Lupinus hyacinthinus |
Lupinus albifrons |
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hyacinth lupine, San Jacinto lupine |
evergreen lupine, silver bush lupine, silver lupine, white-leaf bush lupine |
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Habit | Herbs, perennial, 4–10 dm, gray becoming green, sparsely hairy. | Subshrubs or shrubs, rarely perennial herbs, (1–)2–50 dm, usually silvery, sometimes greenish. | ||||||||||||||||||||||||||||
Stems | erect, unbranched or branched distally. |
decumbent to erect, clustered, branched or unbranched. |
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Leaves | cauline; stipules not leaflike, green to silvery, 5–16 mm; petiole 3–6 cm; leaflets 7–12, blades 30–80 × 4–8 mm, adaxial surface sparsely pubescent. |
cauline, clustered near base or not; stipules 6–20 mm; petiole 1–8(–12) cm; leaflets 6–10, blades 10–45 × 4–18 mm, surfaces hairy. |
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Racemes | 4–22 cm; flowers ± whorled. |
4–40 cm, rachis usually deciduous or semideciduous; flowers usually spirally arranged or loosely whorled. |
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Peduncles | 3–12 cm; bracts deciduous, 5–9 mm. |
5–13 cm; bracts deciduous, 4–24 mm. |
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Pedicels | 2–6 mm. |
3–10 mm. |
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Flowers | 13–16 mm; calyx bulge or spur 0–1 mm, abaxial lobe entire or 3-toothed, 7–11 mm, adaxial lobe 2-toothed, 6–10 mm; corolla light blue to purple, banner patch yellowish to white, banner glabrous abaxially, keel upcurved, glabrous, banner ovate, wings wide, covering keel tip. |
10–18 mm; calyx bulge or spur 0–1 mm, abaxial lobe entire or 3-toothed, 6–10 mm, adaxial lobe deeply divided, 6–8 mm; corolla violet to lavender, patch usually yellow, rarely white, turning purple, banner usually hairy abaxially, rarely glabrous, keel usually unlobed proximally, adaxial margin usually ciliate middle to tip, abaxial margins glabrous. |
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Legumes | 3–4 cm, silky. |
3–5 cm, hairy. |
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Cotyledons | deciduous, petiolate. |
deciduous, petiolate. |
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Seeds | 3–7, beige, speckled brown, 4–6 mm. |
4–9, mottled tan, 4–6 mm. |
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Lupinus hyacinthinus |
Lupinus albifrons |
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Phenology | Flowering Jun–Aug. | |||||||||||||||||||||||||||||
Habitat | Dry slopes, under yellow pines and white fir. | |||||||||||||||||||||||||||||
Elevation | 2000–3500 m. (6600–11500 ft.) | |||||||||||||||||||||||||||||
Distribution |
CA; Mexico (Baja California)
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w United States; n Mexico
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Discussion | Lupinus hyacinthinus is found in southern California in the San Gabriel, San Jacinto, and Santa Rosa mountains and on the Sierra San Pedro Mártir in Baja California. It is distinguished from its close relatives by its larger flowers in combination with green (versus gray or dull green) leaves. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 8 (8 in the flora). Lupinus albifrons is the most common shrubby lupine in western North America. The combination of silver-pubescent leaves, banners that are pubescent abaxially, and keels that are usually ciliate will separate it from the coastal L. arboreus and the dune loving L. chamissonis. The desert L. excubitus is separated by petiole length, raceme rachis persistence and size, elevation, and distribution. Some of the varieties (austromontanus, collinus, and medius) are woody at base but can appear herbaceous. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 11. | FNA vol. 11. | ||||||||||||||||||||||||||||
Parent taxa | ||||||||||||||||||||||||||||||
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Synonyms | L. albicaulis var. hyacinthinus, L. andersonii var. sublinearis, L. formosus var. hyacinthinus | |||||||||||||||||||||||||||||
Name authority | Greene: Leafl. Bot. Observ. Crit. 2: 85. (1910) | Bentham: Edwards’s Bot. Reg. 19: plate 1642. (1834) | ||||||||||||||||||||||||||||
Web links |