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San Diego jewelflower, San Diego wild cabbage, slender pod jewelflower

Habit Annuals; hispid basally, glabrous or subglabrate distally.
Stems

erect, usually branched distally, 2.5–12 dm, hispid.

Basal leaves

weakly rosulate;

petiole 0.3–3 cm;

blade linear-oblanceolate to linear-oblong, 0.7–7 cm × 2–18 mm, margins coarsely dentate or pinnately lobed.

Cauline leaves

(median) sessile;

blade linear-lanceolate, 5–16 cm × 5–40 mm, (smaller distally, base amplexicaul to sagittate), margins dentate or (distalmost) entire.

Racemes

(densely flowered), without a terminal cluster of sterile flowers.

Flowers

sepals erect (purple or yellow to creamy white), lanceolate, 3–8 × 1–1.8 mm (equal);

petals purple or yellowish (often with darker purple veins), 5–15 mm, blade 2–6 × 1–1.5 mm, not crisped, claw narrowly oblanceolate or oblong, 3–9 × 1–1.5 mm;

filaments tetradynamous, median pairs 3–6 mm, lateral pair 2–5 mm;

anthers oblong, equal, 1–3 mm.

Fruiting pedicels

reflexed, 2–8 mm, glabrous or hispid.

Fruits

reflexed (often straight, rarely curved), latiseptate or 4-angled, 4.5–10 cm × 1–1.5 mm;

valves each with prominent midvein;

ovules 56–82 per ovary;

style 0.5–3.5mm;

stigma slightly 2-lobed.

Seeds

1.2–2 × 0.9–1.4 mm.

2n

= 28.

Caulanthus heterophyllus

Phenology Flowering Mar–May.
Habitat Coastal scrub, chaparral, rocky areas
Elevation 0-1400 m (0-4600 ft)
Distribution
from FNA
CA; Mexico (Baja California)
[WildflowerSearch map]
[BONAP county map]
Discussion

Caulanthus heterophyllus is a common species distributed from Santa Barbara County southward into northwestern Baja California, Mexico.

R. E. Buck (1993) divided the species into two varieties, including one invalidly published, based on flower color, but these are treated here as mere color variants.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 7, p. 682.
Parent taxa Brassicaceae > tribe Thelypodieae > Caulanthus
Sibling taxa
C. amplexicaulis, C. anceps, C. barnebyi, C. californicus, C. cooperi, C. coulteri, C. crassicaulis, C. flavescens, C. glaucus, C. hallii, C. inflatus, C. lasiophyllus, C. lemmonii, C. major, C. pilosus, C. simulans
Synonyms Streptanthus heterophyllus, C. stenocarpus, Guillenia heterophylla, Streptanthus repandus
Name authority (Nuttall) Payson: Ann. Missouri Bot. Gard. 9: 298. (1923)
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