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Published In: Genera Florae Americae Boreali-Orientalis Illustrata 1: 146, pl. 60. 1848. (Gen. Amer. Bor.) Name publication detail

Project Name Data (Last Modified On 7/24/2009)

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6. Streptanthus bracteatus A. Gray, Gen. Amer. Bot. 146. 1848; Erysimum bracteatum (A. Gray) Kuntze, Revis. Gen. Pl. 2: 933. 1891, non W.W. Smith, Notes Roy. Bot. Gard. Edinburgh 8: 185. 1914. TYPE: United States, Texas, New Braunfels, May 1846, F. J. Lindheirmer 15 (holotype, GH!; isotype, MO!).

     Herbs, annual or perhaps biennial, glabrous throughout except sometimes for pedicels, glaucous. Stems (2.3–)4.5–12 dm, erect, often branched above. Basal leaves not rosulate, long petiolate, oblanceolate to spatulate, 5–25 cm, lyrately lobed to irregularly dentate; middle cauline leaves oblong to ovate, 3–15 x 1.5–8 cm, sessile, auriculate to amplexicaul, entire to shallowly dentate; upper leaves smaller, all bracts. Racemes bracteate throughout, without a terminal cluster of sterile flowers; lowermost bracts leaflike, uppermost much reduced; fruiting pedicels divaricate-ascending, 0.7–1.9 cm, glabrous or puberulent. Flowers: sepals forming campanulate calyx, nonsaccate, 8–12 mm, not keeled, ascending to suberect, inner pair apiculate; petals purplish, 14–19 mm; blade 7–12 x 5–7 mm; claw 6–8 mm, slender, much narrower than blade; stamens tetradynamous; median filament pairs free, 6–8 mm; lateral filaments 4–6 mm; anthers of all stamens fertile, 4–6 mm. Fruits 8–14.5 cm x 2.5–4 mm, divaricate-ascending, flattened, straight, not torulose; valves glabrous, with a prominent midvein; gynophore 1–2 mm; replum straight; style 1–3.5 mm; stigma 2-lobed; ovules and seeds 48–80 per fruit. Seeds oblong, 3–4 x 2–3 mm, flattened; wing continuous, 0.5–0.7 mm wide at apex.

Flowering: Apr–Jun.

Habitat: openings in oak-juniper woodlands, shallow, well-drained, gravelly clay-loam areas derived from limestone, dry rock hills, bluffs.

Distributions: United States (Texas).




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