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chick lupine, wide-bannered lupine

Photo is of parent taxon

chick lupine, dense-flower lupine

Habit Herbs, annual, 1–8 dm, sparsely to densely pubescent.
Stems

ascending or erect, branched near base or middle, or unbranched, hollow, at least near base.

Leaves

cauline;

petiole 3–15 cm;

leaflets 5–9(–11), blades 10–50 × 2–12 mm, adaxial surface glabrous.

Bracts

with long, shaggy hairs.

Racemes

4–60 cm;

flowers in crowded to widely spaced whorls.

Peduncles

2–30 cm;

bracts persistent, reflexed, 3.5–12 mm.

Pedicels

0.5–5 mm.

Flowers

8–18 mm;

calyx appendages usually absent, sometimes present, abaxial lobe 5–11 mm, adaxial lobe 2–6 mm;

corolla white to dark yellow, pink to dark rose, or lavender to purple, lower wing margins sometimes ciliate, upper margins usually ciliate near claw, upper keel margins usually ciliate near claw, lower margins sometimes ciliate but not as densely.

Corolla

pink to rose, or lavender to purple, rarely yellowish or white;

wings withering, linear to lanceolate, lower margins rarely ciliate, upper margins ciliate near claw;

lower keel margins sometimes ciliate near claw.

Calyces

with long, shaggy hairs;

appendages usually absent.

Legumes

1–1.8 cm, pubescent.

usually erect or spreading.

Cotyledons

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

Seeds

2, tan to brown, usually mottled, ridged or smooth.

2n

= 48.

Lupinus microcarpus

Lupinus microcarpus var. microcarpus

Phenology Flowering late spring–summer.
Habitat Open or disturbed areas.
Elevation 0–1600 m. (0–5200 ft.)
Distribution
from USDA
w North America; nw Mexico; South America
[WildflowerSearch map]
from FNA
AZ; CA; NV; OR; WA; BC; Mexico (Baja California); South America (Argentina, Chile)
Discussion

Varieties 3 (3 in the flora).

Lupinus microcarpus is highly variable and with varieties intergrading.

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

Variety microcarpus is introduced in Arizona (Gila County).

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

Key
1. Wings broadly elliptic, persistent and becoming translucent, upper and usually lower margins ciliate near claw; lower keel margins ciliate near claw; calyx appendages 1–2 mm.
var. horizontalis
1. Wings linear to oblanceolate, withering, not becoming translucent, upper margins usually ciliate near claw, lower rarely; lower keel margins sometimes ciliate near claw or sparsely so; calyx appendages usually absent.
→ 2
2. Calyx and flower bracts with long shaggy hairs; legumes usually erect or spreading.
var. microcarpus
2. Calyx and flower bracts with few short and appressed, or long and spreading hairs; legumes usually secund, sometimes spreading.
var. densiflorus
Source FNA vol. 11. FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Lupinus Fabaceae > subfam. Faboideae > Lupinus > Lupinus microcarpus
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. 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. microcarpus var. densiflorus, L. microcarpus var. horizontalis
Subordinate taxa
L. microcarpus var. densiflorus, L. microcarpus var. horizontalis, L. microcarpus var. microcarpus
Synonyms L. densiflorus subsp. austrocollium, L. densiflorus var. austrocollium, L. densiflorus var. crinitus, L. densiflorus var. palustris, L. densiflorus var. persecundus, L. microcarpus var. ruber, L. microcarpus var. scopulorum, L. ruber, L. subvexus, L. subvexus var. albilanatus, L. subvexus var. fluviatilis, L. subvexus var. phoeniceus, L. subvexus var. transmontanus
Name authority Sims: Bot. Mag. 50: plate 2413. (1823) unknown
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