Trifolium hybridum is a perennial herb, 30-80 cm tall, stems ascending, soft, hollow. Stipules narrowly egg-shaped, tips free.
Leaves alternate, 3-parted, leaflets oval to elliptic, tips rounded or notched, to 6 cm long, 3.5 cm wide, leaf stalks longer than leaves.
Flowers white and pink bilaterally symmetrical, pea-flower-shaped, to 1 cm long, calyx lobes less than twice as long as the tube, fragrant, turning brown, on individual stalks mostly 0.2 cm long or longer; flower heads dense, numerous, rounded, to 3.5 cm wide on stalks to 8 cm long; blooms May-Oct..
Fruit a dry pod with 2-4 seeds.
Wetland status: FACU-.
Frequency in NYC: Occasional but widely distributed.
Habitat: Open areas. A lawn plant.
Notes: Very similar to both T. repens (which is smaller with all white flowers and colonial from runners) and T. pratense (which has redder flowers without individual stalks in the flower head).