Flora of North America species comparison

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Ivesia aperta var. aperta
Photo is of parent taxon

Sierra Valley ivesia, Sierra Valley mousetail
Stems

ascending to erect.
Flowers

(20–)30–250, usually more than 10 per glomerule, 5–10 mm diam.;

hypanthium 2–3(–4) mm diam.;

petals oblanceolate, 2–3 mm, shorter than sepals;

filaments 1–1.5(–2) mm;

styles 2–3 mm.
2n

= 28.

Ivesia aperta var. aperta
Phenology Flowering summer.
Habitat Dry meadows, edges of seeps, slopes, and flats, on vernally saturated volcanic soil, in sagebrush and grass communities, conifer woodlands
Elevation 1300–2300 m (4300–7500 ft)
Distribution
from FNA
CA; NV
[BONAP county map]
Discussion

Of conservation concern.

Variety aperta is most abundant in Sierra Valley and its drainages in Plumas and Sierra counties, California, barely extending into Lassen County. Disjunct populations occur in the Carson Range in southern Washoe County and the Virginia Range of Storey County, Nevada.

The chromosome count given here is based on a collection originally identified as Ivesia sericoleuca (D. D. Keck & A. Gustafsson 4901).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 9, p. 241.
Parent taxa Rosaceae > subfam. Rosoideae > tribe Potentilleae > Ivesia > sect. Unguiculatae > Ivesia aperta
Sibling taxa
I. aperta var. canina
Name authority unknown
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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