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Oregon stonecrop

Havard's stonecrop

Habit Herbs, perennial, multi-stemmed from base, glabrous. Herbs or subshrubs, perennial, not tufted, glabrous.
Stems

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

procumbent, creeping, or spreading, with ascending or erect branches, (tuberculate), not bearing rosettes.

Flowering shoots

erect, simple or branched, 8–13 cm;

leaf blades spatulate or cuneate, base short-spurred;

offsets not formed.

erect, simple, 1–5 cm, (papillose);

leaf blades elliptic, 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.

alternate, (imbricate to subimbricate), erect to spreading, sessile;

blade bright green, sometimes glaucous, suboblong to ovate, somewhat flattened to terete, 4–9 × 1–2 mm, base widened, short-spurred, not scarious, apex obtuse, (surfaces smooth or papillose).

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.

3-parted cymes, 2–10-flowered or flowers solitary, simple or monochasially 1-branched;

branches erect to slightly recurved, not forked;

bracts similar to leaves, sometimes imbricate.

Pedicels

absent or 0.4–3+ mm.

absent or to 1.5 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-merous;

sepals erect to suberect, distinct basally, green to pinkish, linear or lanceolate, slightly unequal, 3–5 × 0.2–1 mm, apex obtuse;

petals spreading, distinct basally, white, suboblong, not carinate, 5–6.5 mm, apex obtuse, shortly mucronate;

filaments white to pale pink;

anthers red or purplish;

nectar scales whitish to pale pink, oblong, (retuse).

Carpels

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

divergent or stellately spreading in fruit, distinct, red to purple or stramineous with reddish to purplish striations.

2n

= 24.

= ca. 36–50, 68–72.

Sedum oreganum

Sedum havardii

Phenology Flowering spring–fall.
Habitat Igneous rock outcrops or talus in oak-pinyon woodlands and chaparral
Elevation 1500-2500 m (4900-8200 ft)
Distribution
from FNA
AK; CA; OR; WA; BC
[WildflowerSearch map]
[BONAP county map]
from FNA
TX; Mexico (Coahuila)
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

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

Of conservation concern.

(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. 214.
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. 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. 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) Rose: in N. L. Britton et al., N. Amer. Fl. 22: 74. 1905 (as havardi),
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