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chamise horkelia, Parry horkelia, Parry's horkelia

White Mountain horkelia, White Mountains. horkelia

Habit Plants forming open mats. Plants 0.7–3 dm diam.
Stems

ascending to erect, 1–3(–3.5) dm.

ascending to erect, 1–2.5 dm.

Basal leaves

4–10(–12) × 1–2 cm;

leaflets 3–6(or 7) per side, narrowly obovate, 5–12(–15) × 4–8(–10) mm, 1/2–3/4 as wide as long, divided ± 1/4 to midrib into 5–10 oblong to broadly obovate teeth, sparsely pilose especially on midveins and margins.

3–10 × 0.4–0.8 cm;

leaflets (6–)10–14 per side, ± overlapping at least distally, cuneate to flabellate, 2.5–4(–6) mm, divided 3/4+ to midrib into 3–6 oblanceolate to obovate lobes, hispid.

Cauline leaves

1–4.

3–7.

Pedicels

(3–)5–15 mm.

2–8(–12) mm.

Flowers

15 mm diam.;

epicalyx bractlets linear-lanceolate to narrowly elliptic, 2–5 × 0.5–1.5 mm, ± 2/3 length of sepals;

hypanthium 0.6–1 × 2.5–4 mm, less than 1/3 as deep as wide;

sepals ± spreading to reflexed, lanceolate to narrowly elliptic, 3.5–6 mm;

petals elliptic to obovate, 4–7 × 3 mm, apex obtuse to rounded to truncate or slightly emarginate;

filaments 1–3 × 0.6–1.3 mm, anthers 0.6–1 mm;

carpels (17–)20–50;

styles 1.5–2.5 mm.

3–15, 10 mm diam.;

epicalyx bractlets linear to lanceolate, 1.5–3 × 0.2–0.5 mm, ± 2/3 length of sepals;

hypanthium 1.8–3 × 3–4 mm, ± 1/2 as deep as wide, interior sparsely pilose;

sepals reflexed, broadly lanceolate, 2.5–4(–5) mm, hairs stiff, 0.5 mm;

petals not pink-tinged, oblanceolate to oblong or narrowly elliptic, 2.5–5 mm, apex rounded to truncate, sometimes slightly emarginate or mucronate;

filaments white, 0.5–2 × 0.4–0.6 mm, glabrous or sparsely pilose adaxially, anthers 0.5–0.9 mm;

carpels (10–)12–18(–20);

styles 1.8–2.2 mm.

Achenes

grayish, 1.3–1.5 mm, finely reticulate.

brown to dark brown, 1.5–2 mm.

2n

= 28.

Horkelia parryi

Horkelia hispidula

Phenology Flowering late spring–early summer. Flowering summer.
Habitat Chaparral, pine-oak woodlands, primarily on Ione Formation, rarely on schist or limestone Dry, rocky alpine flats, in subalpine conifer woodlands
Elevation 80–900 m (300–3000 ft) 3000–3400 m (9800–11200 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; NV
[BONAP county map]
Discussion

Of conservation concern.

Horkelia parryi is known from the foothills of the western Sierra Nevada in Amador, Calaveras, and El Dorado counties, and is disjunct in Mariposa County.

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

Of conservation concern.

When describing Horkelia hispidula, Rydberg associated it with H. sericata in his group Sericatae. The species is known only from the White Mountains of California and adjacent Nevada.

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

Source FNA vol. 9, p. 258. FNA vol. 9, p. 249.
Parent taxa Rosaceae > subfam. Rosoideae > tribe Potentilleae > Horkelia > sect. Parryae Rosaceae > subfam. Rosoideae > tribe Potentilleae > Horkelia > sect. Hispidulae
Sibling taxa
H. bolanderi, H. californica, H. clevelandii, H. congesta, H. cuneata, H. daucifolia, H. fusca, H. hendersonii, H. hispidula, H. howellii, H. marinensis, H. rydbergii, H. sericata, H. tenuiloba, H. tridentata, H. truncata, H. tularensis, H. wilderae, H. yadonii
H. bolanderi, H. californica, H. clevelandii, H. congesta, H. cuneata, H. daucifolia, H. fusca, H. hendersonii, H. howellii, H. marinensis, H. parryi, H. rydbergii, H. sericata, H. tenuiloba, H. tridentata, H. truncata, H. tularensis, H. wilderae, H. yadonii
Synonyms Potentilla parryi Potentilla hispidula
Name authority Greene: Bull. Calif. Acad. Sci. 2: 416. (1887) Rydberg: in N. L. Britton et al., N. Amer. Fl. 22: 278. (1908)
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