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Oregon stonecrop

Habit Herbs, perennial, multi-stemmed from base, glabrous.
Stems

rootstocks and decumbent branches, (stout), bearing terminal rosettes.

Flowering shoots

erect, simple or branched, 8–13 cm;

leaf blades spatulate or cuneate, base short-spurred;

offsets not formed.

Leaves

alternate, spreading, sessile;

blade lustrous light green, not glaucous, spatulate or cuneate, laminar (thickest near apex), 7–12 × 4.4–9 mm, base short-spurred, not scarious, apex broadly rounded or truncate.

Inflorescences

dense corymbs, 5–10-flowered, 3-branched;

branches spreading to erect, primary branch dichotomously forked;

bracts spatulate or oblanceolate, 5–8 mm, base spurred.

Pedicels

absent or 0.4–3+ mm.

Flowers

5-merous;

sepals erect, connate basally, green, ovate-lanceolate, equal, ca. 3.5 × 2 mm, apex acuminate or acute;

petals erect or erect basally and divergent distally, connate basally, yellow, narrowly lanceolate, carinate, ca. 10.5 mm, apex aristate;

filaments yellowish or greenish;

anthers yellow;

nectar scales yellow, subquadrate to spatulate or oblong.

Carpels

erect in fruit, connate basally, light brown or yellow.

2n

= 24.

Sedum oreganum

Distribution
from FNA
AK; CA; OR; WA; BC
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

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

Key
1. Nectar scales subquadrate to spatulate, 0.4-0.5 mm; carpels 4.7-5.1 mm.
var. oreganum
1. Nectar scales oblong, 0.5 mm; carpels 3.7-4.5 mm.
var. tenue
Source FNA vol. 8, p. 221.
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. leibergii, S. lineare, S. mexicanum, S. moranii, S. nanifolium, S. nevii, S. niveum, S. nuttallii, S. oblanceolatum, S. obtusatum, S. ochroleucum, 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
Subordinate taxa
S. oreganum var. oreganum, S. oreganum var. tenue
Synonyms Gormania oregana
Name authority Nuttall: in J. Torrey and A. Gray, Fl. N. Amer. 1: 559. (1840)
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