This section is from the book "Harper's Guide To Wild Flowers", by Caroline A. Creevey. Also available from Amazon: Harper's Guide To Wild Flowers.
Family, Pink. Calyx, bell - shaped, swollen, 5-pointed, often brownish or reddish, sticky. Petals, fringed, on claws. Stamens, 10. Styles, 3. Pod, 1 -celled. Leaves, in whorls of fours, smaller toward the top, pointed, somewhat toothed. Flowers, conspicuous, large, 1 inch across, in a terminal panicle. Stem, swollen at the joints and viscid, from which property the English name catchfly is derived. Height, 2 to 3 feet. June and July.
A showy plant, sure to catch the eye of the stroller on hillsides, and well worth our attention. Hills and rocky banks. (See illustration, p. 67.)
Starry Campion (Silene stellata)
 
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