Hieracium caespitosum is a perennial herb, colonial from rhizomes and short, thick stolons, sap milky, stems 25-90 cm tall, long-hairy, wooly and blackish-glandular hairy above.
Leaves mostly in a basal rosette, 5-25 cm long, including stalk, 1-3.5 cm wide, long-hairy both sides, flowering stem with 0-2 small leaves.
Flowers bright yellow, all rays, bracteate base 0.6-0.8 cm tall, blackish-hairy; inflorescence compact, branched, of 5-30 flower heads; blooms and fruits May-Sept.
Fruit dry, 1-seeded achenes to 0.2 cm long, white plumed, wind dispersed.
Wetland status: UPL.
Frequency in NYC: Infrequent.
Habitat: Open areas, roadsides, lawns, fields.