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Leiberg stonecrop, Leiberg's stonecrop

Habit Herbs, biennial, erect, glabrous.
Stems

rootstocks, horizontal, simple, bearing basal rosettes (axillary shoots with subterranean, white stems that detach easily and bear terminal rosettes of colorless leaves).

Flowering shoots

erect, simple, (5–)11(–18) cm;

leaf blades ovate or elliptic, base not spurred;

offsets not formed.

Leaves

alternate, spreading, outermost ones petiolate (petiole 4–5 mm);

blade green or greenish white, not glaucous, oblanceolate, obovate, or narrowly spatulate, laminar, 2–16 × 1.4–3.2 mm, base not spurred, not scarious, apex blunt, (surfaces papillose).

Inflorescences

cymes, 5–60-flowered, 3–6-branched;

branches often strongly recurved, each 1 or 2 times dichotomously forked;

bracts similar to leaves, smaller.

Pedicels

to 0.3 mm.

Flowers

(5–)6(–7)-merous;

sepals erect, slightly connate basally, green, ovate, equal, 1.5–2 × 0.7–1.1 mm, apex acute;

petals spreading, distinct nearly to base, canary yellow, keel green or dark red, lanceolate to oblong, carinate, 4–6 mm, apex subobtuse to acute;

filaments yellow;

anthers yellow;

nectar scales deep yellow, subquadrate.

Carpels

stellately spreading in fruit, connate basally, brown.

2n

= 16.

Sedum leibergii

Phenology Flowering spring–summer.
Habitat Open or largely bare areas, basalt or limestone, rocky hillsides, cliffs
Elevation 50-1200 m (200-3900 ft)
Distribution
from FNA
ID; OR; WA
[WildflowerSearch map]
[BONAP county map]
Discussion

Variation in the number of floral parts of Sedum leibergii (5–7-merous) is unique in North American sedums. It has tiny rosettes of lax, long-spatulate basal leaves that mostly have shriveled by anthesis. Sedum borschii, which is often confused with S. leibergii, has primary rosettes, prominent at anthesis, that have obovate or elliptic leaves.

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

Source FNA vol. 8, p. 209.
Parent taxa Crassulaceae > Sedum
Sibling taxa
S. acre, S. albomarginatum, S. album, S. annuum, S. borschii, S. cockerellii, S. debile, S. divergens, S. glaucophyllum, S. havardii, S. hispanicum, S. lanceolatum, S. laxum, S. lineare, S. mexicanum, S. moranii, S. nanifolium, S. nevii, S. niveum, S. nuttallii, S. oblanceolatum, S. obtusatum, S. ochroleucum, S. oreganum, S. oregonense, S. praealtum, S. pulchellum, S. pusillum, S. radiatum, S. robertsianum, S. rupestre, S. rupicola, S. sarmentosum, S. sexangulare, S. spathulifolium, S. stelliforme, S. stenopetalum, S. ternatum, S. villosum, S. wrightii
Synonyms S. divaricatum, Amerosedum leibergii
Name authority Britton: in N. L. Britton et al., N. Amer. Fl. 22: 73. (1905)
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