Horkeliella purpurascens

(S. Watson) Rydberg in N. L. Britton et al.

in N. L. Britton et al., N. Amer. Fl. 22: 282. 1908.

Common names: Kern Plateau horkeliella or false horkelia
EndemicIllustrated
Basionyms: Horkelia purpurascens S. Watson Proc. Amer. Acad. Arts 11: 148. 1876
Synonyms: Ivesia purpurascens (S. Watson) D. D. Keck Potentilla purpurascens (S. Watson) Greene
Treatment appears in FNA Volume 9. Treatment on page 271. Mentioned on page 272.

Plants green or grayish green to gray, nonglandular hairs sparse to dense, often obscuring stipitate-glandular ones. Basal leaves (5–) 7–17 (–20) cm; petiole 1–5 cm; leaflets 15–30 (–35) per side, (2–) 3–10 (–20) mm, divided into 3–6 ultimate segments, hirsute (sometimes densely so) and villous (especially marginally), infrequently viscid-stipitate-glandular, or nearly glabrous except for villous tuft at apex. Cauline leaves 2–4, 2–10 cm. Inflorescences ± open. Pedicels (1–) 2–10 (–15) mm. Flowers 10–15 mm diam., epicalyx bractlets linear to narrowly ovate, 1.5–3 mm; sepals 3–6 mm, hirsute, sparsely villous, sometimes minutely glandular or stipitate-glandular; petals oblanceolate to narrowly spatulate or oblong, 3–7 mm; filaments 1–2.5 mm, filament opposite center of sepal shorter than those on either side, anthers 0.5–0.8 (–1) mm; styles 2.5–4 mm.


Phenology: Flowering summer.
Habitat: Dry granitic meadows at edges of conifer woodlands
Elevation: 1400–2900 m

Discussion

Typical Horkeliella purpurascens occurs on the Kern Plateau on the western slope of the southern Sierra Nevada in Kern and Tulare counties. More densely hairy populations farther south in the Piute, Scodie, and Tehachapi mountains of Kern County tend to have more congested inflorescences, shorter leaves, and fewer carpels; they may merit taxonomic recognition.

Selected References

None.

Lower Taxa

None.

... more about "Horkeliella purpurascens"
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
Barbara Ertter +  and James L. Reveal +
(S. Watson) Rydberg in N. L. Britton et al. +
compound +  and simple +
opposite +  and alternate +
17 cm170 mm <br />0.17 m <br /> (20 cm200 mm <br />0.2 m <br />) +
7 cm70 mm <br />0.07 m <br /> (17 cm170 mm <br />0.17 m <br />) +
Horkelia purpurascens +
20 cm200 mm <br />0.2 m <br /> (35 cm350 mm <br />0.35 m <br />) +
cylindric +
4 cm40 mm <br />0.04 m <br /> (20 cm200 mm <br />0.2 m <br />) +
coriaceous +
reduced +
free +  and distinct +
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Kern Plateau horkeliella or false horkelia +
congested +  and open +
not +  and aggregated +
1400–2900 m +
linear +  and narrowly ovate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
flattened +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
unisexual +  and bisexual +
not +  and aggregated +
deciduous +
obliquely ovoid +  and reniform +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Dry granitic meadows at edges of conifer woodlands +
sparse +  and dense +
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 /> (0.6 cm6 mm <br />0.006 m <br />) +
crassinucellate +
opposite +  and alternate +
winter-marcescent +
deciduous +  and persistent +
confluent +, imbricate +, overlapping +  and separate +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
glabrous +, viscid-stipitate-glandular +, villous +  and hirsute +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
linear +  and oblanceolate +
stipitate-glandular +
inferior +  and superior +
clustered +, biseriate +  and superposed +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0 (?) +  and 4 (?) +
free +  and distinct +
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 /> (5 cm50 mm <br />0.05 m <br />) +
Flowering summer. +
adnate +, free +, connate +  and distinct +
in N. L. Britton et al., N. Amer. Fl. +
not arillate +
purple-streaked +
persistent +
free +  and distinct +
erect +  and reflexed +
stipitate-glandular +, glandular +, villous +  and hirsute +
lanceolate +  and narrowly deltate +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Endemic +  and Illustrated +
free +  and distinct +
branched +  and simple +
reddish +, stramineous +  and green +
ascending +  and erect +
1 +  and 20 +
palmate +  and pinnate +
linear;lanceolate or elliptic +
deciduous +
distinct +
subterminal +
filiform +
rough-thickened +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Ivesia purpurascens +  and Potentilla purpurascens +
Horkeliella purpurascens +
Horkeliella +
species +
inconspicuous +
elongate +
enlarged +
grayish green +  and gray +
glandular-pubescent +  and villous +