Hieracium piloselloides, Tall Hawkweed Non-native, Piedmont only Leaves glaucous, less than an inch wide.
Hieracium lachenalii, European Hawkweed Non-native, Piedmont only Leaves not glaucous, up to 2" wide.
Leafy stems
Hieracium paniculatum, Panicled Hawkweed Native, Piedmont only Small, long-stalked flowers in a loose panicle.
Hieracium scabrum, Rough Hawkweed Native, Piedmont & coastal plain Top of stout stem is densely hairy; basal leaves gone at flowering time.
Hieracium gronovii, Hairy Hawkweed Native, Piedmont & coastal plain Basal leaves and leaves on the lower part of the stem both present at flowering time.
Sources: The Flora of Delaware, Manual of Vascular Plants, Herbaceous Plants of Maryland.
Delaware Wildflowers
Hieracium caespitosum, Meadow Hawkweed 
Hieracium paniculatum, Panicled Hawkweed 
Hieracium scabrum, Rough Hawkweed 
Hieracium gronovii, Hairy Hawkweed 
