Lupinus brevicaulis |
Lupinus subcarnosus |
|
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sand lupine, short stem blue lupine, short-stem lupine |
Texas bluebonnet |
|
Habit | Herbs, annual, usually less than 1 dm, pubescent, hairs more than 1 mm. | Herbs, annual, 1.5–4 dm, pubescent, hairs appressed or ascending. |
Stems | very short, tufted, branched. |
ascending or erect, branched. |
Leaves | cauline, crowded near base; stipules well developed; petiole 1–6 cm; leaflets (3 or)5–9, blades 8–20 × 2–9 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 | dense, 3–16-flowered, 1–8 cm; flowers spirally arranged, crowded. |
6–12 cm; flowers crowded or spaced, spirally arranged, crowded on young growth. |
Peduncles | 1–8(–10) cm; bracts persistent, straight, 2–3 mm. |
3–8 cm; bracts deciduous, 2.5–3 mm. |
Pedicels | 0.3–1.5 mm. |
3–7 mm. |
Flowers | 6–8 mm; calyx abaxial lobe entire or shallowly cleft, ± 6 mm, adaxial lobe 2-toothed, 3 mm, less than 1/2 as long as abaxial; corolla bright blue, banner spot white or yellow, keel glabrous. |
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 | not undulate, 1 cm, thinly pilose to coarsely hirsute. |
2.5–3.5 cm, yellowish gray- or brown-villous. |
Cotyledons | persistent, disclike, sessile. |
usually persistent, petiolate. |
Seeds | 1 or 2, smooth. |
4 or 5. |
2n | = 36. |
|
Lupinus brevicaulis |
Lupinus subcarnosus |
|
Phenology | Flowering spring. | Flowering spring. |
Habitat | Sandy washes, open areas, grasslands, pinyon pine-juniper forests, creosote bush scrub, mesquite. | Sandy soils, roadsides, open woodlands, coastal plains. |
Elevation | 300–2400 m. (1000–7900 ft.) | 0–300 m. (0–1000 ft.) |
Distribution |
AZ; CA; CO; NM; NV; OR; UT; WY; Mexico (Chihuahua, Sonora)
|
TX; Mexico (Coahuila, Nuevo Léon) |
Discussion | Lupinus brevicaulis resembles L. flavoculatus except that its flowers are smaller. (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.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Name authority | S. Watson: Botany (Fortieth Parallel), 53, plate 7, figs. 1–4. (1871) | Hooker: Bot. Mag. 63: plate 3467. (1836) |
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