- To 3m tall, herbaceous, green with purple or black spots, sometimes entirely purple, often glaucous, glabrous, erect, from large taproot.
- Alternate, large, to 40cm long, about as broad as long, ternate, glabrous, broadly ovate in outline. Leaflets pinnatifid. Lobes serrate.
- Multiple compound umbels terminating the stems. Umbels and umbellets subtended by attenuate bracts to 5mm long. Rays glabrous. Flowers +/-15 per umbellet.
- Petals 5, white, subequal but typically with one petal larger than the others, glabrous, to 1.2mm long, 1mm broad, cuneate at base. Apex of petal apiculate with the apiculus curving adaxially. Margins of petal folding slightly downward. Stamens 5, alternating with petals. Filaments to 1mm long, white, glabrous. Anthers pale yellow to whitish, .15mm broad. Stylopodium present, slightly flattened, greenish.
- Although this plant may smell like fennel (
) , or
in Italian, when bruised or crushed, it should not be eaten as it is
No other species in the family has such large and divided leaves as
, so the plant can be easily distinguished from a distance. It is a very common weed in Missouri.
Photographs taken at the Kansas City Zoo, 5-22-00, and in Eminence, MO., 6-6-03.
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William & Wilma Follette. USDA NRCS. 1992.
Western wetland flora: Field office guide to plant species
. West Region, Sacramento. Provided by USDA NRCS Wetland Science Institute (WSI).
This plant is listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place name to get a complete noxious weed list for that location, or click here for a composite list of all
Federal and State Noxious Weeds
This plant can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. Click on an acronym to view each weed list, or click here for a composite list of
Weeds of the U.S.
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