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Sierra wallflower

repand wallflower, spreading wallflower

Habit Plants perennial, rarely biennial; with slender caudices. Plants annual.
Stems

0.4–6.5 dm.

(0.4)1.5–4.5(7) dm.

Basal leaves

spatulate to broadly oblanceolate, 2.5–7 cm × 3–10 mm;

margins dentate or subentire;

surfaces adaxially pubescent with 2(5)-rayed trichomes.

often withered by fruiting; middle cauline leaves linear, narrowly oblanceolate, elliptic, or oblong; (1)2–8(11) cm × (2)5–12(17) mm;

margins sinuate, dentate, or repand, petiolate.

Cauline leaves

margins upper often entire, sessile.

upper entire or denticulate, sessile.

Inflorescences

fruiting pedicels divaricate-ascending; slender, 4–12 mm; narrower than fruits.

fruiting pedicels divaricate; stout, 2–4(6) mm; width ? fruit.

Flowers

sepals linear-oblong to oblong, 8–12 mm;

lateral pair saccate;

petals 15–22 × 3.5–6 mm;

blades broadly obovate to suborbicular, yellow;

claws 8–14 mm;

petal tips rounded;

median filaments 7–14 mm;

ovules 26–44 per ovary;

styles (1.5)2–5.5 mm;

stigmas subentire to slightly 2-lobed.

sepals oblong, 4–6 mm;

lateral pair not saccate;

petals oblanceolate to spatulate, 6–8 × 1.5–2 mm, yellow;

claws 3–6 mm;

petal tips rounded;

median filaments 4–6 mm;

ovules (40)50–80(90) per ovary;

styles stout, 1–4 mm, sparsely pubescent;

stigmas slightly 2-lobed.

Fruits

latiseptate, torulose, 3.8–14 cm × 1.2–3 mm;

valves with distinct midveins, pubescent outside with 2- or 3(4)-rayed trichomes, glabrous to sparsely pubescent inside.

4-angled; somewhat torulose; (2)3–8(10) cm × 1.5–2 mm;

valves with distinct midveins, pubescent outside with 2(3)-rayed trichomes, glabrous or rarely sparsely pubescent inside.

Seeds

ovoid, 2–3.4 × 1–2 mm; wingless or rarely distally winged.

oblong, 1.1–1.5 × 0.6–0.7 mm; wingless or rarely distally winged.

Trichomes

2–5-rayed.

2(3)-rayed.

2n

=36.

=16.

Erysimum perenne

Erysimum repandum

Distribution
[WildflowerSearch map]
[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
Discussion

Knolls, rocky slopes, alpine fell-fields, gravelly grounds, talus, granitic sand. Flowering Jun–Sep. 1700–2400 m. Casc, Sisk. CA, ID, NV. Native.

Erysimum perenne was treated as a variety or invalidly pub­lished subspecies of E. capitatum by Rollins (1993) and Price (1993), respectively. It is easily separated from the latter by its torulose (vs. non-torulose) and flattened (vs. 4-angled or rarely flattened) fruit, styles (1.5)2–5.5 mm (vs. 0.2–2.5(3) mm), and yellow (vs. orange to rarely yellow) petals.

Roadsides, disturbed areas, pastures, fields, barren hillsides. Flowering Apr–Jun. 0–2600 m. BR, BW, Casc, Col, ECas, Lava, Owy, Sisk, WV. CA, ID, NV, WA; scattered throughout southern Canada and US; Africa, Asia, Europe. Exotic.

Source Flora of Oregon, volume 2, page 486
Ihsan Al-Shehbaz
Flora of Oregon, volume 2, page 486
Ihsan Al-Shehbaz
Sibling taxa
E. arenicola, E. capitatum, E. cheiranthoides, E. concinnum, E. inconspicuum, E. occidentale, E. repandum
E. arenicola, E. capitatum, E. cheiranthoides, E. concinnum, E. inconspicuum, E. occidentale, E. perenne
Synonyms Erysimum capitatum ssp. perenne, Erysimum capitatum var. perenne
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