TOMPKINS COUNTY FLORA
Ambrosia trifidaL.
Mitchell NYNYFA TCUSDA NY
accepted no accepted
Great Ragweed

Asteraceae

CAYUGA FLORA (1926) NOTES: Rich alluvial soils about streams and marshes ; locally common. July 15-Aug. In the Cayuga Lake Basin, confined to the Cayuga Lake marshes and the inlet region. Que. to Man., southw. to Fla., Nebr., Colo., and N. Mex. ; occurring sparingly along the coast.


BH SPECIMENS FOR Ambrosia trifida (this list may be incomplete)
 Ithaca, Seedlings, , anonymous (BH 20942);
 Ithaca, 1 Aug 1876, anonymous (BH 20947);
 Ithaca, 5 Aug 1882, anonymous (BH 20939);
 Ithaca, Fall Creek, Oct 1874, anonymous (BH 20941);
 Ithaca, swamp, weed, 14 Oct 1917, Bailey (BH 20938);
 Ithaca, 15 Aug 1918, Bailey (BH 20935);
 Ithaca, 15 Aug 1918, Bailey (BH 20937);
 Ithaca, inlet flats, 19 Aug 1929, Bailey (BH 20934);
 Ithaca, Flats, 19 Aug 1929, Bailey (BH 20936);
 Ithaca, Flats, southwest corner of Cayuga Lake, height 1-2 m, 2 Aug 1942, Clausen & Clausen 5883 (BH 20946);
 Ithaca, giant ragweed, annual, Summer 1932, Curtis 1306 (BH 67638);
 Town of Dryden, 107 Neimi Road, Five Wells Nature Preserve, north of Log House in clearing, 26 Aug 1995, Dilger WCD1211 (BH 112583);
 Ithaca Flats, rich soil, 17 Aug 1875, Dudley (BH 20945);
 Ithaca, Lighthouse Road, city dump, 29 Sep 1925, Eames 16316 (BH 20943);
 Ithaca, Lighthouse Road, city dump, 29 Sep 1925, Eames 16316 (BH 67049);
 Ithaca, west of Lehigh Valley Railroad yards, waste ground, 4 Jul 1932, Muenscher X18158 (BH 67048);
 Ithaca, between Fall Creek, East Hill, and Cayuga lake, open alluvial and marshy flats, rich, low roadside, 14 Aug 1913, Palmer 1282 (BH 20944);
 Ithaca, Cornell University, near athletic grounds, 9 Aug 1893, Wiegand (BH 20948);
 Ithaca, along Fall Creek at head of Cayuga Lake, bottom land woods, 10 Aug 1915, Eames & Thomas 5264 (BH 20940);

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