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Leavenworthia stylosa A. Gray
Family: Brassicaceae
Leavenworthia stylosa image
Stems (when present) 1-2.5 dm. Basal leaves: petiole 1-2.5 cm; blade (2-)3-7.5(-10) cm, lobes 1-5 on each side, margins entire or shallowly dentate, terminal lobe orbicular to broadly ovate, 0.5-1.2(-1.8) cm × 5-11(-17) mm, considerably larger than lateral lobes, margins entire or shallowly dentate. Fruiting pedicels: solitary flowers 30-100 mm; racemes 15-70 mm. Flowers: sepals widely spreading, oblong-linear, (3.3-)3.7-5.8 × 1-1.6 mm; petals spreading, usually yellow, sometimes white or lavender, broadly spatulate to obovate, 9-13(-15) × 3.5-6(-9) mm, claw yellow to orange, 2-3.5 mm, apex deeply emarginate, apical notch 0.5-1.3 mm deep; filaments: median 4-6.3 mm, lateral 1.7-2.6 mm; anthers 0.9-1.5 mm. Fruits oblong to linear, (1-) 1.5-3.4 cm × (2.5-)3-4(-4.5) mm, smooth, subterete; valves thick; ovules (6-)8-12 per ovary; style (3-)3.5-7 mm. Seeds 2.5-3.4 mm diam.; wing 0.2-0.3 mm wide; embryo nearly straight to slightly accumbent. 2n = 30. Flowering Mar-Apr. Pastures, roadsides, thin soil on limestone beds, limestone glades, streamsides, seeps, old fields; 150-300 m; Tenn. Leavenworthia stylosa is known only from Bedford, Davidson, Rutherford, Smith, and Wilson counties.