Southern Wetland Flora
Field Office Guide to Plant Species
Ptilimnium nuttallii (DC.) Britton
- Family: Carrot (Apiaceae)
- Flowering: June-August
- Field Marks: This bishop-weed differs by its leaflets that are not whorled and by its toothless bracts.
- Habitat: Swampy meadows, wet woodlands, wet prairies, bogs, wet ditches, abandoned rice fields.
- Habit: Annual herb with fibrous roots.
- Stems: Upright, branched, smooth, up to 3 feet tall.
- Leaves: Alternate, pinnately divided; leaf segments thread-like, alternate or opposite, smooth, up to 3 inches long.
- Flowers: Several, in compound umbels up to 4 inches across; umbels subtended by toothless, thread-like bracts; flower stalks about 1/3 inch long.
- Sepals: Minute, green, united.
- Petals: 5, white, free from each other.
- Stamens: 5, with purple anthers.
- Pistils: Ovary inferior.
- Fruits: Nearly spherical to ovoid, smooth, about 1/20 inch in diameter, with conspicuous lateral ribs.
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