Lupinus arboreus |
Lupinus microcarpus |
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tree lupine, yellow bush lupine |
chick lupine |
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Habit | Plants perennial, 10–20 dm. | Plants annual, 1–5(7) dm. |
Stems | ascending to erect; woody, obscurely to slightly pubescent. |
decumbent to erect, pubescent. |
Leaves | cauline; leaflets 5–10(12), 15–60 × 4–10 mm, linear-elliptic to oblanceolate; tips acute, usually apiculate; surfaces abaxially pubescent to sericeous, adaxially glabrate to pubescent; petioles (15)20–40 mm. |
mostly sub-basal; leaflets (5)7–11, 10–60 × 2–12 mm, linear-elliptic to oblanceolate or obovate; tips rounded to acute, often apiculate; surfaces abaxially sparsely villous, adaxially glabrous; petioles 25–119 mm. |
Inflorescences | (4.5)7.5–21 cm; peduncles (3)5–11.5 cm; pedicels 5–11 mm. |
(2)4–12(20) cm; peduncles 4–10.5 cm; pedicels 1–3 mm. |
Flowers | calyces 8–10 mm, not spurred; lips equal to subequal; corollas (12)14–18 mm, usually yellow, rarely yellow and blue or purple; banners typical type; spot absent. |
calyces (6.5)7.5–17 mm, not spurred; lips unequal; corollas 0.9–1.7 cm, purple to lilac, sometimes pink or pink-purple; banners cup type; spot absent. |
Fruits | (20)30–70 mm, villous. |
10–16(20) mm, sericeous. |
Seeds | 2–8. |
2–3. |
Lupinus arboreus |
Lupinus microcarpus |
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Distribution | ||
Discussion | Dunes, sandy areas. Flowering Apr–Jul. 0–300 m. Est, WV. CA, WA; north to British Columbia. Native and exotic. While usually occurring near the ocean, Lupinus arboreus is occasionally found further inland, often as an ornamental plant in parking lot vegetation strips. This species appears to be expanding its range northward. It may occasionally hybridize with L. littoralis. |
Disturbed areas, roadsides, meadows, chaparral, sagebrush. Flowering May–Jul. 300–1700 m. BR, ECas, Lava, Owy, Sisk. CA, WA; north to British Columbia; Chile. Native. |
Source | Flora of Oregon, volume 2, page 699 Paul Severns, Stephen Meyers, Christopher Royce |
Flora of Oregon, volume 2, page 703 Paul Severns, Stephen Meyers, Christopher Royce |
Sibling taxa | ||
Synonyms | Lupinus densiflorus var. densiflorus, Lupinus microcarpus var. microcarpus, Lupinus subvexus var. transmontanus | |
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