FNA: Lupinus lepidus var. ramosus vs. Lupinus lepidus

Phenology

Flowering Jul–Aug.

Habitat

Open stony crests, gravelly hillsides, subalpine.

Elevation

2300–4000 m. (7500–13100 ft.)

Distribution

CA

w North America

[WildflowerSearch map]

[BONAP county map]

Discussion

Variety ramosus is known from the central and southern Sierra Nevada and in the Sweetwater and White mountains.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Varieties 10 (10 in the flora).

Dwarf perennial lupines are usually characterized by a cespitose habit, persistent inflorescence bracts, banners that are glabrous abaxially, and ciliate keel petals. The history of the taxonomy of this group was discussed in detail by B. J. Cox (1972), R. C. Barneby (1989), and K. A. Weitemier (2010). Barneby gave justification for his conservative treatment of this taxon, which is generally followed here. Genetic analysis in lupines has shown little separation, according to Weitemier, but he suggested that there is good evidence to retain these variations as varieties, following Barneby, rather than elevating them to species level.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key

1. Racemes not exceeding leaves, or only partially so.	→ 2
2. Banner recurved, reflexed, 3+ mm wide.	var. aridus
2. Banner not or scarcely recurved, overhanging wings, 2.5–3 mm wide.	→ 3
3. Stems present and branched; leaves basal and cauline; racemes loose; pedicels 2.5–.	var. cusickii
3. Stems very short or absent, densely tufted; leaves basal; racemes dense; pedicels 0.4–.	→ 1
1. 5 mm.	var. utahensis
1. Racemes entirely exserted beyond leaves.	→ 4
4. Leaves clustered near base (appearing ± basal); herbs appearing acaulescent or shortly caulescent.	→ 5
5. Flowers 9–12 mm; leaflet blades 10–20 mm; rare, only from Mt. Ashland, Oregon.	L. lepidus var ashlandensis
5. Flowers 6–9(–10) mm; leaflet blades 5–30 mm; British Columbia southward to California, eastward to Idaho, Nevada.	→ 6
6. Racemes ± dense, 2–8 cm; herbs to 1 dm; leaflet blades 5–10 mm; elevation (1600–)2000–3500 m.	var. lobbii
6. Racemes elongate, (2–)4.5–11(–15) cm; herbs 1.2–3.5 dm; leaflet blades 10–30 mm; elevation 1000–2500 m.	var. sellulus
4. Leaves usually spread along stems or at least with some tufts of cauline leaves; herbs usually strongly caulescent (except stems short or absent in var. culbertsonii).	→ 7
7. Flowers 10–14 mm; Alberta, British Columbia, Alaska, Oregon, Washington.	var. lepidus
7. Flowers 7–11.5(–12) mm; California, Nevada.	→ 8
8. Racemes dense, (5–)12–30 cm; flowers in 9–12 whorls, dense; leaves cauline; elevation (300–)1500–2500(–3200 m).	var. confertus
8. Racemes usually open, 2–10(–12) cm; flowers in (2 or)3–7 whorls, ± well spaced; leaves basal and cauline; elevation 1900–4000 m.	→ 9
9. Leaflet blades usually 10–30 mm; flowers (9–)10–11.5 mm; elevation 1900–3600 m.	var. culbertsonii
9. Leaflet blades usually 5–15(–30) mm; flowers usually 7–9(–12) mm; elevation 2300–4000 m.	var. ramosus