Ivesia argyrocoma
Ivesia multifoliolata
silver-hair ivesia, silverhair mousetail
Coconino ivesia, manyleaf mousetail, red comarella
ascending to erect, 2–6 dm.
6–25(–30) cm; sheathing base minutely glandular abaxially;
petiole 0.5–8(–10) cm;
leaflets 12–30 per side, obovate to broadly cuneate, 5–12(–15) mm, incised 1/3–1/2 to base into 3–5 oblong to ovate teeth, sometimes entire, sparsely short-strigose to -villous, sometimes glabrate.
(5–)8–60-flowered, 2–12 cm diam.
5–30(–35) mm.
9–12 mm diam.;
epicalyx bractlets narrowly lanceolate to lanceolate, 1–2 mm;
hypanthium interior brick- to blood-red or golden, 0.5–1.5 × 3–5 mm;
sepals 3–4.5 mm, base brick- to blood-red adaxially, apex acute to acuminate;
petals brick- to blood-red, linear to oblanceolate or narrowly elliptic, 2–3.5 mm;
stamens 5, filaments 1.3–2 mm, anthers maroon, oblong, 0.6–0.9 mm;
carpels 1–5, styles 2–3 mm.
brown, 2–2.5 mm.
= 28.
Ivesia argyrocoma
Ivesia multifoliolata
Varieties 2 (1 in the flora).
Plants from the central Sierra San Pedro Mártir in northern Baja California belong to var. moranii Ertter & Reveal, which may be distinguished by its compact stature (to 0.5 dm), densely villous basal stipules 2–4 mm, decumbent stems 2–7 cm that are stipitate-glandular under the villous indumentum, and solitary, loosely congested cyme. The petals are oblanceolate to narrowly obovate and 2.5–3.5 mm. The grayish, faintly mottled achenes are 1.3–2 mm.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Of conservation concern.
Ivesia multifoliolata is found between the Grand Canyon and Mogollon Rim in northern Arizona. It is both the only species of the genus with red petals and the only one that overlaps the range of the red-petaled Potentilla sect. Rubrae.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CalFlora
WildflowerSearch
iNaturalist
USDA Plants Database
