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Lemmon's mustard, royal wild cabbage

Hall's caulanthus, Hall's wild cabbage

Habit Annuals; sparsely to densely hirsute. Annuals; sparsely to densely hispid or subglabrate.
Stems

erect, unbranched or branched distally (or, rarely, basally), 3.5–15 dm, at least sparsely hirsute basally.

erect or ascending, unbranched or branched distally, (hollow, sometimes slightly inflated), 2–12 dm.

Basal leaves

soon withered.

rosulate;

petiole 0.5–3.5 cm;

blade oblanceolate to oblong (in outline), 1.5–11.5 cm × 5–55 mm, margins pinnately lobed (lobes dentate).

Cauline leaves

petiolate (median 0.4–3 cm);

blade lanceolate to oblong, 1.5–9.5 cm × 3–30 mm (smaller distally), margins denticulate to subentire (proximal blade margins dentate).

(distalmost) sessile;

blade lanceolate-linear, margins entire, (surfaces sparsely hispid).

Racemes

without a terminal cluster of sterile flowers, (considerably elongated in fruit).

(somewhat lax), without a terminal cluster of sterile flowers.

Flowers

sepals spreading, oblong, 3.5–5.5 × 1–1.7 mm;

petals (spreading), white to lavender, 4–8 × 2–4 mm, not channeled or crisped, claw undifferentiated from blade;

filaments (spreading), subequal, 3.5–5 mm;

anthers narrowly oblong, equal, 1.5–2 mm, (coiled after dehiscence).

sepals erect, (creamy white), lanceolate to ovate, 3–6.5 × 1.8–2.5 mm (equal);

petals creamy white, 6–10.5 mm, blade 3–4 × 1.5–2 mm, not crisped, claw narrowly oblanceolate or oblong, 3–6 × 2–3 mm;

filaments in 3 unequal pairs, abaxial pair 2.5–6 mm, lateral pair 1.5–4.5, adaxial pair 4.5–8 mm;

anthers narrowly oblong, unequal, 2–3 mm (adaxial pair slightly smaller).

Fruiting pedicels

ascending to strongly reflexed (slender or thickened), 3–10 mm.

ascending, 9–25 mm, hispid or subglabrate.

Fruits

erect or reflexed, (straight), terete, 3–6.7 cm × 1.2–2 mm;

valves each with prominent midvein, (usually glabrous, rarely sparsely pubescent);

ovules 40–54 per ovary;

style (subconical or cylindrical), 1–4 mm;

stigma subentire.

divaricate to ascending (sometimes curved), terete, 6.5–12.5 cm × 1.8–2.2 mm;

valves each with prominent midvein;

ovules 78–96per ovary;

style to 2 mm;

stigma slightly 2-lobed.

Seeds

(brown), 1.4–1.8 × 1–1.3 mm.

1–1.6 × 0.7–1 mm.

2n

= 28.

Caulanthus anceps

Caulanthus hallii

Phenology Flowering Mar–May. Flowering Mar–May.
Habitat Grassy slopes, open flats, roadsides, fields, hillsides Rocky areas, chaparral, scrub
Elevation 300-1700 m (1000-5600 ft) 150-1800 m (500-5900 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[BONAP county map]
Discussion

Caulanthus anceps is distributed in Kern, Monterey, San Benito, San Luis Obispo, Santa Barbara, and Ventura counties.

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

Of conservation concern.

Caulanthus hallii is known from Riverside and San Diego counties.

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

Source FNA vol. 7, p. 679. FNA vol. 7, p. 682.
Parent taxa Brassicaceae > tribe Thelypodieae > Caulanthus Brassicaceae > tribe Thelypodieae > Caulanthus
Sibling taxa
C. amplexicaulis, C. barnebyi, C. californicus, C. cooperi, C. coulteri, C. crassicaulis, C. flavescens, C. glaucus, C. hallii, C. heterophyllus, C. inflatus, C. lasiophyllus, C. lemmonii, C. major, C. pilosus, C. simulans
C. amplexicaulis, C. anceps, C. barnebyi, C. californicus, C. cooperi, C. coulteri, C. crassicaulis, C. flavescens, C. glaucus, C. heterophyllus, C. inflatus, C. lasiophyllus, C. lemmonii, C. major, C. pilosus, C. simulans
Synonyms Thelypodium lemmonii, Streptanthus anceps Streptanthus hallii
Name authority Payson: Ann. Missouri Bot. Gard. 9: 303. (1923) Payson: Ann. Missouri Bot. Gard. 9: 290. (1923)
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