Tropidocarpum gracile |
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dobie-pod, slender tropidocarpum |
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Habit | Plants sparsely to densely hirsute basally, trichomes simple, to 1.5 mm, these mixed with fewer, forked, stalked ones, sparsely pubescent distally. |
Stems | usually ascending, prostrate, or decumbent, rarely erect, (0.4–)1–4.5(–6) dm. |
Basal leaves | petiole (0.3–)1–2.5(–3.5) cm; blade (1.5–)2.5–10(–15) cm, margins pinnatifid to pinnatisect; lobes 3–8(–12) on each side, ovate, oblong, or linear, (0.1–)0.6–2(–3) cm × (0.5–)1–3(–6) mm, shorter than terminal, margins entire, dentate, or pinnatifid. |
Cauline leaves | (proximal) petiolate or (distal and bracts) sessile; blade similar to basal, smaller and less divided distally. |
Flowers | sepals 2.5–4 × 0.7–1.5 mm, glabrous or pubescent; petals obovate to spatulate, 3–6 × 1.5–4 mm, not clawed; filaments 2.5–4 mm; anthers 0.5–0.6 mm. |
Fruiting pedicels | erect to ascending, straight, (4–)6–17(–35) mm, pubescent. |
Fruits | narrowly linear, (25–)30–60(–70) × 1.5–2(–3) mm, length 13–46 times width; valves 2, thin-leathery, smooth, usually pubescent or puberulent, rarely glabrescent, trichomes simple, retrorse; septum incomplete or absent; ovules 30–70 per ovary; style (0.3–)0.8–2.5(–4) mm. |
Seeds | dark brown, 1.2–1.6 × 0.7–1 mm. |
2n | = 16. |
Tropidocarpum gracile |
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Phenology | Flowering Mar–May. |
Habitat | Roadsides, fields, hillsides, grassy pastures, sandy washes, sage scrub, chaparral, ravines, beaches, gravel flats |
Elevation | 0-1200 m (0-3900 ft) |
Distribution |
CA; Mexico (Baja California)
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Discussion | Tropidocarpum gracile is known from central and coastal to southernmost California. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 532. |
Parent taxa | Brassicaceae > tribe Descurainieae > Tropidocarpum |
Sibling taxa | |
Synonyms | T. dubium, T. gracile var. dubium, T. gracile var. scabriusculum, T. macrocarpum, T. scabriusculum |
Name authority | Hooker: Icon. Pl. 1: plate 43. (1836) |
Web links |