Helianthus tuberosus L.
Annotated by G. Seiler, 1989.

British Columbia: University of British Columbia, Horticultural Greenhouse. Elev. 90 m
49.261537° N, 123.251818° W,
Cultivated in greenhouse; 1 gallon pots, standard potting soil, 16 hr lights, immersion watering. Grown by D. Bock; USDA GRIN PI547243; seed collection details: collected by G. Seiler, B. Dozet, V. Gavrilova, J. Pomeroy 1989 Sept 22, United States, Indiana, Rush County, Highway 3S, 6.7 km south of Rushville (39.56666667, -85.45000000), roadside ditch, on edge of corn field, in clay soil; seeds collected from 40 plants, small isolated population; plants just past peak flowering, 1-3 seeds per head; plant had large lower leaves, up to 6 in wide; stem glabrous; spray damage to some plants, severe rust on most plants, powdery mildew present.

Eric Baack pi547243, 2014 Dec 09
UBC, Accession: V250560