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Oregon stonecrop

orpin d'espagne, Spanish stonecrop

Habit Herbs, perennial, multi-stemmed from base, glabrous. Herbs, annual, tufted, glabrous or scattered glandular-hairy.
Stems

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

erect or ascending, simple or much-branched, (glandular-hairy), not bearing rosettes.

Flowering shoots

erect, simple or branched, 8–13 cm;

leaf blades spatulate or cuneate, base short-spurred;

offsets not formed.

spreading or erect, simple, 5–15 cm, (glabrous or with scattered glandular hairs);

leaf blades linear to oblong, base not 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.

alternate, ascending, sessile;

blade green, sometimes glaucous, linear to oblong, semiterete or ± laminar, 4–20 × 1–2 mm, base not spurred, not scarious, apex obtuse, (surfaces usually glabrous or, rarely, glandular-hairy).

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.

lax to ± dense cymes, 2–8-flowered or flowers solitary, 2–4-branched;

branches not recurved, not forked;

bracts similar to leaves, smaller.

Pedicels

absent or 0.4–3+ mm.

to 0.5 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.

5–9-merous;

sepals erect, connate basally, green, broadly triangular, equal, ca. 2 × 1 mm, apex acute, (glandular-pubescent);

petals spreading, distinct, white with pinkish midvein, lanceolate, not carinate, 4–5(–7) mm, apex narrowly acuminate;

filaments white;

anthers dark purple;

nectar scales white, spatulate-quadrate.

Carpels

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

stellate-spreading in fruit, connate basally, white or pale pink.

2n

= 24.

= 40.

Sedum oreganum

Sedum hispanicum

Phenology Flowering spring–summer.
Habitat Rocks and waste places
Elevation 0-1000 m (0-3300 ft)
Distribution
from FNA
AK; CA; OR; WA; BC
[WildflowerSearch map]
[BONAP county map]
from FNA
MA; MI; NY; UT; VT; ON; QC; s Europe; c Europe (Balkan Peninsula, Caucasus region); sw Asia (n Iran, Lebanon, Palestine, Turkey) [Introduced in North America]
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

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

Sedum hispanicum has been naturalized in North America since 1880; it is sometimes cultivated.

(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. FNA vol. 8, p. 212.
Parent taxa Crassulaceae > Sedum 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
S. acre, S. albomarginatum, S. album, S. annuum, S. borschii, S. cockerellii, S. debile, S. divergens, S. glaucophyllum, S. havardii, 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. 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
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) Linnaeus: Cent. Pl. I, 12. 1755 ,
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