Ivesia callida

(H. M. Hall) Rydberg in N. L. Britton et al.

in N. L. Britton et al., N. Amer. Fl. 22: 286. 1908.

Common names: Tahquitz ivesia
Conservation concernEndemic
Basionym: Potentilla callida H. M. Hall Univ. Calif. Publ. Bot. 1: 86. 1902
Treatment appears in FNA Volume 9. Treatment on page 224. Mentioned on page 223.

Plants green, ± tufted to matted, often forming hanging clumps, sometimes rosetted. Stems usually pendent or prostrate to ascending, sometimes nearly erect, 0.2–1.5 dm. Basal leaves ± loosely cylindric to weakly planar, 1–7 cm; sheathing base sparsely strigose abaxially; petiole 0.3–3 cm; lateral leaflets (1–) 5–8 per side, slightly overlapping, elliptic to flabellate, 2–6 (–7) mm, incised nearly to base into (0–) 2–4 oblanceolate to elliptic lobes, apex sometimes ± setose, surfaces loosely long-strigose, sparsely glandular; terminal leaflets indistinct. Cauline leaves (1–) 2; blade reduced. Inflorescences 1–10 (–15) -flowered, open, (0.5–) 2–5 cm diam. Pedicels 5–15 mm. Flowers 7–10 mm diam.; epicalyx bractlets 5, narrowly lanceolate, 1.5–3 mm; hypanthium patelliform, 0.5–1 × 2–3 mm; sepals 2–3.5 mm, acute; petals white, obovate, 2–3.5 mm; stamens 20, filaments 1.5–3 mm, anthers maroon, subrotund, 0.2–0.3 mm; carpels 4–8, styles 1.5–1.8 mm. Achenes greenish white to light tan, 1.5 mm, smooth to lightly rugose, ± carunculate.


Phenology: Flowering summer.
Habitat: Crevices of dry, rocky outcrops of granite, sometimes more or less vertical protected cliffs, in montane conifer woodlands
Elevation: 2400–2500 m

Discussion

Of conservation concern.

Ivesia callida occurs in the Tahquitz Peak area of the San Jacinto Wilderness Area, San Jacinto Mountains, Riverside County, where two populations are known (K. Berg 1983). Plants form tight mats in horizontal crevices and loose pendent clumps on vertical rock faces.

Selected References

None.

Lower Taxa

None.

"dm" is not declared as a valid unit of measurement for this property.

... more about "Ivesia callida"
greenish white +  and light tan +
smooth +  and lightly rugose +
shorter than wide +  and longer +
subrotund +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
Barbara Ertter +  and James L. Reveal +
(H. M. Hall) Rydberg in N. L. Britton et al. +
compound +  and simple +
opposite +  and alternate +
1 cm10 mm <br />0.01 m <br /> (7 cm70 mm <br />0.07 m <br />) +
Potentilla callida +
20 cm200 mm <br />0.2 m <br /> (25 cm250 mm <br />0.25 m <br />) +
narrowly oblong +  and filiform planar +
reduced +
0.5 cm5 mm <br />0.005 m <br /> (20 cm200 mm <br />0.2 m <br />) +
reduced +
elongate +
free +  and distinct +
branched +  and simple +
Tahquitz ivesia +
not +  and aggregated +
2400–2500 m +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
unisexual +  and bisexual +
not +  and aggregated +
deciduous +
obliquely ovoid +  and reniform +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
loose +  and capitate +
Crevices of dry, rocky outcrops of granite, sometimes more or less vertical protected cliffs, in montane conifer woodlands +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
open +  and 1-10(-15)-flowered +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
crassinucellate +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
opposite +  and alternate +
winter-marcescent +
deciduous +  and persistent +
separate +  and overlapping +
, +  and distinct +
distinguishable +
lobed +  and toothed +
oblanceolate +  and elliptic +
verticillate +
toothed +, unlobed +  and lobed +
inferior +  and superior +
clustered +, biseriate +  and superposed +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0 (?) +  and 4 (?) +
free +  and distinct +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Flowering summer. +
adnate +, free +, connate +  and distinct +
in N. L. Britton et al., N. Amer. Fl. +
not arillate +
persistent +
free +  and distinct +
erect +  and spreading +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
Conservation concern +  and Endemic +
free +  and distinct +
branched +  and simple +
reddish +, grayish +  and green +
erect +, prostrate +  and ascending +
2 +  and 20 +
palmate +  and pinnate +
deciduous +
distinct +
subterminal +
filiform +
rough-thickened +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
long-strigose +
Saxosae +, Ivesia sect. Saxosae +, Potentilla sect. Saxosae +, Potentilla subg. Purpusia +  and Undefined sect. Purpusia +
not fusiform +
Ivesia callida +
Ivesia sect. Setosae +
species +
inconspicuous +
stipelike +, elongate +, less flat +  and conic or turbinate +
enlarged +
plant +  and matted +
glabrate +  and sparsely densely glandular-puberulent +