Ivesia pityocharis

Ertter

Syst. Bot. 14: 241, fig. 6. 1989.

Common names: Pine Nut Mountains ivesia
Conservation concernEndemic
Treatment appears in FNA Volume 9. Treatment on page 241. Mentioned on page 237, 238.

Plants grayish green to silvery, sometimes reddish tinged; glands sparse. Stems prostrate-decumbent to ascending, 0.5–2 (–3) dm. Basal leaves 6–12 (–15) cm; sheathing base weakly strigose abaxially; stipules absent; petiole (1–) 1.5–2.5 (–3) cm, hairs abundant, ascending to spreading, 1–4 mm; leaflets 15–25 per side, loosely overlapping, (1.5–) 2–7 mm, lobes 0–4 (–6), lanceolate or oblanceolate to elliptic, hairs abundant, spreading to ascending, 1–3 mm. Cauline leaves 2–5. Inflorescences (7–) 15–50-flowered, 2–8 cm diam., flowers arranged individually and/or in several to many loose few-flowered glomerules. Pedicels (3–) 6–15 (–22) mm. Flowers 8–13 mm diam.; epicalyx bractlets lanceolate to elliptic, 2–3 mm; hypanthium patelliform to shallowly cupulate, 1.5–2.5 × 3–4.5 mm, ± 1/2 as deep as wide; sepals often purple-suffused, 2.3–4 (–5) mm, acute; petals white, broadly spatulate or obovate to orbiculate, (2.8–) 3–5 (–6) mm; stamens 20, filaments filiform, (1–) 1.5–3 mm, anthers light pink, 0.3–0.5 mm; carpels 8–20, styles 2.2–3 mm. Achenes light-brown, 1.2–1.3 mm.


Phenology: Flowering summer.
Habitat: Vernally saturated meadows, in sagebrush communities
Elevation: 2100–2700 m

Discussion

Of conservation concern.

Ivesia pityocharis is known only from the Pine Nut Mountains, Douglas County. Plants are somewhat intermediate between those of I. kingii and I. sericoleuca in having relatively shallow hypanthia and loosely sericeous vestiture. Hairs on petioles and stem bases of I. pityocharis are to 4 mm; those of I. kingii are 1 mm and generally appressed-ascending.

Selected References

None.

Lower Taxa

None.

No values specified."dm" is not declared as a valid unit of measurement for this property.

... more about "Ivesia pityocharis"
not carunculate +
light-brown +
1.2mm +  and 1.3mm +
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 +
Ertter +
compound +  and simple +
opposite +  and alternate +
12 cm120 mm <br />0.12 m <br /> (15 cm150 mm <br />0.15 m <br />) +
6 cm60 mm <br />0.06 m <br /> (12 cm120 mm <br />0.12 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 +
Pine Nut Mountains ivesia +
not +  and aggregated +
2100–2700 m +
lanceolate +  and elliptic +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.3 cm13 mm <br />0.013 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 />) +
several +  and many +
Vernally saturated meadows, in sagebrush communities +
spreading +  and ascending +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 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 />) +
(7-)15-50-flowered +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
crassinucellate +
opposite +  and alternate +
winter-marcescent +
deciduous +  and persistent +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
, +  and distinct +
not +  and distinguishable +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
oblanceolate +  and elliptic +
verticillate +
toothed +, unlobed +  and lobed +
inferior +  and superior +
clustered +, biseriate +  and superposed +
1.5 cm15 mm <br />0.015 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0 (?) +  and 4 (?) +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
free +  and distinct +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (3 cm30 mm <br />0.03 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Flowering summer. +
adnate +, free +, connate +  and distinct +
not arillate +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
purple-suffused +
persistent +
free +  and distinct +
erect +  and spreading +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Conservation concern +  and Endemic +
free +  and distinct +
branched +  and simple +
reddish +, grayish +  and green +
prostrate-decumbent +  and ascending +
2 +  and 20 +
palmate +  and pinnate +
deciduous +
distinct +
subterminal +
filiform +
rough-thickened +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Eremicae +, Ivesia sect. Eremicae +  and Unguiculatae +
Ivesia pityocharis +
Ivesia sect. Unguiculatae +
species +
glabrate +  and hairy +
inconspicuous +
stipelike +, elongate +, less flat +  and conic or turbinate +
enlarged +
tufted +  and rosetted +
reddish tinged +, grayish green +  and silvery +
glabrate +  and sparsely densely glandular-puberulent +