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bushy yellow lupine, butter lupine

Habit Plants annual, 3–10 dm.
Stems

erect, strigillose.

Leaves

cauline;

leaflets (5)6–8(9), 8–40 × 4–11 mm, linear to oblanceolate;

tips rounded;

surfaces abaxially strigose, adaxially glabrate to strigose;

petioles 11–64 mm.

Inflorescences

(2.5)3.3–10.4(13.5) cm;

peduncles 2.7–10.6 cm;

pedicels 1–3 mm.

Flowers

calyces not spurred;

lips unequal;

corollas 1–1.4(1.6) cm, usually yellow, rarely pink to bright blue;

banners cup type; spot absent.

Fruits

(10)12–15 mm, strigose to sericeous.

Seeds

(1)2.

Lupinus truncatus

Lupinus luteolus

Distribution
[WildflowerSearch map]
[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
Discussion

Meadows, roadsides, openings in forests. Flowering Jun–Aug. 300–1600 m. ECas, Sisk. CA. Native.

Source Flora of Oregon, volume 2, page 703
Paul Severns, Stephen Meyers, Christopher Royce
Sibling taxa
L. affinis, L. albicaulis, L. albifrons, L. arboreus, L. arbustus, L. arbustus x Lupinus oreganus, L. arbustus x Lupinus sericeus, L. argenteus, L. bicolor, L. brevicaulis, L. breweri, L. latifolius, L. lepidus, L. leucophyllus, L. leucophyllus x Lupinus sericeus, L. littoralis, L. luteolus, L. microcarpus, L. nevadensis, L. onustus, L. oreganus, L. polyphyllus, L. pusillus, L. rivularis, L. sabinianus, L. sericeus, L. sulphureus, L. tracyi, L. uncialis
L. affinis, L. albicaulis, L. albifrons, L. arboreus, L. arbustus, L. arbustus x Lupinus oreganus, L. arbustus x Lupinus sericeus, L. argenteus, L. bicolor, L. brevicaulis, L. breweri, L. latifolius, L. lepidus, L. leucophyllus, L. leucophyllus x Lupinus sericeus, L. littoralis, L. microcarpus, L. nevadensis, L. onustus, L. oreganus, L. polyphyllus, L. pusillus, L. rivularis, L. sabinianus, L. sericeus, L. sulphureus, L. tracyi, L. uncialis
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