16. Streptanthus fenestratus (Greene) J. T. Howell, Leafl. W. Bot. 9: 184. 1961; Pleiocardia fenestrata Greene, Leafl. Bot. Observ. Crit. 1: 86. 1904. TYPE: United States, California, Fresno Co., Tehipite Valley, 4000 ft., 6–10 July 1900, H. M. Hall & H. P. Chandler 492 (holotype, US!; isotypes, CAS!, MO!).
Herbs, annual, glabrous throughout, glaucous. Stems (0.5–)1–2(–3.5) dm, erect, simple or branched below middle. Basal leaves rosulate, petiolate, 1.5–6 cm, with slender petioles, 1- or 2-pinnatisect; middle cauline leaves ovate to lanceolate, coarsely dentate or entire, rarely pinnatifid but not divided into filiform segments, auriculate; upper leaves amplexicaul, entire. Racemes bracteate below or between lowermost 1 or 2 flowers, without a terminal cluster of sterile flowers; fruiting pedicels divaricate-ascending, straight, 2–7 mm. Flowers: sepals forming tubular-urceolate calyx, purple, 5–7 mm, slightly keeled or not, recurved at apex; petals rose-purple, 9–15 mm; blade 3–6 x 2.5–3.5 mm, not crisped; claw 6–9 mm, narrower than blade; filaments in 3 pairs of unequal length, free; adaxial pair 5–7 mm, recurved; abaxial pair 3–4 mm; lateral pair 1.5–2.5 mm; anthers of all stamens fertile, 2–2.5 mm. Fruits 2–5 cm x 1.2–1.7 mm, ascending to divaricate or rarely reflexed, slightly flattened, not only slightly torulose; valves glabrous, with obscure midvein; gynophore 0.2–2.5 mm; replum straight; style 0.1–1 mm; stigma entire; ovules and seeds 22–38 per fruit. Seeds oblong, 1–1.5 x 0.7–0.9 mm; wing absent or distal and 0.05–0.1 mm wide. 2n = 28.
Habitat: granitic ledges and sand, gruss deposits in open pine forest.
Elevation: 1100–1800 m.
Distribution: United States (California/Fresno Co.).