Horkelia tularensis

(J. T. Howell) Munz

Suppl. Calif. Fl., 110. 1968.

Common names: Kern Plateau horkelia
Conservation concernEndemic
Basionym: Potentilla tularensis J. T. Howell Leafl. W. Bot. 10: 254. 1966
Treatment appears in FNA Volume 9. Treatment on page 249. Mentioned on page 248.

Plants 1–4 dm diam. Stems decumbent to erect, 0.3–1.8 (–2.5) dm. Basal leaves 2–8 (–10) × 0.5–1.3 cm; leaflets 4–6 (–10) per side, overlapping, cuneate to flabellate, 3–8 mm, divided 3/4+ to midrib into (3–) 5–8 oblong to obovate or oblanceolate lobes, villous to pilose at least marginally or apically. Cauline leaves 1 or 2. Pedicels 2–7 mm. Flowers 3–15, 8–10 mm diam.; epicalyx bractlets linear-lanceolate, 1–2.5 (–3) × 0.3–0.5 (–0.8) mm, ± 2/3 length of sepals; hypanthium 1–1.5 × 2.5–4.5 mm, nearly 1/2 as deep as wide, interior sparsely pilose; sepals spreading to reflexed, broadly lanceolate, (2–) 3–4.5 (–5) mm, hairs stiff, 0.5–1 mm; petals not pink-tinged, narrowly oblanceolate to narrowly oblong, 2–4 mm, apex rounded to truncate, often slightly mucronate; filaments white, 1–2 × 0.3–0.5 mm, usually glabrous, rarely sparsely pilose, anthers 0.6–0.8 mm; carpels 5–12; styles 1.5–2 mm. Achenes light-brown to brown, 2–2.5 mm.


Phenology: Flowering summer.
Habitat: Dry, rocky metamorphic ridges, in subalpine conifer woodlands
Elevation: 2300–2900 m

Discussion

Of conservation concern.

Horkelia tularensis is known only from the Kern Plateau in Tulare County. Greenish and reddish plants can grow intermixed in a single population.

Selected References

None.

Lower Taxa

None.

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

... more about "Horkelia tularensis"
light-brown +  and brown +
2mm +  and 2.5mm +
longer than wide +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
Barbara Ertter +  and James L. Reveal +
(J. T. Howell) Munz +
compound +  and simple +
opposite +  and alternate +
8 cm80 mm <br />0.08 m <br /> (10 cm100 mm <br />0.1 m <br />) +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
flattened +
Potentilla tularensis +
30 cm300 mm <br />0.3 m <br /> (40 cm400 mm <br />0.4 m <br />) +
planar +  and cylindric +
2 cm20 mm <br />0.02 m <br /> (30 cm300 mm <br />0.3 m <br />) +
reduced +
free +  and distinct +
Kern Plateau horkelia +
open to congested +
not +  and aggregated +
2300–2900 m +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
linear-lanceolate +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
pilose +  and glabrous +
flattened +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
3 +  and 15 +
unisexual +  and bisexual +
not +  and aggregated +
obliquely ovoid +  and reniform +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Dry, rocky metamorphic ridges, in subalpine conifer woodlands +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
crassinucellate +
opposite +  and alternate +
marcescent +
winter-persistent +
villous +  and pilose +
divided +, cuneate +  and flabellate +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
oblong +  and obovate or oblanceolate +
palmate +  and pinnate +
shallowly toothed +  and deeply divided +
inferior +  and superior +
clustered +, biseriate +  and superposed +
recurved +  and reflexed +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0 (?) +  and 4 (?) +
free +  and distinct +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Flowering summer. +
adnate +, free +, connate +  and distinct +
Suppl. Calif. Fl., +
not arillate +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
persistent +
free +  and distinct +
spreading +  and reflexed +
lanceolate +
0.3 cm3 mm <br />0.003 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
Conservation concern +  and Endemic +
free +  and distinct +
branched +  and simple +
stramineous +, reddish +  and green +
decumbent +  and erect +
1 +  and 10 +
palmate +  and pinnate +
deciduous +
distinct +
subterminal +
filiform +
rough-thickened +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Potentilla sect. Horkelia +  and Potentilla subg. Horkelia +
Horkelia tularensis +
Horkelia sect. Hispidulae +
species +
inconspicuous +
enlarged +
reddish +  and grayish green +
hairy +  and inconspicuously conspicuously glandular +