Common Name: CARROT FAMILY
Habit: Annual to perennial herb [shrub, tree], generally from taproot. Stem: generally +- scapose, generally ribbed, hollow. Leaf: basal and generally cauline, generally alternate; stipules generally 0; petiole base generally sheathing stem; blade generally much dissected, occasionally compound. Inflorescence: umbel or head, simple or compound, generally peduncled; bracts present in involucres or 0; bractlets generally present in "involucels". Flower: many, small, generally bisexual (or some staminate), generally radial (or outer bilateral); calyx 0 or lobes 5, small; petals 5, free, generally ovate or spoon-shaped, generally incurved at tips, generally +- ephemeral; stamens 5; pistil 1, ovary inferior, 2-chambered, generally with a +- conic, persistent projection or platform at tip subtending 2 free styles. Fruit: 2 dry, 1-seeded halves (= mericarps), separating from each other but generally +- persistent to central axis; ribs on halves 5, 2 marginal, 3 to back; oil tubes 1--several per interval between ribs.
Genera In Family: 300 genera, 3000 species: +- worldwide, especially temperate; many cultivated for food or spice (e.g., Carum, caraway; Daucus; Petroselinum); Bupleurum lancifolium Hornem. is historical garden weed; some toxic (e.g., Conium). Note: Mature fruit generally critical in identification, shape given in outline. Hydrocotyle moved to Araliaceae, Orogenia moved to Lomatium, Sphenosciadium moved to Angelica. Petroselinum crispum (Mill.) A.W. Hill is a waif.
eFlora Treatment Author: Lincoln Constance & Margriet Wetherwax, except as noted
Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.

Common Name: YAMPAH
Habit: Perennial herb, glabrous, generally glaucous; roots tuberous, single or clustered, or clustered-fibrous. Stem: erect, branched. Leaf: blade lanceolate to triangular-ovate, generally 1--2-ternate-pinnate or 1--2-pinnately or ternate-pinnately dissected, leaflets or segments generally linear to lance-linear. Inflorescence: umbels compound; bracts 0--many, conspicuous and reflexed or not; bractlets several to many, narrow, +- scarious; rays, pedicels few to many, generally spreading-ascending; 2° umbels generally convex distally. Flower: calyx lobes evident; petals generally obovate, white, tips narrowed. Fruit: linear-oblong, +- compressed side-to-side or not at all, glabrous; ribs +- equal, thread-like to prominent, not winged; oil tubes 1--several per rib-interval; fruit axis divided to base. Seed: face flat to grooved.
Etymology: (Greek: around the neck, from involucre) Note: Roots, basal leaves needed for identification.
eFlora Treatment Author: Lincoln Constance & Margriet Wetherwax
Reference: Chuang & Constance 1969 Univ Calif Publ Bot 55:1--74

Habit: Plant 1.5--9 dm; roots tuberous, 2--3-clustered or 1, 1--7 cm. Leaf: basal petiole 2--15 cm; basal blade 10--20 cm, +- ovate, generally 1--2-ternate-pinnately dissected, segments 0.5--6 cm, thread-like to oblong, generally lobed, toothed; cauline leaves ternate-pinnately dissected or 1-ternate. Inflorescence: peduncle 2--20 cm; bracts 8--12, 3--12 mm, +- lanceolate, generally acuminate; bractlets 4--10, 3--9 mm, like bracts; rays 9--23, 1--2 cm, +- equal, ascending or spreading-ascending; pedicels 2--5 mm; 2° umbels 18--30-flowered. Flower: petals 1-veined; styles 2 mm. Fruit: 4--6 mm, +- oblong; ribs thread-like; oil tubes 2--3 per rib-interval.
Note: Subspecies distinct.