OregonFlora: Sedum acre vs. Sedum oblanceolatum

	Sedum acre	Sedum oblanceolatum
	wall-pepper	oblongleaf stonecrop
Habit		Plants perennial, glabrous; stolons 1.4–5 mm in diameter when dried.
Stems		erect, branched from base, bearing dense rosettes with hidden internodes.
Flowering shoots		10–22 cm; stem leaves ascending to somewhat spreading, alternate, narrowly oblanceolate, 15–30 × 3–10 mm, 2.2–5 × as long as wide; broadest above middle, bases not auriculate; surfaces strongly glaucous.
Leaves		rosette leaves narrowly oblanceolate, 9–55 × 5–10 mm, 2.5–8 × as long as wide, with thick layer of granular white wax.
Inflorescences		panicle-like cymes, 2.5–8.5 cm, with thick layer of granular white wax, 3–5-branched.
Flowers		calyx lobes 4–8 mm; (30)40(80)% as long as petals, with thick layer of granular white wax; tips acute; petals ascending, 9–14 mm, white, sometimes apparently yellow due to color of anthers; tips acute to attenuate; anthers yellow.
Fruits		erect, fused to slightly above base.

	Sedum acre	Sedum oblanceolatum
Distribution	[WildflowerSearch map] [BONAP county map]	[BONAP county map]
Discussion		Rock outcrops, rocky slopes. Flowering May–Jul. 400–1800 m. Sisk. CA. Native. Sedum oblanceolatum can be recognized by its narrow rosette and stem leaves. The dense, almost granular, waxy coating on the young leaves, panicle branches, and sepals imparts a waxy residue when handled. The distinctive glaucous coating wears off gradually as the season progresses. It also melts off in a plant press or microwave.
Source		Flora of Oregon, volume 2, page 603 Barbara Wilson, Richard Brainerd, Nick Otting
Sibling taxa	S. album, S. debile, S. divergens, S. lanceolatum, S. laxum, S. leibergii, S. moranii, S. oblanceolatum, S. oreganum, S. oregonense, S. radiatum, S. spathulifolium, S. stenopetalum, S. thartii	S. acre, S. album, S. debile, S. divergens, S. lanceolatum, S. laxum, S. leibergii, S. moranii, S. oreganum, S. oregonense, S. radiatum, S. spathulifolium, S. stenopetalum, S. thartii
Web links	Local floras: BC, OR, WA Local Web sites: Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: CA, OR Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Sedum oblanceolatum

wall-pepper

oblongleaf stonecrop

Habit

Plants perennial, glabrous; stolons 1.4–5 mm in diameter when dried.

Stems

erect, branched from base, bearing dense rosettes with hidden internodes.

Flowering shoots

10–22 cm;

stem leaves ascending to somewhat spreading, alternate, narrowly oblanceolate, 15–30 × 3–10 mm, 2.2–5 × as long as wide; broadest above middle, bases not auriculate;

surfaces strongly glaucous.

Leaves

rosette leaves narrowly oblanceolate, 9–55 × 5–10 mm, 2.5–8 × as long as wide, with thick layer of granular white wax.

Inflorescences

panicle-like cymes, 2.5–8.5 cm, with thick layer of granular white wax, 3–5-branched.

Flowers

calyx lobes 4–8 mm; (30)40(80)% as long as petals, with thick layer of granular white wax;

tips acute;

petals ascending, 9–14 mm, white, sometimes apparently yellow due to color of anthers;

tips acute to attenuate;

anthers yellow.

Fruits

erect, fused to slightly above base.

Sedum oblanceolatum

Distribution

[WildflowerSearch map]

[BONAP county map]

Discussion

Rock outcrops, rocky slopes. Flowering May–Jul. 400–1800 m. Sisk. CA. Native.

Sedum oblanceolatum can be recognized by its narrow rosette and stem leaves. The dense, almost granular, waxy coating on the young leaves, panicle branches, and sepals imparts a waxy residue when handled. The distinctive glaucous coating wears off gradually as the season progresses. It also melts off in a plant press or microwave.

Source

Flora of Oregon, volume 2, page 603
Barbara Wilson, Richard Brainerd, Nick Otting

Sibling taxa