Ivesia unguiculata

A. Gray

Proc. Amer. Acad. Arts 7: 339. 1868.

Common names: Yosemite ivesia
Conservation concernEndemic
Synonyms: Potentilla unguiculata (A. Gray) Hooker f.
Treatment appears in FNA Volume 9. Treatment on page 241. Mentioned on page 237, 238, 240, 242.

Plants ± grayish, often purple-tinged; glands sparse to abundant. Stems decumbent to ascending, 1–3.5 dm. Basal leaves (4–) 7–15 cm; sheathing base ± glabrous abaxially; stipules linear, 3–6 mm; petiole (0.3–) 0.5–4 (–5) cm, hairs sparse to abundant, ascending to spreading, 1–2 mm; leaflets 15–20 (–25) per side, loosely overlapping, 3–6 mm, lobes 3–8, linear to oblanceolate, hairs sparse to abundant, spreading, 1–2 mm. Cauline leaves 3–6. Inflorescences (15–) 30–100 (–200) -flowered, (1–) 1.5–4 (–8) cm diam., flowers mostly arranged in 1–several loose to tight glomerules of 5–10 flowers. Pedicels 1–3 mm. Flowers 6–9 mm diam.; epicalyx bractlets linear or narrowly lanceolate to elliptic or narrowly oblong, 1.2–2 (–3) mm; hypanthium shallowly turbinate, 1.5–2.5 × 2–3 (–3.5) mm, often nearly as deep as wide; sepals heavily purple-mottled, (1.5–) 2–3 (–3.5) mm, acute; petals white, often tinged with pink, oblanceolate to spatulate or obovate, 3–4 mm; stamens 10–15, filaments filiform, 0.6–1.1 mm, anthers maroon, 0.3–0.5 mm; carpels (1–) 3–9, styles 1.4–2 mm. Achenes light-brown, 1.2–1.5 mm.


Phenology: Flowering summer.
Habitat: Moist meadows and slopes, in montane conifer woodlands
Elevation: 1500–2500 m

Discussion

Of conservation concern.

Ivesia unguiculata is found in mid-elevation meadows of the central Sierra Nevada, mostly north of the Kings River. The distinctive deep red to purplish coloration of the inflorescence, and the plant in general, can make patches of this species conspicuous as a smoky purplish haze in meadows. The shape and color of the inflorescences are similar to those of the sympatric Horkelia fusca var. parviflora, suggesting shared pollinators.

The description and illustration by J. D. Hooker (1881), supposedly of Potentilla (Ivesia) unguiculata, were based actually on material grown from seed of I. sericoleuca due to initial confusion of the two species (W. H. Brewer et al. 1876–1880, vol. 1).

The type (Kellogg s.n., CAS) of Potentilla ciliata Greene (not Rafinesque) is unquestionably this species; however, the purported locality (Owens Valley, Inyo County) is dubious and most likely an error in the labeling of the specimen by the collector.

Selected References

None.

Lower Taxa

None.

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

... more about "Ivesia unguiculata"
not carunculate +
light-brown +
1.2mm +  and 1.5mm +
less as-long-as to longer than wide +  and more +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Barbara Ertter +  and James L. Reveal +
A. Gray +
compound +  and simple +
opposite +  and alternate +
4 cm40 mm <br />0.04 m <br /> (7 cm70 mm <br />0.07 m <br />) +
7 cm70 mm <br />0.07 m <br /> (15 cm150 mm <br />0.15 m <br />) +
Unguiculatae +
20 cm200 mm <br />0.2 m <br /> (25 cm250 mm <br />0.25 m <br />) +
narrowly oblong +  and filiform planar +
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 +
Yosemite ivesia +
not +  and aggregated +
1500–2500 m +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
narrowly lanceolate +  and elliptic or narrowly oblong +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
5 +  and 10 +
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 +
1 +  and several +
Moist meadows and slopes, in montane conifer woodlands +
spreading +  and ascending +
sparse +  and abundant +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 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 />) +
(15-)30-100(-200)-flowered +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
crassinucellate +
opposite +  and alternate +
winter-marcescent +
deciduous +  and persistent +
, +  and distinct +
not +  and distinguishable +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
linear +  and oblanceolate +
verticillate +
toothed +, unlobed +  and lobed +
inferior +  and superior +
clustered +, biseriate +  and superposed +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0 (?) +  and 4 (?) +
free +  and distinct +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering summer. +
adnate +, free +, connate +  and distinct +
Proc. Amer. Acad. Arts +
not arillate +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
purple-mottled +
persistent +
free +  and distinct +
erect +  and spreading +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Conservation concern +  and Endemic +
free +  and distinct +
branched +  and simple +
reddish +, grayish +  and green +
decumbent +  and ascending +
2 +  and 20 +
palmate +  and pinnate +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
deciduous +
distinct +
subterminal +
filiform +
rough-thickened +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Potentilla unguiculata +
Ivesia unguiculata +
Ivesia sect. Unguiculatae +
species +
glabrate +  and hairy +
inconspicuous +
stipelike +, elongate +, less flat +  and conic or turbinate +
enlarged +
tufted +  and rosetted +
purple-tinged +  and grayish +
glabrate +  and sparsely densely glandular-puberulent +