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Leiberg's stonecrop

Cascade stonecrop, Pacific stonecrop, spreading stonecrop

Habit Plants biennial, glabrous. Plants perennial, somewhat tufted, glabrous.
Stems

horizontal; simple.

decumbent, becoming erect or ascending, branched; without rosettes.

Flowering shoots

erect; simple; (5)11–18 cm;

stem leaves alternate, not producing leafy bulbils in axils; ovate or elliptic; widest below middle, bases not spurred.

erect, rarely branched, 6–10 cm;

stem leaves suborbicular to obovate or oblong, dried stems 1.5–2 mm thick.

Leaves

rosette leaves deciduous, spreading, narrowly oblanceolate, 2–16 × 1.4–3.2 mm, green or greenish white, bases not spurred;

tips blunt;

surfaces papillose, not glaucous.

opposite, rarely alternate, 2-ranked, suborbicular to obovate or oblong, subterete; ± globular, 4–9 × 4–6 mm, green or red, bases slightly clasping;

tips rounded;

surfaces not glaucous; shiny.

Inflorescences

cymes with 5–60 flowers, 3–6-branched;

branches often strongly recurved; each 1–3 times dichotomously forked;

bracts like stem leaves but smaller.

cymes with 5–25 flowers, 2–3-branched;

branches recurved to erect;

bracts similar to other leaves or elliptic to broadly lanceolate, 2–5 mm.

Flowers

(5)6(7)-parted;

sepals ovate, 1.5–2 × 0.7–1.1 mm, green;

tips acute;

petals spreading, separate nearly to base, lanceolate to oblong, 4–6 mm, yellow;

keel green or dark red;

tips subobtuse to acute;

filaments yellow;

anthers yellow;

ovaries glandular-pustulose.

5(7)-parted;

sepals ovate, 2–3 × 1.5–2 mm, green;

tips obtuse;

petals erect basally, widely spreading from about middle, usually distinct; narrow; ~5 mm, yellow;

tips acute or obtuse and with an apiculus;

filaments yellow;

anthers yellow.

Fruits

widely spreading when mature, fused near base, glandular-pustulose.

widely spreading, fused at base, red or reddish brown to straw-colored.

2n

=16.

=16.

Sedum leibergii

Sedum divergens

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

Cliffs, rocky slopes, on basalt or limestone. Flowering Apr–Jul. 50–1800 m. BW, Col, ECas, Lava, Owy. ID, WA. Native.

Sedum leibergii is a small, yellow-flowered Sedum like S. lanceolatum, S. radiatum, or S. stenopetalum. Unlike those species, S. leibergii has distinctly glandular-pustulose follicles. Additionally, S. leibergii does not produce offsets in the axils of stem leaves like S. stenopetalum.

Rocky slopes, talus, lava. Flowering Jun–Aug. 1200–2300 m. Casc, Sisk. CA, WA; north to AK, northeast to Alberta. Native.

Within this species, each pair of leaves is at a right angle to the pair below it, forming two columns of almost round, green to red leaves. This leaf arrangement is unique among our native Sedum. Sedum debile has opposite leaves, but they are glaucous and often whitish, and they form ball-like rosettes. The two species do not overlap in range. Sedum divergens may recall particularly thick-leaved individuals of S. oreganum, but the latter species does not have such neat columns of leaves, and its petals are much longer and nearly erect.

Source Flora of Oregon, volume 2, page 603
Barbara Wilson, Richard Brainerd, Nick Otting
Flora of Oregon, volume 2, page 602
Barbara Wilson, Richard Brainerd, Nick Otting
Sibling taxa
S. acre, S. album, S. debile, S. divergens, S. lanceolatum, S. laxum, S. moranii, S. oblanceolatum, S. oreganum, S. oregonense, S. radiatum, S. spathulifolium, S. stenopetalum, S. thartii
S. acre, S. album, S. debile, S. lanceolatum, S. laxum, S. leibergii, S. moranii, S. oblanceolatum, S. oreganum, S. oregonense, S. radiatum, S. spathulifolium, S. stenopetalum, S. thartii
Synonyms Sedum borschii
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