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grape lupine, grape soda lupine, guard lupine

San Luis lupine, San Luis obispo county lupine

Habit Shrubs, 10–20 dm, densely silver appressed-hairy. Herbs, perennial, 3–6 dm, woolly-tomentose.
Stems

erect, branched.

decumbent or erect, branched just above ground, hairs less than 1 mm, not sharp or stiff.

Leaves

cauline;

stipules 5–20 mm;

petiole 4–10 cm;

leaflets 7–9, blades 5–50 × 4–7 mm, adaxial surface densely pubescent, silver-hairy.

cauline, clustered at base;

stipules 7–12 mm;

petiole 5–12 cm;

leaflets 5–9, blades 15–40 × 5–12 mm, adaxial surface densely tomentose to woolly, hairs ± spreading.

Racemes

10–70 cm, rachis persistent;

flowers whorled or not.

10–40 cm;

flowers ± whorled or not.

Peduncles

7–20 cm;

bracts deciduous, 8–9 mm.

stout, 6–10 cm;

bracts deciduous, 7–8 mm.

Pedicels

4–6 mm.

2–5 mm.

Flowers

with distinctive sweet smell, 10–13 mm;

calyx 6–8 mm, bulge or spur 0–1 mm, abaxial lobe entire or 3-toothed, adaxial lobe deeply notched;

corolla violet to lavender, banner patch bright yellow, turning purple, banner usually hairy abaxially, keel usually ± lobed proximally, abaxial margins glabrous, adaxial margin ciliate middle to tip.

10–15 mm;

calyx bulge or spur 0–1 mm, abaxial lobe 3-toothed, 6–8 mm, adaxial lobe deeply notched, 6–7 mm;

corolla bluish to purple, banner patch yellow turning purple to white, banner well reflexed-recurved at or proximal to midpoint, this 3.5–6 mm proximal to apex, banner glabrous or ± hairy abaxially, lower keel margins glabrous, adaxial margin ciliate middle to tip.

Legumes

3–5 cm, silky.

2–3 cm, hairy.

Cotyledons

deciduous, petiolate.

Seeds

5–8, mottled yellow-brown with lateral lines.

3 or 4, mottled grayish, 4–7 mm.

Coty

-ledons deciduous, petiolate.

Lupinus excubitus

Lupinus ludovicianus

Phenology Flowering Apr–Jun. Flowering Apr–Jul.
Habitat Desert slopes, washes. Open, grassy areas, on limestone and sandstone, oak woodlands.
Elevation (700–)1200–2700 m. ((2300–)3900–8900 ft.) 50–600 m. (200–2000 ft.)
Distribution
from FNA
CA; Mexico (Baja California)
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[BONAP county map]
Discussion

Lupinus excubitus is known from Inyo to San Bernardino counties in the Mojave Desert, desert mountains, and southern Sierra Nevada east of the crest (transmontane).

Circumscriptions of Lupinus excubitus have been diverse. See discussion under 32. L. albifrons, under which many varieties now have been treated as synonyms.

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

Lupinus ludovicianus is known only from San Luis Obispo County.

(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. 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. 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 M. E. Jones: Contr. W. Bot. 8: 26. (1898) Greene: Bull. Calif. Acad. Sci. 1: 184. (1885)
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