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Sierra blanca lupine, White Mountain lupine

Lupinus pusillus

intermountain lupine, low lupine, rusty lupine

Habit Herbs, perennial, 6.5–15.2 dm, appearing green and glabrous but finely and inconspicuously pubescent. Herbs, annual, 0.5–2 dm, sparsely pubescent to pilose, hairs more than 1 mm.
Stems

erect, solitary, branched, robust, succulent, hirsutulous.

short and tufted or erect, branched from base or near middle.

Leaves

cauline;

stipules 6–9 mm;

proximal petioles 5–7 cm, withering, distal ones 3.5–6.5 cm;

leaflets 7–10, blades 30–95 × 5–13 mm, abaxial surface finely strigulose, adaxial surface glabrate, yellow-green or gray-green.

cauline, often crowded near base;

stipules well developed;

petiole 1–9 cm;

leaflets 5–9, blades 10–40 × 5–10 mm, adaxial surface glabrous.

Racemes

5–34 cm;

flowers whorled or spirally arranged.

8–12-flowered, 2–11 cm, shorter than or slightly exceeding foliage;

flowers spirally arranged.

Peduncles

4–5 cm;

bracts semi-deciduous, 5–7 mm.

0–3.5 cm;

bracts persistent, straight, 2–5 mm.

Pedicels

2–8(–10) mm.

1–3.5 mm.

Flowers

10–14 mm;

calyx abaxial lobe ± slightly gibbous, 9–15 mm, adaxial lobe slightly notched, 7–11 mm;

corolla pale blue and whitish, banner with conspicuous darker spot, banner glabrous or hairy abaxially, keel falcate, often ± ciliolate distally.

5–12 mm;

calyx abaxial lobe entire, 5–6 mm, adaxial lobe cleft, 2.5–4 mm;

corolla vivid blue, sometimes paler or white, sometimes bicolored, banner spot white or yellowish, keel glabrous.

Legumes

3.5 × 0.8–1 cm, hirsute.

1.5 cm, constricted between seeds, thinly pilose to coarsely hirsute.

Cotyledons

deciduous, petiolate.

persistent, disclike, sessile.

Seeds

5–7.

2, wrinkled or ridged.

2n

= 48.

Lupinus sierrae-blancae

Lupinus pusillus

Phenology Flowering Jun–Aug.
Habitat Meadows in pine or fir forests, roadsides.
Elevation 1800–3100 m. (5900–10200 ft.)
Distribution
from FNA
NM
[BONAP county map]
from USDA
w North America; c North America
[WildflowerSearch map]
[BONAP county map]
Discussion

Lupinus sierrae-blancae is known only from the Sierra Blanca and Sacramento Mountains in Lincoln and Otero counties.

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

Varieties 3 (3 in the flora).

Lupinus pusillus is a highly variable species, with the varieties intergrading.

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

Key
1. Peduncles 0–1 cm; racemes shorter than foliage; flowers 6–8 mm.
var. intermontanus
1. Peduncles usually 1–3.5 cm; racemes equal to or longer than foliage; flowers 7–12 mm.
→ 2
2. Pedicels and calyx tubes strigose.
var. pusillus
2. Pedicels and calyx tubes glabrous.
var. rubens
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. peirsonii, L. perennis, L. polyphyllus, L. pratensis, L. pusillus, L. rivularis, L. sabineanus, L. sericatus, L. sericeus, L. shockleyi, 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. 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
Subordinate taxa
L. pusillus var. intermontanus, L. pusillus var. pusillus, L. pusillus var. rubens
Synonyms L. aquilinus, L. laetus, L. sierrae-blancae subsp. aquilinus
Name authority Wooten & Standley: Contr. U.S. Natl. Herb. 16: 138. (1913) Pursh: Fl. Amer. Sept. 2: 468. 1814[1813]
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