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|Jepson eFlora: Taxon page
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|Family: Fabaceae (Leguminosae)||View Description||Dichotomous Key|
|Genus: Lupinus||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Lupinus arboreus Sims
Habit: Shrub < 20 dm, green-glabrous to silver-hairy. Stem: erect. Leaf: cauline; stipules 8--12 mm; petiole 2--3(6) cm; leaflets 5--12, 20--60 mm. Inflorescence: 10--30 cm, flowers whorled or not; peduncle 4--10 cm; pedicels 4--10 mm; bract 8--10 mm. Flower: 14--18 mm; calyx upper lip 5--9 mm, 2-toothed, lower 5--7 mm, entire; petals generally yellow (lilac to purple, especially north of central NCo), banner back glabrous, spot darker or not to white, keel upper margins ciliate claw to tip, lower glabrous. Fruit: 4--7 cm, brown to black, hairy. Seed: 8--12, 4--5 mm, black to tan, often striped lighter.
Ecology: Coastal bluffs, dunes, or more inland; Elevation: < 100 m. Bioregional Distribution: NCo, CCo, SnFrB, SCo, ChI (probably naturalized n of Sonoma Co.). Flowering Time: Apr--Jul Note: Grades +- into Lupinus rivularis in NCo. Plants with yellow petals, sweet-smelling flowers widely cultivated as sand binder. If recognized taxonomically, hairier plants from western SnFrB (yellow banner, blue wings) assignable to Lupinus arboreus var. eximius (Burtt Davy) C.P. Sm.; plants with glabrous leaflets, purple petals assignable to Lupinus propinquus Greene (study needed).
Unabridged Note: If recognized taxonomically, hairier plants from western SnFrB (yellow banner, blue wings) assignable to Lupinus arboreus var. eximius (Burtt Davy) C.P. Sm., plants with glabrous leaflets, purple petals assignable to Lupinus propinquus Greene; study needed.
eFlora Treatment Author: Teresa Sholars
Jepson Online Interchange
Previous taxon: Lupinus apertus
Next taxon: Lupinus arbustus
Citation for this treatment: Teresa Sholars 2017. Lupinus arboreus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=31731, accessed on January 22, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on January 22, 2017.