Biology 130


Hieracium aurantiacum; orange hawkweed [Asteraceae]  Rhizomatous, fibrous-rooted, perennial with a rosette of narrow, hairy basal leaves and a hairy, mostly leafless stem topped by bright orange dandelion-like heads -1" wide, in a compact inflorescence of several short-stalked heads.  Common on roadsides, lawns, and old fields.  Chemically inhibits the growth of other plants.  Flowers from early summer into fall.  An invasive native of Europe.  H. caespitosum is a very similar species with yellow flowers on somewhat longer stems.  [134]







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