Flora of North America species comparison

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Lupinus texensis

Texas bluebonnet, Texas lupine
Habit Herbs, annual, 1.5–4 dm, pubescent, hair appressed or ascending.
Stems

ascending or erect, branched.
Leaves

cauline, crowded near base;

petiole 2–6 cm;

leaflets 5 or 6(or 7), blades 10–25 × 6–12 mm, adaxial surface glabrous.
Racemes

2–12 cm;

flowers spirally arranged.
Peduncles

3–6 cm;

bracts deciduous, 2–3 mm.
Pedicels

4–6 mm.
Flowers

10–13 mm;

calyx 6–8 mm, abaxial lobe entire or cleft, 4–5 mm, adaxial lobe cleft, 2–3 mm, hairs silvery;

corolla usually dark blue, rarely white, banner spot bright white, keel glabrous, wings flat.
Legumes

2.5–3.5 cm, white silky-villous.
Cotyledons

deciduous, petiolate.
Seeds

4 or 5.
2n

= 36.

Lupinus texensis
Phenology Flowering spring–summer.
Habitat Prairies, open fields, pas­tures, roadsides.
Elevation 0–600 m. (0–2000 ft.)
Distribution
from FNA
FL; LA; OK; TX; Mexico (Coahuila, Nuevo Léon, Tamaulipas)
[WildflowerSearch map]
[BONAP county map]
Discussion

Lupinus texensis is introduced in Florida in Alachua and Pinellas counties. In Texas, it is widespread in the southern two-thirds of the state.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa 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. sierrae-blancae, L. sparsiflorus, L. spectabilis, L. stiversii, L. subcarnosus, L. succulentus, L. sulphureus, L. tidestromii, L. tracyi, L. truncatus, L. uncialis, L. villosus, L. westianus
Name authority Hooker: Bot. Mag. 63: plate 3492. (1836)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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