- Glabrous, few-leaved, glaucous, terete, to +/-1.5m tall, from a mass of tuberous roots.
Stem and base of cauline leaf.
- Mostly basal, with aristate serrations on margins, glabrous, glaucous, to 100cm long, +/-6cm broad, linear, with parallel venation.
- Terminal bracteate cymes. The bracts subtending each cyme division lanceolate and foliate, reduced upwards. Peduncles glabrous and glaucous. Flowers in capitate globose clusters terminating each peduncle. Clusters bracteate, to +/-2cm in diameter. Individual florets sessile, subtended by one chaffy bract. Chaff glabrous, acute, partially enclosing the floret, to 1cm long, glabrous. Receptacle subglobose.
- Florets to +/-6mm long. Petals 5, white, glabrous, irregular, to 3mm long. Styles 2, exserted, greenish-white, glabrous, to 5mm long, with a green nectariferous ring at base. Ovary inferior, covered with small scarious scales, 2-locular, 2-seeded(one seed per locule). Stamens 5, distinct, folded back on themselves at first and then erect and exserted. Filaments glabrous, greenish white, to 3-4mm long. Anthers greenish, to 1.3mm long. Sepals 5, erect, stiff, to +3mm long, +2mm broad, ovate, aristate, green with whitish margins, glabrous but minutely denticulate on midrib abaxially.
- June - September.
- Prairies, open woods, glades, also cultivated.
- Native to U.S.
- The plant, at first glance, appears as an
. The flowers really give away the fact that it belongs with the carrots. The stems of the plant also have a carrot fragrance when crushed.
This species is widely cultivated.
Photographs taken at Bethel Prairie, Barton County, MO., 7-4-03, and at the Sunklands Conservation Area, Shannon County, MO., 7-26-04.