Max E. Medley

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Silphium wasiotense, commonly called Appalachian rosinweed, is a species of flowering plant in the family Asteraceae. It is native eastern to North America, where it is endemic to the Cumberland Plateau of Kentucky and Tennessee. Its natural habitat is in dry open woodlands. It is considered rare throughout its range. Silphium wasiotense is an erect herbaceous perennial. It has large, toothed, persistent basal leaves, and similar cauline leaves which are reduced in size up the stem. Silphium wasiotense can be distinguished from the similar looking Silphium brachiatum and Silphium mohrii by

Symphyotrichum kentuckiense (formerly Aster kentuckiensis) is a rare species of flowering plant in the Asteraceae family and is commonly known as Kentucky aster, Price's aster, Miss Price's aster, Sadie's aster, or lavender oldfield aster. It is a perennial, herbaceous plant that is endemic to broken limestone cedar glades and roadsides in Alabama, Georgia, Kentucky, and Tennessee. It blooms from August through October, reaches heights between 30 centimeters (1 foot) and 100 cm (3.3 ft), and has green to reddish-brown stems. It is a nearly hairless plant with blue to blue-violet ray florets.

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Eurybia saxicastelli, commonly known as the Rockcastle aster, is an herbaceous perennial native to the south eastern United States. It is present only in the states of Kentucky and Tennessee along the Rockcastle River and the nearby Big South Fork River. As a result of its extremely restricted range as well as human alterations to its habitat, it is considered critically imperiled by NatureServe. The flowers appear in the late summer through fall and have ray florets that are pale blue to pale white and yellow disc florets that turn purplish with age.