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Upright, somewhat hairy, annual to 20 in. Taproot. Stem usually solitary, leafy, unbranched or branched in upper portion. Yellow flowers. Leaves 3/4 - 3 1/8 in, crowded along stem, bright green, tapered at both ends, coarsely toothed in tip portion.
Heavy, or silty, clayey soils. These were in full sun and had seeded into deep gravel over plastic sheeting. Beneath is dark clay.
Spotted on Apr 18, 2012
Submitted on Apr 19, 2012