EcoFlora - Heracleum mantegazzianum

Heracleum mantegazzianum Sommier & Levier
Family: Apiaceae Giant Hogweed Scott Namestnik	Gleason & Cronquist Indiana Flora Resources Vascular plants of NE US and adjacent Canada Very robust biennial or monocarpic perennial 2-5 m, stem usually purple-blotched; lvs to 3 m, ternate or ternate-pinnate, with pinnately lobed lateral segments to 13 dm; umbels to 5 dm wide, with 50-150 rays; pet ca 1 cm; fr 8-11 mm, on pedicels 1.5-4 cm; 2n=22. Native of sw. Asia, recently established as a weed in c. and w. N.Y., and to be expected to spread. Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp. ©The New York Botanical Garden. All rights reserved. Used by permission. From Flora of Indiana (1940) by Charles C. Deam ...... Indiana Coefficient of Conservatism: C = null, non-native Wetland Indicator Status: FAC Diagnostic Traits: stout perennial often to 2.5 m tall; leaves compound, lower surface of leaflets short-hispid; inflorescences with over 35 rays; longest fruiting pedicles greater than 2 cm long.
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