FNA: Ivesia argyrocoma vs. Ivesia patellifera

	Ivesia argyrocoma	Ivesia patellifera
	silver-hair ivesia, silverhair mousetail	Kingston Mountain mousetail, Kingston Mountains. ivesia
Habit		Plants green, ± tufted, often forming hanging clumps, sometimes rosetted.
Stems		pendent or prostrate to ascending, (0.5–)1–2 dm.
Basal leaves		planar, (2–)5–15 cm; sheathing base not strigose abaxially; petiole 1–5 cm; lateral leaflets (1–)2–3(–4) per side, separate, obovate to orbiculate, 5–20 mm, incised 1/4–1/2 to base into 5–9 broadly ovate teeth, apex not setose, surfaces short-pilose, ± glandular; terminal leaflets distinct.
Cauline leaves		(0–)2; blade well developed.
Inflorescences		(1–)3–20(–35)-flowered, open, (0.5–)1.5–4(–6) cm diam.
Pedicels		5–20(–30) mm.
Flowers		7–10 cm diam.; epicalyx bractlets 0; hypanthium patelliform, 0.5(–1) × 2–3 mm; sepals 2–4 mm, broadly acute; petals yellow, narrowly oblanceolate, 2–3 mm; stamens 5–10, filaments 0.6–1.2(–1.5) mm, anthers yellow, oblong, 0.8–1 mm; carpels 4–10, styles 1.5–2 mm.
Achenes		greenish white to light tan, 1.5–2 mm, faintly rugose, ± carunculate.

	Ivesia argyrocoma	Ivesia patellifera
Phenology		Flowering summer.
Habitat		Dry, rocky outcrops of limestone, usually crevices of more or less vertical protected cliffs or boulders, in conifer woodlands
Elevation		1400–2200 m (4600–7200 ft)
Distribution	CA; nw Mexico [WildflowerSearch map] [BONAP county map]	CA [BONAP county map]
Discussion	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 patellifera is confined to crevices in steep wash and canyon walls in the Kingston Mountains of San Bernardino County. (Discussion copyrighted by Flora of North America; reprinted with permission.)
Source	FNA vol. 9, p. 242.	FNA vol. 9, p. 224.
Parent taxa	Rosaceae > subfam. Rosoideae > tribe Potentilleae > Ivesia > sect. Unguiculatae	Rosaceae > subfam. Rosoideae > tribe Potentilleae > Ivesia > sect. Setosae
Sibling taxa	I. aperta, I. arizonica, I. baileyi, I. callida, I. campestris, I. cryptocaulis, I. gordonii, I. jaegeri, I. kingii, I. longibracteata, I. lycopodioides, I. muirii, I. multifoliolata, I. paniculata, I. patellifera, I. pickeringii, I. pityocharis, I. pygmaea, I. rhypara, I. sabulosa, I. santolinoides, I. saxosa, I. sericoleuca, I. setosa, I. shockleyi, I. tweedyi, I. unguiculata, I. utahensis, I. webberi	I. aperta, I. argyrocoma, I. arizonica, I. baileyi, I. callida, I. campestris, I. cryptocaulis, I. gordonii, I. jaegeri, I. kingii, I. longibracteata, I. lycopodioides, I. muirii, I. multifoliolata, I. paniculata, I. pickeringii, I. pityocharis, I. pygmaea, I. rhypara, I. sabulosa, I. santolinoides, I. saxosa, I. sericoleuca, I. setosa, I. shockleyi, I. tweedyi, I. unguiculata, I. utahensis, I. webberi
Subordinate taxa	I. argyrocoma var. argyrocoma
Synonyms	Horkelia argyrocoma, Potentilla argyrocoma	Potentilla patellifera
Name authority	(Rydberg) Rydberg: in N. L. Britton et al., N. Amer. Fl. 22: 284. (1908)	(J. T. Howell) Ertter: Syst. Bot. 14: 232. (1989)
Web links	Local Web sites: CalFlora, CalPhotos WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: CA Local Web sites: CalFlora, CalPhotos WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Ivesia patellifera

silver-hair ivesia, silverhair mousetail

Kingston Mountain mousetail, Kingston Mountains. ivesia

Habit

Plants green, ± tufted, often forming hanging clumps, sometimes rosetted.

