Flora of North America species comparison

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Lupinus havardii

Big Bend bluebonnet
Habit Herbs, annual, 1–6 dm, ascending- or appressed-villous.
Stems

ascending or erect, usually branched, sometimes unbranched.
Leaves

cauline, often crowded near base;

petiole 2–9 cm, ascending- or appressed-pubescent;

leaflets (5 or)7, blades 10–20 × 5–10 mm, adaxial surface glabrate.
Racemes

18–45 cm;

flowers well spaced, usually spirally arranged.
Peduncles

5.5–10 cm;

bracts deciduous, 4–5 mm.
Pedicels

5–7 mm.
Flowers

10–13(–15) mm;

calyx 6–7 mm, abaxial lobe entire, 6 mm, adaxial lobe 3-cleft, 4 mm;

corolla bright violet-blue, banner spot creamy or yellow, keel glabrous.
Legumes

3.5–5 cm, villous.
Cotyledons

usually persistent, usually inconspicuous, petiolate.
Seeds

6–8.
2n

= 36.

Lupinus havardii
Phenology Flowering late winter–early spring.
Habitat Limestone or igneous basins, flats, drainages, gravelly, sandy or silty soils, creosote-lechuguilla shrublands, roadsides.
Elevation 600–1400 m. (2000–4600 ft.)
Distribution
from FNA
TX; Mexico (Chihuahua)
[BONAP county map]
Discussion

Lupinus havardii is known from the trans-Pecos region of Texas.

(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. 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
Name authority S. Watson: Proc. Amer. Acad. Arts 17: 369. (1882) — (as havardi)
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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