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Lupinus brevicaulis

sand lupine, short stem blue lupine, short-stem lupine

beach blue lupine, Chamisso bush lupine, dune bush lupine, silver dune lupine

Habit Herbs, annual, usually less than 1 dm, pubescent, hairs more than 1 mm. Shrubs, 5–20 dm, silver, densely appressed-hairy.
Stems

very short, tufted, branched.

erect or ascending, branched.

Leaves

cauline, crowded near base;

stipules well developed;

petiole 1–6 cm;

leaflets (3 or)5–9, blades 8–20 × 2–9 mm, adaxial surface glabrous.

cauline;

stipules 8–10 mm;

petiole 1–3.5 cm;

leaflets 5–9, blades 10–25 × 3–6 mm, adaxial surface pubescent.

Racemes

dense, 3–16-flowered, 1–8 cm;

flowers spirally arranged, crowded.

5–20 cm;

flowers ± whorled.

Peduncles

1–8(–10) cm;

bracts persistent, straight, 2–3 mm.

2–6 cm;

bracts deciduous, 7–10 mm.

Pedicels

0.3–1.5 mm.

4–8 mm.

Flowers

6–8 mm;

calyx abaxial lobe entire or shallowly cleft, ± 6 mm, adaxial lobe 2-toothed, 3 mm, less than 1/2 as long as abaxial;

corolla bright blue, banner spot white or yellow, keel glabrous.

8–16 mm;

calyx bulge or spur 0–1 mm, abaxial lobe entire, 7–9 mm, adaxial lip deeply lobed, 5–7 mm;

corolla light violet to blue, banner patch persistently yellow, banner densely hairy abaxially, lower keel margins ± ciliate, adaxial margins glabrous.

Legumes

not undulate, 1 cm, thinly pilose to coarsely hirsute.

2.5–3.5 cm, hairy.

Cotyledons

persistent, disclike, sessile.

deciduous, petiolate.

Seeds

1 or 2, smooth.

4–8, mottled brown, 4–5 mm.

Lupinus brevicaulis

Lupinus chamissonis

Phenology Flowering spring. Flowering Mar–Jul.
Habitat Sandy washes, open areas, grasslands, pinyon pine-juniper forests, creosote bush scrub, mesquite. Coastal strands, dunes.
Elevation 300–2400 m. (1000–7900 ft.) 0–10 m. (0–0 ft.)
Distribution
from FNA
AZ; CA; CO; NM; NV; OR; UT; WY; Mexico (Chihuahua, Sonora)
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Lupinus brevicaulis resembles L. flavoculatus except that its flowers are smaller.

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

Lupinus chamissonis is known along the immediate coast from Los Angeles to Sonoma counties.

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

Source FNA vol. 11. FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Lupinus Fabaceae > subfam. Faboideae > Lupinus
Sibling taxa
L. adsurgens, L. affinis, L. albicaulis, L. albifrons, L. andersonii, L. angustiflorus, L. antoninus, L. apertus, L. arboreus, L. arbustus, L. arcticus, L. argenteus, L. arizonicus, L. benthamii, L. bicolor, L. breweri, L. cervinus, L. chamissonis, L. citrinus, L. concinnus, L. constancei, L. covillei, L. croceus, L. dalesiae, L. diffusus, L. duranii, L. elatus, L. elmeri, L. excubitus, L. flavoculatus, L. formosus, L. fulcratus, L. gracilentus, L. grayi, L. guadalupensis, L. havardii, L. hirsutissimus, L. huachucanus, L. hyacinthinus, L. kingii, L. kuschei, L. lapidicola, L. latifolius, L. lepidus, L. leucophyllus, L. littoralis, L. longifolius, L. ludovicianus, L. luteolus, L. magnificus, L. malacophyllus, L. microcarpus, L. nanus, L. neomexicanus, L. nevadensis, L. nipomensis, L. nootkatensis, L. obtusilobus, L. odoratus, L. onustus, L. oreganus, L. pachylobus, L. padrecrowleyi, L. peirsonii, L. perennis, L. polyphyllus, L. pratensis, L. pusillus, L. rivularis, L. sabineanus, L. sericatus, L. sericeus, L. shockleyi, L. sierrae-blancae, L. sparsiflorus, L. spectabilis, L. stiversii, L. subcarnosus, L. succulentus, L. sulphureus, L. texensis, L. tidestromii, L. tracyi, L. truncatus, L. uncialis, L. villosus, L. westianus
L. adsurgens, L. affinis, L. albicaulis, L. albifrons, L. andersonii, L. angustiflorus, L. antoninus, L. apertus, L. arboreus, L. arbustus, L. arcticus, L. argenteus, L. arizonicus, L. benthamii, L. bicolor, L. brevicaulis, L. breweri, L. cervinus, L. citrinus, L. concinnus, L. constancei, L. covillei, L. croceus, L. dalesiae, L. diffusus, L. duranii, L. elatus, L. elmeri, L. excubitus, L. flavoculatus, L. formosus, L. fulcratus, L. gracilentus, L. grayi, L. guadalupensis, L. havardii, L. hirsutissimus, L. huachucanus, L. hyacinthinus, L. kingii, L. kuschei, L. lapidicola, L. latifolius, L. lepidus, L. leucophyllus, L. littoralis, L. longifolius, L. ludovicianus, L. luteolus, L. magnificus, L. malacophyllus, L. microcarpus, L. nanus, L. neomexicanus, L. nevadensis, L. nipomensis, L. nootkatensis, L. obtusilobus, L. odoratus, L. onustus, L. oreganus, L. pachylobus, L. padrecrowleyi, L. peirsonii, L. perennis, L. polyphyllus, L. pratensis, L. pusillus, L. rivularis, L. sabineanus, L. sericatus, L. sericeus, L. shockleyi, L. sierrae-blancae, L. sparsiflorus, L. spectabilis, L. stiversii, L. subcarnosus, L. succulentus, L. sulphureus, L. texensis, L. tidestromii, L. tracyi, L. truncatus, L. uncialis, L. villosus, L. westianus
Name authority S. Watson: Botany (Fortieth Parallel), 53, plate 7, figs. 1–4. (1871) Eschscholtz: Mém. Acad. Imp. Sci. St. Pétersbourg Hist. Acad. 10(2): 288. (1826)
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