Stems

pendent or prostrate to ascending, (0.5–)1–2 dm.

Basal leaves

planar, (2–)5–15 cm; sheathing base not strigose abaxially;

petiole 1–5 cm;

lateral leaflets (1–)2–3(–4) per side, separate, obovate to orbiculate, 5–20 mm, incised 1/4–1/2 to base into 5–9 broadly ovate teeth, apex not setose, surfaces short-pilose, ± glandular;

terminal leaflets distinct.

Cauline leaves

(0–)2;

blade well developed.

Inflorescences

(1–)3–20(–35)-flowered, open, (0.5–)1.5–4(–6) cm diam.

Pedicels

5–20(–30) mm.

Flowers

7–10 cm diam.;

epicalyx bractlets 0;

hypanthium patelliform, 0.5(–1) × 2–3 mm;

sepals 2–4 mm, broadly acute;

petals yellow, narrowly oblanceolate, 2–3 mm;

stamens 5–10, filaments 0.6–1.2(–1.5) mm, anthers yellow, oblong, 0.8–1 mm;

carpels 4–10, styles 1.5–2 mm.

Achenes

greenish white to light tan, 1.5–2 mm, faintly rugose, ± carunculate.

Ivesia patellifera

Phenology

Flowering summer.

Habitat

Dry, rocky outcrops of limestone, usually crevices of more or less vertical protected cliffs or boulders, in conifer woodlands

Elevation

1400–2200 m (4600–7200 ft)

Distribution

CA; nw Mexico

[WildflowerSearch map]

[BONAP county map]

Discussion

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 patellifera is confined to crevices in steep wash and canyon walls in the Kingston Mountains of San Bernardino County.

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

Source

FNA vol. 9, p. 242.

FNA vol. 9, p. 224.

Parent taxa

Rosaceae > subfam. Rosoideae > tribe Potentilleae > Ivesia > sect. Unguiculatae

Rosaceae > subfam. Rosoideae > tribe Potentilleae > Ivesia > sect. Setosae

Sibling taxa

I. aperta, I. arizonica, I. baileyi, I. callida, I. campestris, I. cryptocaulis, I. gordonii, I. jaegeri, I. kingii, I. longibracteata, I. lycopodioides, I. muirii, I. multifoliolata, I. paniculata, I. patellifera, I. pickeringii, I. pityocharis, I. pygmaea, I. rhypara, I. sabulosa, I. santolinoides, I. saxosa, I. sericoleuca, I. setosa, I. shockleyi, I. tweedyi, I. unguiculata, I. utahensis, I. webberi

I. aperta, I. argyrocoma, I. arizonica, I. baileyi, I. callida, I. campestris, I. cryptocaulis, I. gordonii, I. jaegeri, I. kingii, I. longibracteata, I. lycopodioides, I. muirii, I. multifoliolata, I. paniculata, I. pickeringii, I. pityocharis, I. pygmaea, I. rhypara, I. sabulosa, I. santolinoides, I. saxosa, I. sericoleuca, I. setosa, I. shockleyi, I. tweedyi, I. unguiculata, I. utahensis, I. webberi

Subordinate taxa

I. argyrocoma var. argyrocoma

Synonyms

Horkelia argyrocoma, Potentilla argyrocoma

Potentilla patellifera

Name authority

(Rydberg) Rydberg: in N. L. Britton et al., N. Amer. Fl. 22: 284. (1908)

(J. T. Howell) Ertter: Syst. Bot. 14: 232. (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).

Choose a data source: Flora of North America

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Flora of North America species comparison

Ivesia argyrocoma

Ivesia patellifera

Ivesia argyrocoma

Ivesia patellifera