Lupinus argenteus var. holosericeus |
Lupinus argenteus var. hillii |
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holo lupine, little-flower lupine, silky lupine |
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Habit | Herbs 2–7 dm, densely silky throughout, hairs forwardly appressed. | Herbs to 3 dm, hairs inconspicuous and forwardly appressed to spreading. |
Stems | branched or unbranched. |
branched. |
Leaves | usually cauline, basal leaves usually absent at flowering, if present then petioles less than 3 times as long as leaflets; leaflet blades narrow and folded, oblanceolate or elliptic-oblanceolate, surfaces densely silky. |
usually cauline, basal leaves usually absent at flowering, if present then petioles less than 3 times as long as leaflets; leaflet blades narrow and folded, oblanceolate or elliptic-oblanceolate, surfaces gray or silvery-pubescent. |
Pedicels | (1–)2–5(–6) mm. |
(1–)2–5(–6) mm. |
Flowers | 5–9 mm; calyx bulge 0–1 mm; corolla purplish blue, wings 5–7.5 mm, banner densely hairy abaxially, to middle or distally. |
6–8 mm; calyx bulge 0–1 mm; corolla blue-purple, wings 5.5–7 mm, banner equaling wings, usually thinly strigulose abaxially. |
2n | = 48. |
= 48. |
Lupinus argenteus var. holosericeus |
Lupinus argenteus var. hillii |
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Phenology | Flowering Jun–Aug. | Flowering Jun–Sep. |
Habitat | Dry, open places, sagebrush plains, low hills in the intermountain region, slopes and ridges of the Rocky Mountains. | Ponderosa pine forest, upper edge of pinyon-juniper woodlands. |
Elevation | 1500–3500 m. (4900–11500 ft.) | 2000–2800 m. (6600–9200 ft.) |
Distribution |
CO; ID; NV; OR; UT |
AZ; CO; NM; NV; UT |
Discussion | Variety holosericeus is known from the Ruby Mountains of northeastern Nevada through the middle and lower Snake River plains and Owyhee Desert in southern Idaho and adjacent Oregon, northern Nevada, western Colorado, and northeastern Utah. This variety is close to var. utahensis, but the flowers are smaller, and the calyx is not spurred. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variety hillii is the small-flowered form that occurs in the Southwest in which the flowers are budlike and scarcely gaping. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | L. holosericeus, L. evermannii, L. stockii, L. summae | L. hillii, L. hillii var. osterhoutianus, L. ingratus var. arizonicus, L. marcusianus, L. osterhoutianus |
Name authority | (Nuttall) Barneby in A. Cronquist et al.: Intermount. Fl. 3(B): 245. (1989) | (Greene) Barneby in A. Cronquist et al.: Intermount. Fl. 3(B): 246. (1989) |
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