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Vascular Plants of California
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Lupinus arbustus
SPUR LUPINE


Higher Taxonomy
Family: Fabaceae (Leguminosae)View DescriptionDichotomous Key
Common Name: LEGUME FAMILY
Habit: Annual to tree. Leaf: generally alternate, generally compound, generally stipuled, generally entire, pinnately veined Inflorescence: generally raceme, spike, umbel or head; or flowers 1--few in axils. Flower: generally bisexual, generally bilateral; hypanthium 0 or flat to tubular; sepals generally 5, generally fused; petals generally 5, free, fused, or lower 2 +- united into keel (see 3, Key to Groups, for banner, wings); stamens 10 or many (or [1], 5, 6, 7, 9), free or fused or 10 with 9 filaments at least partly fused, 1 (uppermost) free; pistil 1, ovary superior, generally 1-chambered, ovules 1--many, style, stigma 1. Fruit: legume, including a stalk-like base (above receptacle) or not. Seed: 1--many, often +- reniform, generally hard, smooth.
Genera In Family: +- 730 genera, 19400 species: worldwide; with grasses, requisite in agriculture, most natural ecosystems. Many cultivated, most importantly Arachis, peanut; Glycine, soybean; Phaseolus, beans; Medicago, alfalfa; Trifolium, clovers; many orns. Note: Unless stated otherwise, fruit length including stalk-like base, number of 2° leaflets is per 1° leaflet. Upper suture of fruit adaxial, lower abaxial. Anthyllis vulneraria L. evidently a waif, a contaminant of legume seed from Europe. Laburnum anagyroides Medik., collected on Mount St. Helena in 1987, may be naturalized. Ceratonia siliqua L., carob tree (Group 2), differs from Gleditsia triacanthos L. in having evergreen (vs deciduous) leaves that are 1-pinnate (vs 1-pinnate on spurs on old stems, 2-pinnate on new stems) with 2--5(8) (vs 7--17) 1° leaflets, commonly cultivated, now naturalized in southern California. Aeschynomene rudis Benth. , Halimodendron halodendron (Pall.) Voss (possibly extirpated), Lens culinaris Medik. are agricultural weeds. Caragana arborescens Lam. only cult. Ononis alopecuroides L. , Sphaerophysa salsula (Pall.) DC. all evidently extirpated. Cercidium moved to Parkinsonia; Chamaecytisus to Cytisus; Psoralidium lanceolatum to Ladeania.
eFlora Treatment Author: Martin F. Wojciechowski, except as noted
Scientific Editor: Martin F. Wojciechowski, Thomas J. Rosatti.
Genus: LupinusView DescriptionDichotomous Key


Common Name: LUPINE
Habit: Annual to shrub; cotyledons generally petioled, withering early. Stem: generally erect. Leaf: palmately compound [or not], generally cauline; stipules fused to petiole; leaflets 3--17, generally oblanceolate, entire. Inflorescence: raceme, flowers spiraled or whorled, occasionally also in lower leaf axils; bracts generally deciduous. Flower: calyx 2-lipped, lobes entire or toothed, generally appendaged between; corolla blue, purple, white, or yellow, banner glabrous to densely hairy, centrally grooved, sides reflexed, wing tips +- fused, keel generally beaked; stamens 10, filaments fused, 5 long with short anthers, 5 short with long anthers; style brush-like. Fruit: dehiscent, generally oblong. Seed: 2--12, generally smooth.
Species In Genus: +- 220 species: especially western North America, western South America to eastern United States, also tropical South America, Mediterranean to western Asia, eastern tropical Africa; some cultivated for fodder, green manure, edible seed, ornamental. Etymology: (Latin: wolf, from mistaken idea that plants rob soil of nutrients) Toxicity: Some (e.g., Lupinus arboreus, Lupinus latifolius, Lupinus leucophyllus) have alkaloids (especially in seeds, fruits, young herbage) TOXIC to livestock (especially sheep). Note: Inflorescence length excludes peduncle; some California species naturalized in eastern North America, South America, Australia, southern Africa.
eFlora Treatment Author: Teresa Sholars & Rhonda Riggins
Reference: Barneby 1989 Intermountain Flora 3(B):237--267; Isely 1998 Native and Naturalized Leguminosae (Fabaceae) US. M.L. Bean Museum, Brigham Young University
Lupinus arbustus Douglas
NATIVE
Habit: Perennial herb 2--7 dm, green or gray-silky. Stem: erect. Leaf: cauline and occasionally basal; stipules 4--9 mm; petiole 2--16 cm; leaflets 7--13, 20--70 mm. Inflorescence: 3--18 cm, open, flowers whorled; peduncle 2--5 cm; pedicels 1--7 mm; bract 3--6 mm. Flower: 8--14 mm; calyx spur distinct, 1--3 mm, upper lip 2--4 mm, 2-toothed, lower 2.5--5 mm, 3-toothed; petals blue, purple, pink, white, or +- yellow, banner back hairy, spot white, +- yellow, or 0, wings with dense patch of hair outside near tip, keel upper margins ciliate, lower glabrous. Fruit: 2--3 cm, silky. Seed: 3--6, 5--6 mm, tan.
Ecology: Open sagebrush scrub, mixed-conifer forest; Elevation: 1500--3000 m. Bioregional Distribution: CaRH, SNH, SnGb, GB; Distribution Outside California: to Oregon, Idaho, Utah. Flowering Time: May--Jul Note: Like Lupinus argenteus except wing hairs.
Synonyms: Lupinus arbustus subsp. calcaratus (Kellogg) D.B. Dunn; Lupinus arbustus var. montanus (Howell) D.B. Dunn; Lupinus arbustus subsp. silvicola (A. Heller) D.B. Dunn; Lupinus silvicola A. Heller
Jepson eFlora Author: Teresa Sholars & Rhonda Riggins
Reference: Barneby 1989 Intermountain Flora 3(B):237--267; Isely 1998 Native and Naturalized Leguminosae (Fabaceae) US. M.L. Bean Museum, Brigham Young University
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botanical illustration including Lupinus arbustus

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Citation for this treatment: Teresa Sholars & Rhonda Riggins 2012, Lupinus arbustus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=31733, accessed on October 15, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on October 15, 2019.

Lupinus arbustus
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© 2006 George W. Hartwell
Lupinus arbustus
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© 2000 Gary A. Monroe
Lupinus arbustus
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© 2005 Steve Matson
Lupinus arbustus subsp. calcaratus
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© 2005 Christopher L. Christie
Lupinus arbustus
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© 2000 Gary A. Monroe
Lupinus arbustus
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© 2005 Steve Matson

More photos of Lupinus arbustus in CalPhotos



Geographic subdivisions for Lupinus arbustus:
CaRH, SNH, SnGb, GB
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).





 

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Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.