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Lupinus brevicaulis

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

Texas bluebonnet

Habit Herbs, annual, usually less than 1 dm, pubescent, hairs more than 1 mm. Herbs, annual, 1.5–4 dm, pubescent, hairs appressed or ascending.
Stems

very short, tufted, branched.

ascending or erect, 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, often crowded near base;

petiole 1–6 cm;

leaflets 5 or 6, blades 10–25 × 4–15 mm, adaxial surface glabrate.

Racemes

dense, 3–16-flowered, 1–8 cm;

flowers spirally arranged, crowded.

6–12 cm;

flowers crowded or spaced, spirally arranged, crowded on young growth.

Peduncles

1–8(–10) cm;

bracts persistent, straight, 2–3 mm.

3–8 cm;

bracts deciduous, 2.5–3 mm.

Pedicels

0.3–1.5 mm.

3–7 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.

9–12 mm;

calyx 5–6 mm, abaxial lobe 3-lobed, 3–4 mm, adaxial lobe cleft, 2–2.5 mm, hairs becoming yellowish gray or brown on dried material;

corolla pale blue-violet, banner spot white, keel glabrous, wings inflated.

Legumes

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

2.5–3.5 cm, yellowish gray- or brown-villous.

Cotyledons

persistent, disclike, sessile.

usually persistent, petiolate.

Seeds

1 or 2, smooth.

4 or 5.

2n

= 36.

Lupinus brevicaulis

Lupinus subcarnosus

Phenology Flowering spring. Flowering spring.
Habitat Sandy washes, open areas, grasslands, pinyon pine-juniper forests, creosote bush scrub, mesquite. Sandy soils, roadsides, open woodlands, coastal plains.
Elevation 300–2400 m. (1000–7900 ft.) 0–300 m. (0–1000 ft.)
Distribution
from FNA
AZ; CA; CO; NM; NV; OR; UT; WY; Mexico (Chihuahua, Sonora)
[WildflowerSearch map]
[BONAP county map]
from FNA
TX; Mexico (Coahuila, Nuevo Léon)
[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 subcarnosus is abundant and conspicuous in the coastal plain of southeastern Texas and extends into northern Mexico.

(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. 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. 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) Hooker: Bot. Mag. 63: plate 3467. (1836)
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