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chick lupine, wide-bannered lupine

Texas bluebonnet

Habit Herbs, annual, 1–8 dm, sparsely to densely pubescent. Herbs, annual, 1.5–4 dm, pubescent, hairs appressed or ascending.
Stems

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

ascending or erect, branched.

Leaves

cauline;

petiole 3–15 cm;

leaflets 5–9(–11), blades 10–50 × 2–12 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

4–60 cm;

flowers in crowded to widely spaced whorls.

6–12 cm;

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

Peduncles

2–30 cm;

bracts persistent, reflexed, 3.5–12 mm.

3–8 cm;

bracts deciduous, 2.5–3 mm.

Pedicels

0.5–5 mm.

3–7 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.

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

1–1.8 cm, pubescent.

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

Cotyledons

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

usually persistent, petiolate.

Seeds

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

4 or 5.

2n

= 36.

Lupinus microcarpus

Lupinus subcarnosus

Phenology Flowering spring.
Habitat Sandy soils, roadsides, open woodlands, coastal plains.
Elevation 0–300 m. (0–1000 ft.)
Distribution
from USDA
w North America; nw Mexico; South America
[WildflowerSearch map]
from FNA
TX; Mexico (Coahuila, Nuevo Léon)
[BONAP county map]
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.)

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.)

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
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. 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
Subordinate taxa
L. microcarpus var. densiflorus, L. microcarpus var. horizontalis, L. microcarpus var. microcarpus
Name authority Sims: Bot. Mag. 50: plate 2413. (1823) Hooker: Bot. Mag. 63: plate 3467. (1836)
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