| Author | (Michaux) Nuttall | |
| Distribution | Throughout the Mountains and Piedmont; sparingly in the southern half of tht Coastal Plain.
This is an Eastern species, ranging from NY and southern MN, south to northern FL and eastern TX. | |
| Abundance | Generally common in the Mountains and Piedmont; rare in the southern and central Coastal Plain, but likely absent from the Sandhills proper, and absent from the eastern counties. | |
| Habitat | This is a species of moist to rich forests, usually under a deciduous forest canopy. It grows in cove forests, mesic forests, and into bottomlands. | |
| Phenology | Blooms in April and May, and fruits from July to September. | |
| Identification | This is one of five serrate-leaved yellow-flowered umbels of rich forests (Thaspium and Zizia species) that are easily confused, even by biologists. This species is a fairly large one, growing to 2-2.5 feet tall, branched above, with large alternate leaves. The leaves are usually twice pinnate, the leaflets being lanceolate to ovate in shape, about 2 inches long and about 3/4-inch wide, very coarsely and irregularly serrated. The leaflet margins are green and leafy and do not have a hyaline (thin and clear) margin. There are usually 3-6 umbels per stem, on stalks about 2-3 inches tall. There are 5-10 rays (and umbellets) that are spreading and about 1-inch long. This species should be separated from the other four in this group by having its basal leaves also 2-3-pinnate, like the stem leaves, very strongly serrated leaves, and lack of a hyaline margin on the leaflets. (Normally, a leaflet with a hyaline margin feels thick or coriaceous as opposed to thin, leafy, and easily torn as is found in T. barbinode.) | |
| Taxonomic Comments | None
| |
| Other Common Name(s) | None. The predominant common name is quite long and awkward, but there is no better name in use. The Thaspium species as a group are named as "meadow-parsnip". | |
| State Rank | S5 | |
| Global Rank | G5 | |
| State Status | | |
| US Status | | |
| USACE-agcp | UPL link |
| USACE-emp | FACU link |
