Flora of North America species comparison

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Lupinus argenteus var. holosericeus

Lupinus argenteus var. heteranthus
Photo is of parent taxon

holo lupine, little-flower lupine, silky lupine
Photo is of parent taxon

Kellogg's spur lupine, silvery lupine, tailcup lupine
Habit Herbs 2–7 dm, densely silky throughout, hairs forwardly appressed. Herbs 2–8 dm, densely silky throughout.
Stems

branched or unbranched.

branched or unbranched.
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.

basal, sometimes also cauline;

leaflet blade surfaces densely silver-silky.
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.

8–14 mm, in profile appearing open;

calyx spur 1–2 mm (pronounced);

corolla violet or blue to white, banner silky abaxially, wings glabrous.
2n

= 48.

= 48.

Lupinus argenteus var. holosericeus

Lupinus argenteus var. heteranthus
Phenology Flowering Jun–Aug. Flowering May–Sep.
Habitat Dry, open places, sagebrush plains, low hills in the intermountain region, slopes and ridges of the Rocky Mountains. Dry, open slopes, sagebrush scrub, pinyon-juniper woodlands.
Elevation 1500–3500 m. (4900–11500 ft.) 1000–3000 m. (3300–9800 ft.)
Distribution
from FNA
CO; ID; NV; OR; UT
from FNA
CA; ID; NV; OR
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 heteranthus ranges from the Cascades in Oregon southward through the Sierra Nevada and eastward to Mono County, and disjunctly in the San Gabriel Mountains, in California, and is widespread over the western one-fourth of the intermountain region from Steens Mountain and eastern Lake County in Oregon eastward to Humboldt, Pershing, and Nye counties in Nevada. It grades in the northeast into var. utahensis and in the southeast into var. palmeri and var. argenteus in Idaho.

Variety heteranthus differs from var. utahensis by the more pronounced calyx spur and the more widely gaping flowers.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11. FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Lupinus > Lupinus argenteus Fabaceae > subfam. Faboideae > Lupinus > Lupinus argenteus
Sibling taxa
L. argenteus var. argentatus, L. argenteus var. argenteus, L. argenteus var. argophyllus, L. argenteus var. fulvomaculatus, L. argenteus var. heteranthus, L. argenteus var. hillii, L. argenteus var. meionanthus, L. argenteus var. moabensis, L. argenteus var. montigenus, L. argenteus var. palmeri, L. argenteus var. parviflorus, L. argenteus var. rubricaulis, L. argenteus var. utahensis
L. argenteus var. argentatus, L. argenteus var. argenteus, L. argenteus var. argophyllus, L. argenteus var. fulvomaculatus, L. argenteus var. hillii, L. argenteus var. holosericeus, L. argenteus var. meionanthus, L. argenteus var. moabensis, L. argenteus var. montigenus, L. argenteus var. palmeri, L. argenteus var. parviflorus, L. argenteus var. rubricaulis, L. argenteus var. utahensis
Synonyms L. holosericeus, L. evermannii, L. stockii, L. summae L. meionanthus var. heteranthus, L. argentinus, L. caudatus, L. caudatus subsp. cutleri, L. caudatus var. cutleri, L. cutleri, L. hendersonii, L. inyoensis, L. laxiflorus var. inyoensis, L. rosei
Name authority (Nuttall) Barneby in A. Cronquist et al.: Intermount. Fl. 3(B): 245. (1989) (S. Watson) Barneby in A. Cronquist et al.: Intermount. Fl. 3(B): 246. (1989)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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