Ivesia baileyi

Plants green, ± tufted, often forming hanging clumps, sometimes rosetted. Stems pendent or prostrate to ascending, 0.5–2(–2.5) dm. Basal leaves planar, 3–12(–18) cm; sheathing base not or sparsely strigose abaxially; petiole 1–8 cm; lateral leaflets 2–6(–10) per side, separate to slightly overlapping distally, ovate or obovate to flabellate, 4–15(–25) mm, incised 1/4–3/4 to base into 3–11(–15) ovate to oblanceolate teeth or lobes, apex not setose, surfaces ± sparsely short-pilose or hirsute, ± glandular; terminal leaflets ± distinct. Cauline leaves 1–2; blade reduced. Inflorescences (1–)5–40-flowered, open, (1–)1.5–8(–10) cm diam. Pedicels 2–15(–30) mm. Flowers 4–10 mm diam.; epicalyx bractlets 5, narrowly lanceolate to ovate, 0.8–2.5 mm; hypanthium patelliform, 0.5–2 × 2–4 mm; sepals (1.2–)1.5–4 mm, acute; petals white or pale yellow, oblanceolate to narrowly spatulate, 1.5–2.5 mm; stamens 5, filaments 0.5–1.1 mm, anthers yellow, sometimes with reddish margins, oblong, 0.4–0.7 mm; carpels (1–)3–8, styles 0.9–1.8 mm. Achenes greenish white to light tan, 1.5–2 mm, smooth or rugose, ± carunculate.

Distribution

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• Legacy Map

w United States.

Discussion

Varieties 2 (2 in the flora).

The two varieties accepted here were not recognized by D. D. Keck (1938), who instead treated Ivesia setosa as a variety of I. baileyi. Field investigations confirm that the three entities are reasonably distinct morphologically, with intergradation where their otherwise distinct ranges overlap in central Nevada.

Selected References

None.

Lower Taxa

Ivesia baileyi var. baileyi, Ivesia baileyi var. beneolens

Key

1	Petals pale yellow; hypanthium interior yellow to golden; epicalyx bractlets ± 3/4 to as long as sepals; achenes smooth.	Ivesia baileyi var. baileyi
1	Petals white; hypanthium interior pale green or cream to maroon; epicalyx bractlets usually less than 1/2 as long as sepals; achenes rugose.	Ivesia baileyi var. beneolens