Lupinus hyacinthinus
Leafl. Bot. Observ. Crit. 2: 85. 1910.
Herbs, perennial, 4–10 dm, gray becoming green, sparsely hairy. Cotyledons deciduous, petiolate. Stems erect, unbranched or branched distally. 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. Peduncles 3–12 cm; bracts deciduous, 5–9 mm. Racemes 4–22 cm; flowers ± whorled. Pedicels 2–6 mm. 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. Legumes 3–4 cm, silky. Seeds 3–7, beige, speckled brown, 4–6 mm.
Phenology: Flowering Jun–Aug.
Habitat: Dry slopes, under yellow pines and white fir.
Elevation: 2000–3500 m.
Distribution
Calif., Mexico (Baja California).
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.
Selected References
None.