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Sierra wallflower

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

0.4–6.5 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.

Cauline leaves

margins upper often entire, sessile.

Inflorescences

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

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.

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.

Seeds

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

Trichomes

2–5-rayed.

2n

=36.

Erysimum perenne

Erysimum franciscanum

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.

Source 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, E. repandum
Synonyms Erysimum capitatum ssp. perenne, Erysimum capitatum var. perenne
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