Overview

Distribution

Lupinus texensis Hook.:
United States (North America)
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Lupinus leonensis S. Watson:
Mexico (Mesoamerica)
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National Distribution

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Physical Description

Morphology

Physical Description

Annual, Herbs, Taproot present, Nodules present, Stems erect or ascending, Stems or branches arching, spreading or decumbent, Stems less than 1 m tall, Stems solid, Stems or young twigs sparsel y to densely hairy, Leaves alternate, Leaves petiolate, Stipules conspicuous, Stipules setiform, subulate or acicular, Stipules persistent, Stipules adnate to petiole, Leaves compound, Leaves palmately 5-11 foliate, Leaf or leaflet margins entire, Leaflets 5-9, Leaves glabrous or nearly so, Leaves hairy on one or both surfaces, Inflorescences racemes, Inflorescence terminal, Bracts conspicuously present, Bracts very small, absent or caducous, Bracteoles present, Flowers zygomorphic, Calyx 5-lobed, Calyx 2-lipped or 2-lobed, Calyx hairy, Petals separate, Corolla papilionaceous, Petals clawed, Petals blue, lavander to purple, or violet, Banner petal narrow or oblanceolate, Wing petals narrow, oblanceolate to oblong, Wing tips obtuse or rounded, Keel petals auriculate, spurred, or gibbous, Stamens 9-10, Stamens or anthers dimorphic, alternating large and small, Stamens monadelphous, united below, Filaments glabrous, Style terete, Fruit a legume, Fruit unilocular, Fruit freely dehiscent, Fruit elongate, straight, Fruit oblong or ellipsoidal, Fruit exserted from calyx, Fruit internally septate between the seeds, Fruit hairy, Fruit 3-10 seeded, Seeds ovoid to rounded in outline, Seed surface smooth, Seeds olive, brown, or black, Seed surface mottled or patchy.
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Dr. David Bogler

Source: USDA NRCS PLANTS Database

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Type Information

Type collection for Lupinus leonensis S. Watson
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): E. Palmer
Year Collected: 1880
Locality: Nuevo León, Mexico, North America
  • Type collection: Watson, S. 1882. Proc. Amer. Acad. Arts. 17: 338.
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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

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Wikipedia

Lupinus texensis

Lupinus texensis (common name Texas Bluebonnet) is a species of lupine which is endemic to Texas. With other related species of lupines also called bluebonnets, it is the state flower of Texas.[1]

It is a biennial plant which begins its life as a small gravel-like seed. The seed has a hard seed coat that must be penetrated by wind, rain and weather over the course of a few months (but sometimes several years). In the fall the bluebonnets emerge as small seedings with two cotyledons, and later a rosette of leaves that are palmately compound with 5-7 leaflets 3-6 cm long, green with a faint white edge and hair. Growth continues over the mild winter months and then in the spring will take off and rapidly grow larger before sending up a 20-40 cm tall plume of blue flowers (with bits of white and occasionally a tinge of pinkish-red).

It has been found in the wild with isolated mutations in other colors, most notably all-white flowers, pink, and maroon. These mutations have since been selectively bred to produce different color strains that are available commercially.

Texas Bluebonnets in bloom
A field of Texas Bluebonnets

References

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