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Oak Ridge lupine, skyblue lupine

harlequin annual lupine, harlequin lupine

Habit Herbs, usually perennial, sometimes annual or biennial, 2–8 dm, densely silky-pubescent, silvery becoming rusty or tawny. Herbs, annual, 1–5 dm, sparsely pubescent.
Stems

decumbent, spreading, many branched.

ascending or erect, branched near middle.

Leaves

basal, clustered;

stipules 20–150 mm;

petiole 2.5–10 cm;

leaflet 1, blades 40–120 × 18–33 mm, adaxial surface densely sericeous or strigulose.

cauline;

petioles 2–8 cm;

leaflets usually 7, blades bright green, 20–50 × 5–15 mm, adaxial surface sparsely pubescent.

Racemes

8–30 cm;

flowers whorled.

dense, 5–10 cm;

flowers spirally arranged.

Peduncles

3–4 cm;

bracts deciduous, 4–8 mm.

8–18 cm;

bracts tardily deciduous, 3–5 mm.

Pedicels

1–4 mm.

1.5–4 mm.

Flowers

11–15 mm;

calyx abaxial lobe entire, 5–10 mm, adaxial lobe 3-fid with 2 linear laterals, 4–8 mm;

corolla light to deep blue, limb centrally white at base, banner spot white to cream, glabrous abaxially, keel glabrous.

13–18 mm;

calyx abaxial lobe entire, 5–7 mm, adaxial lobe deeply cleft, 4–6 mm;

corolla banner yellow, wings usually pink, rarely white, keel white, lower and upper margins ciliate from claw to middle.

Legumes

3–5 cm, appressed villous to sericeous.

2 cm, glabrous or glabrate.

Cotyledons

deciduous, petiolate.

deciduous, petiolate.

Seeds

4–7, gray mottled black, 4 mm.

usually 5.

Lupinus diffusus

Lupinus stiversii

Phenology Flowering Mar–May (year-round). Flowering late spring (Apr–Jul).
Habitat Sandhills, sand pine scrub, open woodlands. Clearings, open areas, chaparral, oak woodlands, yellow pine forest.
Elevation 0–50 m. (0–200 ft.) 100–2200 m. (300–7200 ft.)
Distribution
from FNA
AL; FL; GA; MS; NC; SC
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Lupinus diffusus differs from the other unifoliolate species in its much shorter pubescence and banners with a white eyespot. Lupinus cumulicola represents peninsular Florida forms that have strongly ascending foliose stems and sometimes broader leaves than usual. Some plants of L. diffusus from southern Florida have a vesture of hairs that approach those of L. villosus in length.

Lupinus diffusus seeds are known to be toxic (D. J. Wagstaff 2008).

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

Lupinus stiversii is found in the Sierra Nevada, the northern portion of Southern Coast Ranges (Monterey County), the San Gabriel Mountains, and the San Bernardino Mountains.

(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. 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. 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. subcarnosus, L. succulentus, L. sulphureus, L. texensis, L. tidestromii, L. tracyi, L. truncatus, L. uncialis, L. villosus, L. westianus
Synonyms L. cumulicola
Name authority Nuttall: Gen. N. Amer. Pl. 2: 93. (1818) Kellogg: Proc. Calif. Acad. Sci. 2: 192, fig. 58. (1863) — (as stiverii)
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