Flora of North America species comparison

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Ivesia paniculata

Ivesia patellifera

Ash Creek ivesia, Ash Creek mousetail

Kingston Mountain mousetail, Kingston Mountains. ivesia
Habit Plants grayish, ± matted. Plants green, ± tufted, often forming hanging clumps, sometimes rosetted.
Stems

± prostrate, 0.4–1.5(–2) dm.

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

tightly cylindric, (1.5–)2–5(–7) cm; sheathing base densely hairy abaxially;

petiole 0.5–4 cm;

lateral leaflets (5–)8–15 per side, overlapping at least distally, ± flabellate, 0.5–2 mm, incised to base or nearly so into (0–)3–8(–15) elliptic to narrowly obovate lobes, apex not or obscurely setose, surfaces densely hirsute, cryptically glandular;

terminal leaflets indistinct.

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–)1;

blade reduced.

(0–)2;

blade well developed.
Inflorescences

20–200-flowered, congested, (1–)1.5–6(–10) cm diam.

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

1.5–6 mm.

5–20(–30) mm.
Flowers

4–6 mm diam.;

epicalyx bractlets 5, lanceolate to elliptic, 0.6–1.5(–2) mm;

hypanthium shallowly cupulate, 1 × 2–3 mm;

sepals (1–)1.5–2.5(–3) mm, acute;

petals white to pale yellowish, linear, 1 mm;

stamens 5, filaments 0.3–1 mm, anthers yellow with maroon margins, ovate, 0.3–0.5 mm;

carpels 1–2(–3), styles 0.7–1.8 mm.

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

brown, 0.8–1.5 mm, smooth, prominently carunculate.

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

Ivesia paniculata

Ivesia patellifera
Phenology Flowering summer. Flowering summer.
Habitat Dry shallow volcanic ash and cinders atop volcanic bedrock, open sagebrush communities, adjacent conifer woodlands Dry, rocky outcrops of limestone, usually crevices of more or less vertical protected cliffs or boulders, in conifer woodlands
Elevation 1500–1800 m (4900–5900 ft) 1400–2200 m (4600–7200 ft)
Distribution
from FNA
CA
[BONAP county map]
from FNA
CA
[BONAP county map]
Discussion

Of conservation concern.

Ivesia paniculata is known only from the Ash Valley area of Lassen County. The distinctions between I. paniculata and I. rhypara are perhaps on the same scale as variation among disjunct population clusters of I. rhypara, but no taxonomic adjustments are proposed at this time.

(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. 229. FNA vol. 9, p. 224.
Parent taxa Rosaceae > subfam. Rosoideae > tribe Potentilleae > Ivesia > sect. Setosae Rosaceae > subfam. Rosoideae > tribe Potentilleae > Ivesia > sect. Setosae
Sibling taxa
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. 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
Synonyms Potentilla patellifera
Name authority T. W. Nelson & J. P. Nelson: Brittonia 33: 165, fig. 1. (1981) (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).



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