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long lupine, Peirson's lupine

bushy yellow lupine, butter lupine, pale yellow lupine

Habit Herbs, perennial, 3–6 dm, silver-silky. Herbs, annual, 3–16(–20) dm, sparsely pubescent or glabrate, appearing glaucous.
Stems

erect, branched from just above ground.

ascending or erect, branched near middle or unbranched.

Leaves

cauline, clustered at base, ± fleshy;

stipules 15–20 mm;

petiole 2–15 cm;

leaflets 5–8, blades widely oblanceolate, 25–70 × 10–30 mm, surfaces silver-silky.

cauline;

petiole 2–5 cm;

leaflets 7–9, blades 10–30 × 4–9 mm, adaxial surface usually pubescent.

Racemes

1–1.5 cm;

flowers ± whorled.

9–35 cm;

flowers in crowded whorls.

Peduncles

1–2.5 cm;

bracts deciduous, 5–7 mm.

4–15 cm;

bracts persistent, reflexed, 5–11 mm, pubescent.

Pedicels

1–2 mm.

1–3 mm.

Flowers

10–12 mm;

calyx bulge or spur 0–1 mm, abaxial lobe entire, 5–7 mm, adaxial lobe obscurely 2-toothed, 4–6 mm;

corolla yellow, banner usually hairy abaxially, lower keel margins glabrous, adaxial margin ciliate middle to tip.

10–16 mm;

calyx appendages usually absent, abaxial lobe entire, 6–10 mm, adaxial lobe entire, 3–5 mm;

corolla usually pale yellow, sometimes pinkish or bright blue, lower wing margins rarely ciliate, upper margins ciliate near claw, lower and upper keel margins densely ciliate near claw.

Legumes

3–4 cm, silky.

1–1.5 cm, pubescent.

Cotyledons

deciduous, petiolate.

persistent or deciduous, disclike (leaving a circular scar), sessile.

Seeds

3–5.

2, dark brown, tuberculate.

Lupinus peirsonii

Lupinus luteolus

Phenology Flowering Apr–Jun. Flowering spring–early summer.
Habitat Gravelly or rocky areas, Joshua tree woodland, montane coniferous forests, pinyon and juniper woodlands. Clearings, open or disturbed areas.
Elevation 1000–2500 m. (3300–8200 ft.) 0–1900 m. (0–6200 ft.)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; OR
[WildflowerSearch map]
[BONAP county map]
Discussion

Lupinus peirsonii is known only from the San Gabriel Mountains in Los Angeles County.

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

Lupinus luteolus is known primarily from the North Coast area in California, with isolated collections from the Diablo Range and Western Transverse Ranges. It is known from Oregon in Douglas, Jackson, and Klamath counties.

Lupinus luteolus from Siskiyou County in California to the Klamath Range of southern Oregon and northern California often (in about 50% of specimens) has leaflets that are glabrous adaxially. Plants from Round Valley, Mendocino County, are unusually tall and sometimes have flowers blue at anthesis; they are sometimes recognized as L. milobakeri.

(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. brevicaulis, 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. 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. 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. 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
Synonyms L. luteolus var. albiflorus, L. milobakeri
Name authority H. Mason: Madroño 1: 187. (1928) — (as peirsoni) Kellogg: Proc. Calif. Acad. Sci. 5: 38. (1873)
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