. (Patrick, Krakow, 1995)
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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