wild parsnip, more...
[Pastinaca sativa var. pratensis Pers., more]
Plant: Biennial, 0.5-2 m, taprooted, nearly glabrous to puberulent; stem erect, branched, conspicuously angled, grooved Leaves: petiole 1-1.5 cm; blade 1.5-3 dm, oblong to ovate, 1-pinnate, leaflets 5-11, 5-10 cm, oblong to ovate, coarsely serrate and lobed or divided INFLORESCENCE: umbels compound; bracts generally 0; bractlets generally 0; rays 5-20, pedicels many, rays and pedicels spreading-ascending; peduncle 7-15 cm Flowers: many, small; calyx lobes minute; petals wide, free, yellow or orange, tips narrowed; stamens 5; pistil 1, ovary inferior, 2-chambered, generally with a ± conic, persistent projection or platform on top subtending 2 free styles Fruit: 2 dry, 1-seeded halves that separate from each other but generally remain attached for some time to a central axis, 4-6 mm wide, oblong to round, very compressed front-to-back; ribs unequal, marginal narrowly winged, others thread-like; oil tubes per rib-interval 1, all equal in length; fruit axis divided to base; Seed: face flat Misc: Roadsides, etc; < 1000 m.
Taprooted biennial to 1.5 m; lfls 5-15, oblong to ovate, 5-10 cm, serrate or lobed, or, in robust pls the larger ones even divided into 2-several lfls; rays 15-25; umbel 1-2 dm wide; fr 5-7 mm; 2n=22. Native of Eurasia, long cult. and thoroughly established as a weed in waste places, fields, and along roadsides throughout most of N. Amer. The common cult. parsnip and similar wild plants with smaller roots are considered conspecific, and some of the wild plants may actually be recent escapes.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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